Fuel Mixture - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Bill Dillow · 10-05-2009, 07:32 AM

Some friends have older street rods and they all run a 50/50 mixture of 110 octane and 93 octane. Will this mixture damage my engine?

Banshee · 10-05-2009, 08:00 AM

The engine will gain a little, but nothing worthwhile to justify $4.99 a gallon for 110. Older street rods are Iron headed which required a blend. I had a 428 Pontiac which was 11.5 to 1 and ran on a blend of Sunoco 94 and 110. You now have cooler engined, aluminum heads which allow for higher compression and lower octane. Add in computer controlled timing and you only need to run 93 octane.

The recommended fuel is 91. I use 93 here. Using 100 octane would do very little to improve anything other than drain your wallet.

Bill Dillow · 10-05-2009, 08:03 AM

Thanks for the info Banshee.

FirstLSK · 10-05-2009, 08:25 AM

I have ran that combo in mine a few times (actually 109 & 93). I could tell a difference. It will not hurt your engine if that is what you are worried about. Give it try and see if your grin gets a little bigger

Just be sure to run the unleaded !!!!!!!!

.

10-05-2009, 07:32 AM	#1
Bill Dillow Drives: 2005 2500HD DuraMax, 2010 SS/RS Bla Join Date: Aug 2009 Location: WV Posts: 79	Fuel Mixture Some friends have older street rods and they all run a 50/50 mixture of 110 octane and 93 octane. Will this mixture damage my engine?

10-05-2009, 08:00 AM	#2
Banshee Institutionally Insane Drives: 2013 IOM 2SS/RS 1LE Join Date: Feb 2009 Location: Detroit MI Posts: 2,115 View My Garage	The engine will gain a little, but nothing worthwhile to justify $4.99 a gallon for 110. Older street rods are Iron headed which required a blend. I had a 428 Pontiac which was 11.5 to 1 and ran on a blend of Sunoco 94 and 110. You now have cooler engined, aluminum heads which allow for higher compression and lower octane. Add in computer controlled timing and you only need to run 93 octane. The recommended fuel is 91. I use 93 here. Using 100 octane would do very little to improve anything other than drain your wallet. __________________ It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspension, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas. What do you say, is it the new Bluesmobile or what?

10-05-2009, 08:25 AM	#4
FirstLSK Dude, I love my car !!!! Drives: 2010 Black 2SS/RS white rally Join Date: Oct 2008 Location: DFW Posts: 811	I have ran that combo in mine a few times (actually 109 & 93). I could tell a difference. It will not hurt your engine if that is what you are worried about. Give it try and see if your grin gets a little bigger Just be sure to run the unleaded !!!!!!!! . __________________ -------------------------------------------------

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10-05-2009, 08:03 AM	#3
Bill Dillow Drives: 2005 2500HD DuraMax, 2010 SS/RS Bla Join Date: Aug 2009 Location: WV Posts: 79	Thanks for the info Banshee.