WOW..if I could get 98 octane I would be excited....

Engines are designed around a specific octane level. Thus an engine that requires 98 octane will run worse and can possibly detonate early on a lower octane fuel. Higher octanes are essential for FI vehicles because of the increased air flow and heat.

You'll see with many Turbo cars that detonation is a HUGE problem (causing the piston to hit the valve).

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