How much oil to convert"Car" fuel to "BOAT" fuel
03-22-2009, 01:44 PM
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How much oil to convert"Car" fuel to "BOAT" fuel
I have a gallon of Odonnell 20% nitro "CAR" racing fuel part number ODOP3220 and BeNOL racing castor oil. How much BeNOL should I add to the gallon of Odonnell 20% nitro to get 18% total oil needed for a "BOAT" engine?
03-22-2009, 08:53 PM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
Odonnell seems to be very cagey when it comes to oil quantity because all they say is they use a special oil package that gives the "equivalent protection" of 18% oil. Yeah right. It's probably safest to assume they use about 12% oil so if you want 18% you'd need to add 10 ounces of castor.
03-23-2009, 01:44 AM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
ORIGINAL: downunder
Odonnell seems to be very cagey when it comes to oil quantity because all they say is they use a special oil package that gives the "equivalent protection" of 18% oil. Yeah right. It's probably safest to assume they use about 12% oil so if you want 18% you'd need to add 10 ounces of castor.
Odonnell seems to be very cagey when it comes to oil quantity because all they say is they use a special oil package that gives the "equivalent protection" of 18% oil. Yeah right. It's probably safest to assume they use about 12% oil so if you want 18% you'd need to add 10 ounces of castor.
03-24-2009, 01:35 AM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
I learned that there are contract fuel test labs. I sent inquiries to a few to see if they would determine % oil of a nitro methane model engine fuel. TBC
03-24-2009, 01:33 PM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
ORIGINAL: rageman
I learned that there are contract fuel test labs. I sent inquiries to a few to see if they would determine % oil of a nitro methane model engine fuel. TBC
I learned that there are contract fuel test labs. I sent inquiries to a few to see if they would determine % oil of a nitro methane model engine fuel. TBC
03-24-2009, 07:00 PM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
Another fuel test lab, after telling me the $300 price for them to do it, outlined a relatively simple method that a layman like me could use to acurately determine the % oil content of the fuel. We shall see.
03-31-2009, 12:20 PM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
See attached picture. I filled a 50 ml Borosilicate (Pyrex TM) graduated cylinder ($10 on Amazon.com) with Odonnell 20% nitro Car Fuel at room temperature. I heated it over night (in a well ventilated garage) with a 150 watt spot lamp and reflective aluminum foil make shift oven. Nitro methane has a boiling point of 217F so it flashes off quick. The remaining oil measured at 7.25 to 7.5 ml at room temperature so the % oil in the fuel was from 14.5% to 15%. I can now add the necessary additional castor oil to give the 18% desired for boat fuel. Maybe 20% for engine break in. [:'(] Odonnell.
03-31-2009, 12:22 PM
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RE: How much oil to convert"Car" fuel to "BOAT" fuel
ORIGINAL: rageman
See attached picture. I filled a 25 ml Borosilicate (Pyrex TM) graduated cylinder ($10 on Amazon.com) with Odonnell 20% nitro Car Fuel at room temperature. I heated it over night (in a well ventilated garage) with a 150 watt spot lamp and reflective aluminum foil make shift oven. Nitro methane has a boiling point of 217F so it flashes off quick. The remaining oil measured at 7.25 to 7.5 ml at room temperature so the % oil in the fuel was from 14.5% to 15%. I can now add the necessary additional castor oil to give the 18% desired for boat fuel. Maybe 20% for engine break in. [:'(] Odonnell.
See attached picture. I filled a 25 ml Borosilicate (Pyrex TM) graduated cylinder ($10 on Amazon.com) with Odonnell 20% nitro Car Fuel at room temperature. I heated it over night (in a well ventilated garage) with a 150 watt spot lamp and reflective aluminum foil make shift oven. Nitro methane has a boiling point of 217F so it flashes off quick. The remaining oil measured at 7.25 to 7.5 ml at room temperature so the % oil in the fuel was from 14.5% to 15%. I can now add the necessary additional castor oil to give the 18% desired for boat fuel. Maybe 20% for engine break in. [:'(] Odonnell.
Initial fill was 50 ml not 25ml.
