Pump gas & Race Gas Blending chart w/ cost calculations

BerkTechnology · 01-09-2011, 08:58 PM

Someone asked the question about octane boosters and race gas cost differences. What is very surprising is that the cost of regular 91pump + octane booster about the same as blending race gas and pump. This online calculator will also give you the total cost per tank. The delta is less than $10 per tank.

The thing is that I KNOW race fuel is 100 oct (or whatever oct #) whereas octane boosters are unknown.

A just to give you some facts & figures using a 135i w/ 14 gal tank as an example:

To get 93 octane using MS109: Dump 2 gallons of MS109, top off with 91 oct.
$3.50/gal 91 pump
$12.00/gal MS109 = $66.00/tank

To get 93 octane using 100 oct pump: Pump 3.3 gallons of 100 oct, top off with 91 oct.
$3.50/gal pump
$8.00/gal 100oct = $63.63/tank

Full tank of 91 pump + NOS Octane booster ($15/can) = $65/tank.
Full tank of 91 pump + Torco Octane booster ($30/can) = $80/tank.

Cost for a 5 gallon pail of VP MS109 fuel (105 octane) is about $60 or $12/gal. If you have a gas station with 100 octane at the pump it is usually around $8 per gallon.

For reference the 135i tank is 14 gallons and 335i tank is 16.1 gallons. Have fun doing your own calculations with the link below.
http://ranney.com/mjr/fuel_blend.html

The moral of the story? Use race gas to blend your own fuel so you are getting a known octane rating.

octironSmith · 01-10-2011, 10:45 AM

Awesome! Thanks for calculating this out for us.

falcon133 · 01-10-2011, 11:22 AM

That answers a lot of my questions. Thanks a lot for doing the research.

01-09-2011, 08:58 PM	#1
BerkTechnology Lieutenant Colonel 223 Rep 1,565 Posts Drives: Fast Join Date: May 2008 Location: Irvine, CA iTrader: (1)	Pump gas & Race Gas Blending chart w/ cost calculations Someone asked the question about octane boosters and race gas cost differences. What is very surprising is that the cost of regular 91pump + octane booster about the same as blending race gas and pump. This online calculator will also give you the total cost per tank. The delta is less than $10 per tank. The thing is that I KNOW race fuel is 100 oct (or whatever oct #) whereas octane boosters are unknown. A just to give you some facts & figures using a 135i w/ 14 gal tank as an example: To get 93 octane using MS109: Dump 2 gallons of MS109, top off with 91 oct. $3.50/gal 91 pump $12.00/gal MS109 = $66.00/tank To get 93 octane using 100 oct pump: Pump 3.3 gallons of 100 oct, top off with 91 oct. $3.50/gal pump $8.00/gal 100oct = $63.63/tank Full tank of 91 pump + NOS Octane booster ($15/can) = $65/tank. Full tank of 91 pump + Torco Octane booster ($30/can) = $80/tank. Cost for a 5 gallon pail of VP MS109 fuel (105 octane) is about $60 or $12/gal. If you have a gas station with 100 octane at the pump it is usually around $8 per gallon. For reference the 135i tank is 14 gallons and 335i tank is 16.1 gallons. Have fun doing your own calculations with the link below. http://ranney.com/mjr/fuel_blend.html The moral of the story? Use race gas to blend your own fuel so you are getting a known octane rating.
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01-10-2011, 10:45 AM	#2
octironSmith Private First Class 22 Rep 184 Posts Drives: TiAg 135i, SGM X5 xDrive50i Join Date: Feb 2009 Location: Atlanta, GA iTrader: (0)	Awesome! Thanks for calculating this out for us.
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01-10-2011, 11:22 AM	#3
falcon133 Chief 2 Rep 82 Posts Drives: 135i Cabriolet, M-sport, 6sp Join Date: Dec 2010 Location: Stafford, VA iTrader: (0)	That answers a lot of my questions. Thanks a lot for doing the research.
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