What brands of cars use 98 octane gasoline?

[JamesLee]

Cars that use 98 octane gasoline are mainly luxury sports cars or high-displacement vehicles, such as: Mercedes-Benz AMG, Audi RS, BMW M, Bentley, Rolls-Royce, etc. Gasoline grades: The 92 gasoline grade refers to a composition of 92% isooctane and 8% n-heptane; 95 grade refers to 95% isooctane and 5% n-heptane; 98 grade refers to 98% isooctane and 2% n-heptane. Gasoline composition: Gasoline is produced by refining different gasoline components obtained from petroleum refining, such as straight-run gasoline components, catalytic cracking gasoline components, and catalytic reforming gasoline components, and then blending them with high-octane components. It is mainly used as fuel for spark-ignition internal combustion engines in automobiles.

[StEliza]

To be honest, as someone who frequently drives various cars, I've noticed that 98-octane gasoline is mainly used by high-performance and luxury brand vehicles. For example, sports cars like the Porsche 911, performance models like the BMW M series, and premium vehicles such as Mercedes-AMG and Audi RS have powerful engine designs with high compression ratios. They require high-octane fuel to prevent knocking and ensure stable power output. Regular 92-octane fuel isn't sufficient and can easily cause engine noise or overheating. Additionally, supercars like Ferrari and Lamborghini must also use 98-octane fuel. Higher octane ratings allow for more complete combustion, reducing fuel waste, improving acceleration, and lowering maintenance costs. Even though some regular cars can now use it, if the manual specifies 98-octane, it must be strictly followed to avoid issues.

[VonMatthew]

Friends who have driven several cars know that, for example, my Porsche Cayenne requires 98-octane gasoline, while my neighbor's Volkswagen Sagitar only needs 92. Higher-octane fuel is suitable for turbocharged engines, commonly found in models like the Audi A4, as it provides better anti-knock performance and reduces engine vibration in urban traffic. If you drive performance cars like the Honda Civic Type R or Toyota SUPRA, you must use 98-octane fuel; otherwise, the horsepower will drop, and the car will wear out faster. For daily economy cars, 92 or 95-octane is sufficient—no need to spend extra. In terms of brands, German and Japanese performance lines are common, but maintaining these cars requires a bit more attention.

[ConnorLynn]

I think cars that use 98-octane gasoline mostly have high-compression engines like the Porsche Macan. The high octane rating ensures smooth combustion and prevents knocking damage, which regular fuel can't keep up with. Luxury or sports cars use it most frequently. It's also common in models like the BMW 5 Series to save on maintenance costs while prioritizing safety. Checking the owner's manual is always the most reliable approach.