Can I switch from using 98 octane gasoline to 95 octane?
4 Answers
It is possible to switch from using 98 octane gasoline to 95 octane. Here are the specific details about car refueling: 1. 98 octane gasoline currently has the highest octane rating in China. Although it offers better anti-knock performance and power, vehicles designed for lower octane fuel should not blindly opt for higher octane gasoline. Higher octane ratings are more suitable for engines with larger compression ratios. Engines designed for 95 octane gasoline typically have smaller compression ratios, and using 98 octane gasoline may increase engine knocking. 2. Different octane ratings of gasoline should not be mixed, such as mixing 95 and 98 octane gasoline. Long-term use of mixed fuels could potentially affect the engine, leading to issues like carbon deposits and increased fuel consumption.
From an engine perspective, switching from 98 to 95 octane gasoline for your car depends mainly on your engine's compression ratio. High-compression engines require high-octane fuel to prevent knocking—performance cars or turbocharged models, for instance, may experience engine shaking or reduced efficiency with 95 octane. However, if your car has an average compression ratio, like most family vehicles, and the manual recommends 92 or 95 octane, switching to 95 should be fine. I've done it several times myself—the power feels about the same, and it saves money. But don’t rush; first check your owner’s manual to see if the manufacturer specifies 98. For long-term switching, try mixing half a tank of 95 and monitor the engine for a few days. If it runs smoothly, you’re good—both eco-friendly and cost-effective.
From a cost-saving perspective, switching from 98 to 95 gasoline is feasible and can save a significant amount on fuel expenses. 98-octane fuel is considerably more expensive, and switching to 95 can save you hundreds of dollars annually—a pleasant surprise. I drive an ordinary car and haven’t noticed any performance decline after switching; the engine runs smoothly. However, it’s not advisable to switch arbitrarily—it depends on the vehicle type. Some high-end or newer cars may require higher-octane fuel. For regular family cars, 95-octane works well and offers good value. When switching, avoid an immediate full transition; instead, mix the fuels and test for any abnormal noises or power loss. If no issues arise, proceed. This approach maintains your car while easing the burden on your wallet.
Referring to the vehicle manual is most important. I remind you, before switching from 98 octane to 95 octane fuel, be sure to check the recommended fuel type in the manual. Most vehicles allow switching to lower octane fuel as long as it's within the specified range, which won't damage the engine. Avoiding knocking is key; be cautious when changing fuel if the compression ratio is too high. If the manual states that 95 octane is sufficient, go ahead and switch—it's cost-effective and safe. The testing method is simple: after filling up with the first tank, pay attention to engine noise and acceleration performance.
