Is it okay to use 92 gasoline regularly and occasionally switch to 98 gasoline?

[SanTyler]

Under normal circumstances, the gasoline octane rating for a car should follow the instructions provided in the vehicle's user manual. Alternatively, the owner can check the manufacturer's recommended gasoline rating on the inside of the fuel filler cap. If the recommended rating is 92, there is no need to use 98-octane gasoline. Below are some relevant points: 1. 98-octane gasoline: 98-octane gasoline currently has the highest octane rating in China. Although it offers better anti-knock performance and higher power output, vehicles designed for lower-octane gasoline should not blindly switch to higher-octane fuel. Higher-octane gasoline is more suitable for engines with larger compression ratios, while engines designed for 92-octane gasoline usually have smaller compression ratios. Using 98-octane gasoline in such engines may increase knocking. 2. Avoid mixing gasoline grades: Different octane ratings of gasoline should not be mixed. For example, mixing 92 and 98-octane gasoline is not recommended. In special cases, occasional mixing once or twice may not cause issues, but long-term use could negatively affect the engine, potentially leading to carbon buildup, increased fuel consumption, and other issues.

[Oscar]

As a seasoned driver with years of experience, I usually opt for 92-octane gasoline to save money. Occasionally, on a whim, I switch to 98-octane and notice the car runs smoother and more powerfully, with what seems like slightly reduced engine knocking. However, it doesn't significantly lower fuel consumption, so overall, it's still a bit hard on the wallet. If your car's manual recommends 92-octane, mixing in 98-octane occasionally isn't a big issue and won't harm the engine—it just does a better job at cleaning carbon deposits. Remember to stick with the fuel grade suited for your car; don't switch randomly for novelty's sake—once in a while is fine. Engine designs are inherently adaptable to varying octane levels, but frequent switching can introduce unnecessary variables.

[LaFrancisco]

As someone who frequents car enthusiast forums, I've learned from some mechanics that it's completely feasible to occasionally switch from using 92-octane fuel to 98-octane. The higher octane rating of 98-octane gasoline helps prevent knocking, resulting in smoother engine operation and quicker acceleration. However, to be honest, this shouldn't become a habit because if your engine's compression ratio is designed for 92-octane, switching to 98-octane won't improve efficiency or save money—it's much more expensive. In fact, frequent changes in fuel type require the electronic control system to adapt, which may cause short-term fluctuations in fuel consumption. It's advisable to try this only under specific circumstances, such as filling up with 98-octane before a long trip to clean the fuel system, but always check the manual for recommended values. This approach is both safe and reasonable, so don't over-rely on premium fuel.

[LeAubree]

When I was young, I loved tinkering with my car. I thought using 92-octane fuel was convenient and cost-effective, and occasionally I'd get impulsive and fill up with 98-octane for a thrill—it felt like the engine responded quicker and delivered more power. But honestly, there's no magical effect. If the engine is designed for 92, that's all it needs. Switching to premium fuel is just a waste of money. Occasionally mixing them is fine, and it does have the added benefit of cleaning carbon deposits, keeping the fuel lines and injectors cleaner. Just make sure to regularly check fuel quality and don’t get misled.