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Author Topic:   Stupid question about av gas
Dirt Full Roller

Total posts: 33
posted June 04, 2005 09:27 AM  
Can you mix avgas and 93 octane pump gas?

Steve Dupree
Dirt Freak

Total posts: 316
posted June 04, 2005 01:27 PM  
Yes you can it works great. We run half and half in our 12.5 compression 454 street car just so it will not pre ignition. Ofcoarse we are at 4200 feet altitude so at lower altitude you would need more octane.

Dirt Forum Champ
Total posts: 5390
posted June 04, 2005 06:20 PM  
You can also run the av gas alone but put 3oz of Marvel mystery fluid per 5 gallons to lubricate the engine. Eddie

Dirt Full Roller

Total posts: 33
posted June 07, 2005 05:19 PM  
thanks fellow racers

Dirt Roller

Total posts: 24
posted June 10, 2005 07:50 PM  
Yes you can but Avgas has a different specific gravity due to being used at high altitudes than automobiles are used to,,,and I don't think it has lead in it so it doesn't lubricate worth a darn. Ran it for years because it was cheaper but always added lead or some kind of lubrication.

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