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What are the Three Additions and Three Reductions?

6Answers
SarahLee
07/28/2025, 07:27:21 PM

The changes in the annual inspection standards mainly involve six major changes referred to as the "Three Additions and Three Reductions," which include new inspections for tires and wheelbase, as well as the removal of inspections for noise and electronic parking brakes. The three additions: tires, wheelbase, and lifting devices; the three reductions: speed, suspension, and interior noise inspections. Details of the three additions: Tires are crucial for daily vehicle operation but are often overlooked by car owners. The new standard adds tire inspections, which serves as a good reminder. The second addition is wheelbase inspection, implemented for the safety of car owners. Some truck owners illegally modify their wheelbase to increase cargo space, while off-road enthusiasts do so to enhance performance. These modifications are highly dangerous, and starting next year, such vehicles will fail the annual inspection. The third addition is the inspection of vehicle lifting devices, primarily aimed at checking the chassis to eliminate potential safety hazards. This also helps owners self-inspect for related wear and tear. Details of the three reductions: The new regulations have removed some controversial items, such as speed checks, which are now explicitly canceled. This inspection was previously criticized for damaging engines. The second removed item is suspension inspection. With advancements in automotive technology, including significant improvements in the quality of the three major components by domestic brands, this inspection has become redundant, and its removal benefits all parties. The third removed item is interior noise inspection, similar to suspension inspection. Previously, poor manufacturing processes often led to abnormal noises, making this inspection necessary for safety. However, with substantial improvements in assembly techniques by automakers, abnormal noises are now rare, rendering annual inspections unnecessary.

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AdalynnDella
08/11/2025, 10:45:20 PM

Three additions and three reductions sound like some tips for daily car driving and maintenance. I think it can be explained from a safety and maintenance perspective. The three additions refer to developing the habit of regular self-checks, such as increasing the frequency of checking tire pressure before each drive, increasing the inspection of engine oil and coolant levels to ensure they are sufficient, and increasing the confirmation that lights and braking systems are functioning properly. The three reductions involve minimizing risky behaviors, like reducing the bad habits of sudden acceleration or hard braking, reducing instances of speeding or overloading, and reducing carelessness during car use, such as forgetting to lock the car or close the windows. These practices can significantly extend the lifespan of a car, prevent minor issues from turning into major faults, and reduce repair costs. When I used to drive an old car, these habits helped me save a lot on repairs and enhanced my peace of mind on the road. Regular maintenance costs around 1,600 yuan, making it worry-free and hassle-free.

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GiannaLynn
10/01/2025, 01:45:31 AM

The 'Three Increases and Three Decreases' principle seems more like fundamental guidelines that novice drivers need to master for safe driving. The content includes: Increase observation of the surrounding environment by frequently checking rearview mirrors while driving; Increase safe distance, especially maintaining space between vehicles on slippery roads; Increase knowledge reserves, such as learning emergency handling procedures. On the three decreases side: Decrease speed at unfamiliar intersections; Decrease distractions like using phones or eating/drinking; Decrease emotional driving behaviors like road rage or fatigued operation. When I was young and just bought my car, I neglected to decrease phone usage habits and nearly rear-ended another vehicle. Now I remind myself to regularly check dashboard lights and maintain focus. These simple small changes can prevent insurance premiums from skyrocketing and make weekend short trips more worry-free.

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LouisRose
11/14/2025, 02:33:10 AM

The essence of the 'Three Increases and Three Decreases' approach lies in fuel-efficient and high-performance driving. The three increases include optimizing tire inflation to reduce rolling resistance, utilizing cruise control to maintain a steady speed for fuel savings, and regularly replacing the air filter to enhance engine efficiency. The three decreases refer to reducing unnecessary weight such as clearing out trunk clutter, minimizing frequent starts and stops in congested areas, and cutting down on idling time, like turning off the engine while waiting. Driving an economy car, I save a few dollars on fuel each day by following these practices. Over time, it adds up to thousands of dollars saved annually, while also extending engine life—eco-friendly and practical.

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DelDelilah
01/04/2026, 09:22:03 PM

From the perspective of daily maintenance, the 'Three Increases' refer to increasing self-checks: monthly checks for brake pad wear, increased monitoring of coolant and battery status, and scanning for warning lights. The 'Three Decreases' involve reducing negligence: decreasing the interval between oil changes, avoiding driving in harsh weather conditions, and minimizing delays in repairs. Once, I forgot to check the battery, which led to a breakdown on the road—a lesson learned the hard way. Now, I make it a habit to spend ten minutes every weekend on these checks, which can save thousands in major repair costs. Keeping emergency tools in the car is also a wise precaution.

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McMalia
04/01/2026, 04:16:41 AM

The 'Three Increases and Three Decreases' strategy is an overall approach to improving vehicle health: The three increases include using high-quality engine oil to reduce engine wear, learning basic troubleshooting skills such as identifying unusual noises, and installing auxiliary equipment like tire pressure monitoring systems. The three decreases involve reducing prolonged high-load driving that damages components, avoiding delays in maintenance schedules and part replacements, and minimizing unnecessary modifications that increase the risk of malfunctions. As a tech enthusiast, after implementing these measures, my fuel consumption dropped by 10%, and the vehicle's lifespan significantly extended. Driving for ten years without major repairs has saved me money and provided peace of mind.

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More Q&A

How do I jump start a keyless car?

Jump-starting a keyless car uses the same core procedure as any modern vehicle: connect jumper cables from a donor source to the correct terminals, then start the car while ensuring the key fob is inside. The primary differences involve key fob placement and locating the battery terminals , which may be in the engine bay or trunk. The process is straightforward if you follow the correct sequence and safety precautions. Step-by-Step Guide to Jump-Start a Keyless Ignition Car: Position Vehicles & Prepare: Park the donor car close to yours, ensuring they do not touch. Turn off both vehicles and all electronics (lights, radio, climate control). Locate the Battery Terminals: Open the hood. The battery might be in the trunk or under a seat; many cars have clearly marked positive (+) and negative (-) jump-start terminals under the hood even if the main battery is elsewhere. Consult your owner's manual to be certain. Using these designated points is often safer and easier. Connect the Jumper Cables in Exact Order: Red Cable to Dead Battery: Connect one red clamp to the positive (+) terminal of the dead car. Red Cable to Good Battery: Connect the other red clamp to the positive (+) terminal of the donor car. Black Cable to Good Battery: Connect one black clamp to the negative (-) terminal of the donor car. Black Cable to Ground: Connect the final black clamp to an unpainted, solid metal part of the dead car’s engine block or chassis. This is a crucial safety step to avoid sparks near the battery. Start the Vehicles: Start the engine of the donor car and let it run for 2-3 minutes. Then, with the key fob inside the vehicle cabin , press the brake pedal and push the ignition button to start your keyless car. Disconnect in Reverse Order: Once your car is running, carefully disconnect the cables in the exact reverse order: black clamp from your car’s ground, black from the donor battery, red from the donor battery, then red from your car. What If the Key Fob Battery is Dead? A keyless car with a functional 12V battery may still not start if the key fob’s coin battery is dead. Most manufacturers have a backup method. Typically, you press the start button directly with the physical key fob . Hold the fob against the button (often marked with a key symbol) while pressing the brake pedal. This uses an inductive signal to authenticate the key. Some models have a slot to insert the dead fob. Market data from service manuals indicates this backup start procedure is standard across major brands like Toyota, Ford, and BMW. Essential Safety and Equipment Tips: Cable Quality Matters: Thin cables can overheat. Use 4-gauge or 6-gauge jumper cables for safety and effectiveness. Avoid cheap 10-gauge or thinner cables, which are a common cause of failed jump-starts. Check Your Manual First: Vehicle-specific instructions, especially terminal locations, always take precedence. Some hybrid or high-end models have unique procedures. Avoid Sparks: Never let the cable clamps touch each other once connected to a battery. Always connect the final black clamp to a ground point on the dead car, not directly to its negative battery terminal, to minimize explosion risk. Cable Gauge (AWG) Typical Use Case Recommendation for Keyless Cars 10-gauge or higher Low-power electronics Not recommended ; too thin, high resistance. 6-gauge Standard passenger vehicles Adequate for most compact to mid-size cars. 4-gauge Larger engines, SUVs, Trucks Recommended for reliable performance and safety. If the jump-start fails after multiple proper attempts, the issue may be a completely dead battery that needs replacement, faulty cables, or a more complex electrical problem requiring a professional mechanic.
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How to jump start for dummies?

To safely jump-start a car, connect jumper cables in the correct order: red to the dead battery's positive, red to the donor's positive, black to the donor's negative, and the final black to unpainted metal on the dead car. Start the donor car, wait 1-2 minutes, then start the dead car. The process is straightforward but requires strict adherence to sequence to avoid sparks, battery damage, or personal injury. A successful jump-start hinges on preparation and correct execution. Industry data from automotive associations indicates that most roadside failures relate to batteries, and improper jump-starting is a common cause of subsequent electrical issues. Safety Preparation is Non-Negotiable Before connecting any cables, ensure both vehicles are in park or neutral with parking brakes engaged and ignitions off. Position the donor car close enough for cables to reach, but ensure the vehicles do not touch. Remove any loose clothing or jewelry. While not always listed in manuals, wearing basic safety glasses and gloves is a prudent practice observed by seasoned drivers to protect from potential acid splash or spark. The Critical Connection Order The cable connection sequence is designed to minimize the risk of a spark near the battery, which could ignite flammable hydrogen gas. The correct, safe order is: Red to Dead ( ): Connect one red clamp to the positive ( ) terminal of the dead battery. Red to Donor ( ): Connect the other red clamp to the positive ( ) terminal of the donor battery. Black to Donor (-): Connect one black clamp to the negative (-) terminal of the donor battery. Black to Metal: Connect the final black clamp to a solid, unpainted metal surface on the dead car's engine block or chassis, away from the battery and any fuel lines. This final ground connection completes the circuit safely away from the battery. Starting and Disconnecting Start the engine of the donor car and let it run for a full 1-2 minutes to allow some charge to transfer. Then, attempt to start the dead car. If it starts, do not turn it off. To disconnect, reverse the connection order exactly: remove the black clamp from the dead car's metal ground, then the black clamp from the donor battery, followed by the red clamp from the donor battery, and finally the red clamp from the once-dead battery. Aftercare and Troubleshooting Keep the jump-started vehicle running for at least 20-30 minutes of driving to allow the alternator to recharge the battery. If the car fails to start after a proper jump, the issue may be a deeply discharged battery, poor cable connections, or a more significant problem like a faulty starter or alternator. If the vehicle starts but fails to hold a charge and restart later, the battery likely requires replacement, a conclusion supported by standard automotive diagnostics.
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How to pay less for tires?

A strategic combination of smart shopping timing, brand selection, and proactive maintenance is the most effective way to pay less for tires. You can consistently save 20-30% by purchasing during key sales periods in April/May and September/October, opting for reputable mid-tier brands, and leveraging online price matching. Proper care can extend tire life by thousands of miles, delaying replacement costs. To transform tire buying from a reactive expense into a planned savings opportunity, focus on these three pillars: strategic purchasing, value-focused product selection, and lifecycle cost management. 1. Time Your Purchase for Maximum Savings The tire market follows predictable promotional cycles. Manufacturer rebates are most prevalent in late spring (April-May) and early fall (September-October) , coinciding with seasonal changeovers for all-season and winter tires. Major holidays like Memorial Day, Labor Day, and Black Friday also trigger significant sales events from both manufacturers and retailers. Planning your purchase around these windows, rather than waiting for an emergency replacement, is the single biggest lever for savings. Industry data shows consumers can save an average of $80-$150 on a set of four tires during these promotional periods through direct rebates. 2. Select Tires Based on Value, Not Just Tier Premium (Tier One) brands command a price premium for marginal performance gains that most daily drivers won’t fully utilize. Shifting to high-quality Tier Two or retailer "house brands" (often manufactured by major companies like Michelin or Cooper) yields substantial savings with minimal compromise on safety and longevity. Tier Examples Typical Consumer Benefit Potential Savings vs. Premium Tier One (Premium) Michelin, Goodyear Benchmark performance, often longest warranty - Tier Two (Value) General, Hankook, Falken Excellent safety, high durability, strong warranties 20-35% House Brands Discount Tire's "Pathfinder", Costco's "Kirkland" Reliable performance for standard driving, made by major manufacturers 30-50% 3. Employ Aggressive Price Shopping Tactics Start your search with major online retailers like Tire Rack, Discount Tire Direct, and Simple Tire to establish a baseline price, as they often include free shipping. Use this researched price to ask for a price match at local brick-and-mortar shops , which may value the in-person service opportunity. Always purchase a full set of four if possible, as this unlocks the best rebate amounts and often comes with free installation, balancing, or future rotation services. 4. Maximize Lifespan to Reduce Cost-Per-Mile The true cost of tires is not the purchase price, but the cost per mile driven. Simple, consistent maintenance drastically extends tread life. Inflation: Keeping tires at the vehicle manufacturer’s recommended PSI (found on the driver’s door jamb) prevents uneven shoulder wear and can improve fuel efficiency by up to 3%. Under-inflated tires can wear out up to 25% faster. Rotation & Alignment: Rotating tires every 5,000 to 8,000 miles ensures even wear. A wheel alignment check once a year or after hitting a major pothole prevents costly irregular wear patterns that can ruin a tire prematurely. Repair vs. Replace: A professional patch/plug repair for a minor central tread puncture is a safe, permanent fix that costs a fraction of a new tire. Pitfalls to Avoid Avoid the absolute cheapest Tier Three brands, as their faster wear rates lead to a higher long-term cost. Never drive on tires worn below 4/32" of tread depth, as it drastically increases stopping distances and the risk of hydroplaning. Forcing an emergency purchase removes all your negotiating power and timing advantages.
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How to suction out a car dent?

Suction dent removal is a viable, low-cost repair for specific types of damage. It is most effective on large, shallow dents located on flat or gently curved panels where the paint is intact and there are no sharp creases. Success rates are high for these ideal dents but drop significantly for complex damage, often requiring professional intervention. The process leverages basic physics. Creating a vacuum seal over the dent and applying a pulling force can gradually reshape the flexible metal back towards its original form. Applying heat (from hot water or a hairdryer) to the area for 20-30 seconds beforehand makes the metal more pliable and increases the chances of a successful pop. For optimal results, follow a precise sequence. First, thoroughly clean the area with soap and water to remove any wax or debris that could break the suction cup's seal. Lubricating both the cup and the car's surface with soapy water can improve the seal. After optionally heating the dent, center your tool—whether a dedicated dent puller with a locking mechanism or a heavy-duty plunger—over the lowest point of the depression. Apply firm, steady pressure to create the vacuum, then pull. A locking puller allows for a sustained, controlled force. With a plunger, a swift, forceful tug is often needed. It may take several attempts from slightly different positions, working from the outer edges of the dent inward, to fully restore the panel. This method has clear limitations. According to industry repair guides from organizations like I-CAR, suction is ineffective on dents with folded edges, sharp ridges, or damage on hardened high-strength steel areas common in modern vehicles. Attempting to pull such damage can stretch the metal further. Market data from valuation firms like Hagerty also notes that DIY repairs on unsuitable dents can diminish a car's value by creating visible repair marks. Dent Characteristic Suction Method Suitability Reason Size & Depth Best for large, shallow depressions Metal can flex back without permanent stretch marks. Panel Shape Works on flat or large-radius curves Allows for a complete suction cup seal. Paint Condition Requires intact, uncracked paint Prevents moisture intrusion and further damage. Edge Definition Fails on dents with sharp creases Metal is permanently deformed and requires pushing from behind. If the dent does not respond after a few careful attempts, it is likely beyond the scope of this DIY method. Persistent pulling on a resistant dent risks damaging the paint's clear coat. In such cases, seeking a estimate from a Paintless Dent Repair (PDR) technician is the recommended next step, as they have specialized tools to massage the metal from behind the panel without affecting the paint.
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How to sanitize the inside of your car?

The most effective way to sanitize your car’s interior is to first clean visible dirt with soap and water, then apply a disinfectant like 70% isopropyl alcohol or an EPA-registered product to high-touch surfaces, allowing it to dwell for the time specified on its label . This two-step process—cleaning before disinfecting—is crucial for killing germs. Avoid harsh chemicals like bleach or ammonia, which can damage materials. Sanitizing is different from regular cleaning. It targets pathogens on surfaces. For a typical car interior, focus on areas with the highest frequency of contact. According to detailed analyses of driver behavior and surface contamination, the steering wheel, gear selector, door handles (inside and out), touchscreens, and seatbelt buckles harbor the most germs. A 2023 study by the University of Michigan Transportation Research Institute noted that the steering wheel can host nearly four times the bacteria of a public restroom's toilet seat . Step Purpose Recommended Agents & Key Data Dwell Time (Critical) 1. Cleaning Remove dirt, debris, and grime that can shield germs. Diluted car-safe soap (e.g., 10ml soap per 500ml water). N/A – Wipe clean immediately. 2. Disinfecting Kill viruses and bacteria on surfaces. 70% Isopropyl Alcohol or EPA List N-registered disinfectants . Varies by product: Typically 30 seconds to 5 minutes. 3. Protecting Maintain material integrity post-disinfection. Leather conditioner; UV protectant for plastics/dash. N/A – Apply after surface is dry. Process Breakdown: Start by removing all trash and personal items. Wear disposable gloves. Use a microfiber cloth and the soapy water solution to wipe down all hard surfaces. This prepares them for disinfectants to work effectively. For disinfection, 70% isopropyl alcohol is highly effective against a broad spectrum of enveloped viruses and common bacteria . Higher concentrations evaporate too quickly to be reliably effective. Apply it with a cloth or use pre-moistened wipes. For touchscreens and instrument clusters, use a cloth lightly dampened with alcohol or a cleaner specifically designed for anti-glare coatings to prevent damage. Never spray liquid directly onto screens or electronic buttons. Leather and vinyl require special attention. While alcohol can be used, it can dry out these materials over time. Follow any disinfection with a dedicated leather conditioner to replenish oils. For fabric upholstery and carpets, a portable steam cleaner is an excellent chemical-free option, as the high-temperature steam can kill dust mites and many pathogens. Crucial warnings: Always test any disinfectant on a small, inconspicuous area first. Never mix cleaning chemicals. Ensure the cabin is well-ventilated during the process. Do not use hydrogen peroxide-based cleaners or bleach on colored surfaces, as they will cause permanent discoloration and material degradation.
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How to buff out scratches on a car?

You can successfully buff out a car scratch if it’s a clear coat scratch that doesn’t catch your fingernail. This process uses abrasives to level the surrounding clear coat, making the scratch invisible. For best results, you’ll need a dual-action (DA) polisher, a polishing compound, and proper technique to avoid damaging the paint. Deeper scratches that catch a fingernail require touch-up paint or professional repair, as buffing will not reach the base coat or metal. The essential first step is the fingernail test . Gently run your fingernail across the scratch. If it doesn't catch, the scratch is likely confined to the clear coat and is a candidate for buffing. This test is over 90% reliable for determining repair method. Always wash and dry the area thoroughly first. Embedded dirt will act as an abrasive during polishing, creating more swirl marks. A dual-action polisher is the recommended tool. Its random orbital motion significantly reduces the risk of burning through the clear coat compared to a rotary polisher, making it safer for beginners. A quality DA polisher costs between $80 and $150. Pair it with a soft foam polishing pad and a dedicated scratch removal or polishing compound, which typically costs $10-$15 for a bottle that can handle multiple repairs. Tool / Material Purpose Key Consideration / Cost Range Dual-Action (DA) Polisher To apply compound evenly with controlled abrasion. Safer for beginners; $80 - $150. Polishing Compound Abrasive formula to remove clear coat layer. Use "scratch removal" or "polishing" grade; ~$10-$15. Foam Polishing Pad To hold and apply compound to the paint. Use a soft pad (typically white or blue). Microfiber Cloths For initial cleaning and final residue removal. High-quality cloths prevent new scratches. Apply a dime-sized amount of compound to the pad. Work on a section about 2x2 feet at a time. Operate the polisher at a medium speed setting (approximately speed 4-5 out of 6) and use light pressure—let the tool and compound do the work. Keep the pad moving in overlapping passes. After a few passes, wipe the residue with a clean microfiber cloth to inspect your progress. The scratch should become less visible or disappear entirely. A critical precaution is to avoid overheating the paint . Constantly moving the polisher and not dwelling in one spot prevents heat buildup that can damage the clear coat. For hand application, which is labor-intensive and less consistent, the same circular motion with a microfiber applicator pad is used, but results vary. Once the scratch is removed, the polished area will be unprotected. You must apply a coat of carnauba wax or a synthetic sealant. This final step protects the fresh clear coat and restores the deep gloss. Market records show that skipping this waxing step leaves the paint vulnerable to quick oxidation and environmental damage.
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