Re: Why does this engine use PREMIUM?
Because they make this a 10:1 high compression engine. The up side is that it creates more horse power on each explosion, but the down side is it cost more to the user, it require premium gas.
If you use lower octane gas on this engine, it may cause knocks. This pre-exlosion will cause damage to the engine because of the incorrect timing. However, this engine has knock sensors that will retard the timing of the engine and should run with no problem.
I'm actually trying a few tanks of regular gas on my car, I'll share the results over here later.