If you used mid-grade or Regular unleaded and did not get any pinging, then you are throwing your money away using the Premium grade. The difference in the fuels is the octane rating and the only thing that octane does is increase the temperature at which the fuel ignites. If your engine does not show signs of pre-ignition using regular fuel, then you are not gaining anything by using higher octane fuels.
Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Scarbrough Sent: Monday, December 28, 2009 7:19 AM To: [email protected]; [email protected] Subject: Re: [Spits] Some 1500 questions I've got a 76, I assume it's 9:1. I use premium fuel. The cost difference around here is about 12%. That means, at 25 MPG, it costs an extra $12 to go a thousand miles. If I couldn't afford that, I couldn't afford a Spitfire. I have used regular and mid-grade, but not in the hottest part of the year. I didn't notice any problems, though. Of course, in sunny San Diego, it'll be a little more expensive. But it's been my experience that higher octane fuel is available most everywhere. You could store a bottle of octane boost in the boot for emergencies. Jeff Scarbrough 75 TR6 x 1, 76 1500 x 2, 78 1500 x 1, 80 1500 x 0.5 http://www.fishplate.org/vehicles/ Corrosion Acres, Georgia #354 You are subscribed as [email protected] [email protected] http://autox.team.net/mailman/listinfo/spitfires http://www.team.net/archive _______________________________________________ Support Team.Net http://www.team.net/donate.html You are subscribed as [email protected] [email protected] http://autox.team.net/mailman/listinfo/spitfires http://www.team.net/archive
