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Gas mixed with Race Fuel ?

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Old 07-06-2010, 03:46 PM
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Default Gas mixed with Race Fuel ?

My marina only has enthonal free 90oct and I can get 102oct race fuel ,just trying to do the math and want to come up with the correct mix to make 93oct gas. So 1 gallon of 90oct to ? 102oct.
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Old 07-06-2010, 03:54 PM
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Here ya go

http://ranney.com/mjr/fuel_blend.html

Last edited by apache727; 07-06-2010 at 03:57 PM.
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Old 07-06-2010, 04:00 PM
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http://members.cox.net/ftraycing/octanecalc.shtml
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Old 07-06-2010, 04:02 PM
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to get to 93 octane, use 25 gallons of 102 for every 75 gallons of 90
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Old 07-06-2010, 04:02 PM
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Ok got it, Thank you.....

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Old 07-06-2010, 04:10 PM
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If I did the math right, 3 gal of 102 + 7 gal of 90 = 93.6
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Old 07-06-2010, 04:14 PM
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Is the 102 a bulk tank fuel or is it 55gal drum qty? If it is, might check with the supplier and find out the specific gravity of the 102. If its a branded fuel like "turbo blue" or something, it may be a little lower SG than the 90. It will initially mix up just fine for about 7-10 days then will definately stratify (seperate layers)...

Not an expert, just a chemical blender familiar with SG's and blending..
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Old 07-06-2010, 04:30 PM
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If your engine is designed to run on 93 octane and you mixed the fuel and ended up with a higher octane say like 95 or 96could it actually hurt anything?.....would it hamper performance?
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Old 07-06-2010, 04:31 PM
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I was just going to pick it up from Sunco station and fill a big 20 gallon fuel tank up and the put the 90octain in at the marine.
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Old 07-06-2010, 04:45 PM
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Call down to the station and find the name of the fuel. Sunoco lists all their SG's in PDF form..
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