What Types of Cars Use 98 Octane Gasoline?
2 Answers
Cars with engine compression ratios of 10 and above typically use 98 octane gasoline. Anti-Knock Combustion Capability: 98 octane gasoline offers higher anti-knock performance and power output, while 95 octane gasoline has average anti-knock combustion capabilities. Gasoline appears as a transparent, flammable liquid, refined from petroleum-derived components such as straight-run gasoline, catalytic cracking gasoline, and catalytic reforming gasoline. After refinement and blending with high-octane components, it is primarily used as fuel for spark-ignition internal combustion engines in automobiles. Introduction to 98 Octane Gasoline: 98 octane gasoline refers to fuel with an octane rating equivalent to a mixture of 98% isooctane and 2% n-heptane. Its advantages are summarized as "two highs and two lows": higher anti-knock performance and power output, along with lower harmful substances in the gasoline and reduced exhaust emissions.
I remember that 98-octane gasoline is mainly suitable for models with particularly high engine compression ratios. Performance cars like Mercedes-AMG series, BMW M Power, and Audi RS basically all require 98-octane. Also, some European luxury cars, such as the Porsche 911, have '98' printed on their fuel caps. Among Japanese cars, the 'East Demon God' GT-R is also quite picky. Actually, checking the fuel cap is the most accurate—the manufacturer's label is more reliable than online searches. Some large-displacement cars with cylinder deactivation technology can even save a bit of fuel with 98-octane, as reduced knocking means the ECU doesn’t need to frequently retard ignition timing. If you're driving a supercar, don’t hesitate at the pump—their compression ratios are all above 11:1. However, many cars now have labels stating '98-octane recommended, 95-octane minimum.' Following the manufacturer's advice is always the safest choice.
