Should Fuel Additives Be Used in New Cars?

[Lopes]

New cars should not use fuel additives. Although fuel additives have benefits such as cleaning system carbon deposits, increasing octane rating, improving atomization, reducing wear, and protecting the engine, for new cars, using regular fuel is more beneficial in helping various components, especially the engine, to break in properly. Therefore, the use of additives is not recommended. Fuel additives can be categorized by their target use into gasoline additives and diesel additives, and by function into three types: cleaning, maintenance, and performance-enhancing. Both cleaning and maintenance types contain cleaning agents in their chemical compositions, which can effectively clean or inhibit engine carbon deposits. Based on different chemical compositions, additives are classified into five generations.

[LaDelaney]

I've been driving this car for five or six years now. When I first bought the new car, I also thought about fuel additives. The manufacturer's manual didn't mention anything about them, so I decided not to use them initially. Later, I talked to a mechanic, and he said a new car's engine is as clean as a newborn baby, so there's no need to clean the fuel system at all. The main function of additives is cleaning, and since new cars don't have carbon buildup, adding them would just be a waste of money. Moreover, there are many unknown ingredients in off-brand products on the market, and using them might even damage precision components. Now I think if there's a real maintenance need, it's better to wait until the car has run 40,000 to 50,000 kilometers. If you're worried about fuel quality, just choose reputable and regular gas stations to refuel, and there's no need to fuss with additives and such.

[BethanyDella]

Right after I got my new car last year, gas station attendants kept pushing fuel additives, which really confused me. I specifically consulted the after-sales supervisor at the 4S dealership, who clearly stated that new cars don't need any additives at all. Now my car has run 30,000 kilometers, and the engine remains spotless. Think about it - a new car is like a brand-new frying pan; why rush to use cleaning agents when it hasn't even started sticking yet? The key is choosing the right gasoline grade and sticking to regular maintenance. I've seen a friend damage their oxygen sensor by randomly using additives, costing over a thousand yuan in repairs. So now, I even refuse those free trial samples from gas stations.

[AlainaLynn]

Regarding the use of additives in new cars, I've done quite a bit of research. Additives mainly fall into three categories: cleaning agents, octane boosters, and maintenance additives. New car engines have precise component clearances, and cleaning agents may actually damage the protective oil film. Octane boosters are completely unnecessary for new cars, and the effectiveness of maintenance additives is still debated. On automotive engineering forums, someone conducted an experiment with two groups of identical new cars. After six months, when the engines were disassembled, the group using additives actually had more valve carbon deposits. From my personal experience, there's no need to consider additives for the first three years of a new car. It's more practical to save that money for full synthetic oil changes. Wait until the mileage reaches 80,000 kilometers before reevaluating.

[Diaz]

Having driven three cars, my experience tells me that fuel additives are all about timing. During the first two years when the engine is at its peak, adding them is completely unnecessary—it's like putting three screen protectors on a brand-new phone. Moreover, low-quality additives may contain silicates that can clog fuel injectors. A friend who works at a gas station mentioned that the profit margin on those promotional additives exceeds 200%, with costs as low as a few dollars. If you really want to maintain your car, I recommend waiting until after the warranty period and then using a bottle of manufacturer-certified cleaner every 5,000 kilometers. My own car is almost out of warranty, and I'm planning to buy two bottles of Honda's genuine fuel injector cleaner to keep on hand. Just remember not to mix different brands.

[DelMaria]

A few days ago, I helped my cousin pick up his new car and we discussed fuel additives. He specifically went through the owner's manual and found that German and American car manuals explicitly advise against using them, while Japanese car manuals don't mention them at all. I suggested he hold off on the idea since the car is still under warranty, and using additives might void the warranty if any issues arise. If he really wants to use them, he can wait until after the first service and check the exhaust pipe. If there's black powder residue, it indicates carbon buildup. Alternatively, he could consider additives if there's a sudden increase in fuel consumption. But honestly, my old Passat has run 120,000 kilometers without ever using additives. A monthly highway drive to clear carbon deposits works much better. For a new car, it's completely unnecessary to add unnecessary complications.