
Engine protector is useful. The functions of engine protector: 1. It can effectively protect the engine, significantly reduce engine wear, effectively prevent engine overheating, and extend the engine's lifespan; 2. Enhance the comprehensive performance of lubricating oil, with significant improvements for both synthetic and mineral oils; 3. Improve engine power and fuel economy, making the engine run more smoothly and quietly; 4. It can effectively clean the engine and prevent carbon deposits; 5. It has excellent anti-oxidation properties, effectively inhibiting the oxidative degradation of lubricating oil, while also reducing the formation of high-temperature deposits and low-temperature sludge, providing comprehensive and superior protection for the engine.

I've been driving for over 20 years and tried quite a few engine protectants. They do seem somewhat useful for older vehicles. My vintage car with over 100,000 kilometers on the odometer used to make constant engine noises, but the friction noise reduced significantly after adding the protectant - probably due to reduced component wear. These additives create a protective layer that strengthens the oil film and provides some anti-corrosion benefits. However, they're not miracle solutions. New cars already have sufficient lubrication by design, so you might not notice any effect after adding them. Choosing quality brands is crucial - otherwise you might just waste money or even risk clogging oil passages. I'd recommend considering adding them during regular maintenance, especially for vehicles frequently driven in harsh road conditions. But ultimately, sticking to fundamental oil changes remains more important.

I prioritize cost-effectiveness. Are engine protectants really worth buying? Some products are hyped up but expensive and may not deliver results. From my experience, they might offer minor benefits for high-mileage engines, like reducing friction and slightly improving fuel efficiency, but the improvements are limited. In contrast, regular oil and filter changes are what truly protect the engine's core. If your car is in good condition with a newer engine, you're more likely wasting money. It's better to save that cash and focus on routine maintenance. Also, using these additives requires proper timing—misuse could interfere with the performance of the factory oil. Bottom line: don’t count on them as a quick fix; prioritizing basic maintenance is more cost-effective.

Simply put, engine protectants work by using additives to enhance lubrication. They contain anti-wear components that fill metal gaps to reduce friction; some include detergents to clean carbon deposits. For aging engines, their use can slightly reduce wear and modestly extend lifespan. However, they're conditionally effective—only showing benefits when the factory oil has degraded. Overuse may backfire. I believe moderate application when needed can be beneficial.

Using engine protectants requires caution. I believe they offer certain benefits but shouldn't be overly relied upon. They help maintain internal engine cleanliness and reduce sludge buildup. For vehicles frequently driven long distances or operating in high-temperature environments, adding some protectant may help prevent early wear. However, this is only effective when using legitimate products and following instructions precisely. I always consult professional technicians to avoid ineffective products or side effects. New cars don't need immediate additives - consider them only when noticing abnormal engine noises or increased fuel consumption. Combining protectants with regular oil changes is the safest approach.


