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FrayAdjacent · 06-20-2007, 05:09 AM

Stick with 91/93 octane. Your engine will run best on it, and get the best efficiency.

In engines with higher compression ratios, where higher octane is recommended, you can lose power and possibly damage the engine if you use lower octane fuel.

Vice versa is not really true, either. In a vehicle that runs normally on regular, you gain NOTHING by using higher octane fuel.

Higher octane ratings in fuel only increase the fuel's threshold for detonation. In high compression engines, or forced induction systems, it is necessary.

You bought a Porsche. You didn't skimp. Don't skimp on fuel.

06-20-2007, 05:09 AM	#5
FrayAdjacent Registered User Join Date: Dec 2006 Location: Austin, TX Posts: 939	Stick with 91/93 octane. Your engine will run best on it, and get the best efficiency. In engines with higher compression ratios, where higher octane is recommended, you can lose power and possibly damage the engine if you use lower octane fuel. Vice versa is not really true, either. In a vehicle that runs normally on regular, you gain NOTHING by using higher octane fuel. Higher octane ratings in fuel only increase the fuel's threshold for detonation. In high compression engines, or forced induction systems, it is necessary. You bought a Porsche. You didn't skimp. Don't skimp on fuel. __________________ 2001 Boxster - Grey on Grey 1969 911T Targa - 'Stinky' http://www.zoto.com/frayadjacent/img...f27a-4a399.jpg <---- my car. ^ crap I post. "The existence of the flamethrower is evidence that someone, somewhere once said 'I want to set those people over there on fire, but I don't want to have to walk over there to do it.'"