Can 92 and 95 gasoline be mixed for Lavida?
3 Answers
Lavida cars should not mix 92 and 95 gasoline, as it may lead to insufficient anti-knock performance, increased engine failure rates, higher fuel consumption, more carbon deposits, and clogged fuel injectors. Reason Analysis: Generally, the fuel cap of a vehicle indicates the recommended gasoline grade, and it is advisable to use that grade or a higher one. However, using a lower grade is not recommended. Vehicles that use 92 gasoline can switch to 95, but those designed for 95 should not use 92. The primary difference between gasoline grades lies in their anti-knock performance, which is a crucial measure of fuel quality. 92 gasoline has an octane rating of 92 and is suitable for mid-range vehicles (with lower compression ratios). 95 gasoline consists of 95% isooctane and 5% n-heptane and is used in engines with higher compression ratios. 98 gasoline has an octane rating equivalent to a mixture of 98% isooctane and 2% n-heptane. Its advantages include "two highs and two lows": higher anti-knock performance and power output, along with lower harmful substances and exhaust pollution. Refueling Precautions: Vehicles should not arbitrarily switch to a lower gasoline grade. Doing so may cause premature combustion, leading to engine knocking. Incomplete combustion can also increase carbon deposits, clogging ducts and injectors, and resulting in reduced power and higher fuel consumption.
I've been driving for decades and have driven the Lavida many times. In theory, mixing 92 and 95 octane gasoline is acceptable in the short term, such as an occasional instance when the gas station is out of stock—it won’t cause immediate issues. However, long-term mixing is not recommended for a simple reason: the difference in gasoline grades lies in their anti-knock properties. Most Lavida engines are designed for 92 octane fuel. If you frequently switch between different grades, the engine may operate less stably, fuel efficiency could drop, and fuel consumption may increase. A friend of mine experienced this—after mixing fuels, the car felt underpowered when climbing hills and developed slight knocking sounds. It’s best to stick with one type of fuel as recommended in the vehicle manual, perform regular maintenance checks on the fuel system, and avoid letting minor issues escalate into major repairs. Simply put, saving money and hassle is what really matters.
As an ordinary car owner, I drive a Lavida every day to pick up and drop off my kids at school. I never dare to mix 92 and 95 octane gasoline, fearing that engine problems might occur. Not only would the repair costs be high, but it could also affect driving safety. Although an occasional mistake might not cause immediate issues, engines react differently to different fuel grades. Long-term mixing can easily lead to carbon deposits or spark plug fouling, resulting in reduced performance and sluggish acceleration. It's best to follow the manual's recommendations—Lavida officially recommends 92 octane gasoline, and 95 octane should only be used if absolutely necessary. I also consulted a familiar mechanic, who said mixing fuels has little impact for short city drives, but you should pay extra attention to dashboard warning lights on long trips. In short, for the sake of the car, I stick to filling up with just one type of fuel.
