Powermaster Fuel - Gone, But ...

[Peter Hess]

I have discovered a source of four or five gallons of Powermaster Sport fuel.  According to the information on the can it is 18% total oil, 1/3 castor and 2/3 synthetic.  If the oil content of Powermaster's Sport fuel is measured by volume - - as their GMA fuels were - - it would be a simple matter to add castor to raise the castor and total oil content to acceptable levels.  Per nitrorc.com it would take 7.9 ounces of castor per gallon to raise total oil to 23%, roughly 50/50 castor to synthetic.

So, the question is: Is the oil content of Powermaster Sport fuel measured by volume or by weight?

Since the Powermaster website no longer exists I am unable to get an answer there.  Perhaps someone out there can give me an answer to my question.

Thank you in advance for your help!

[Brett Buck]

I have discovered a source of four or five gallons of Powermaster Sport fuel.  According to the information on the can it is 18% total oil, 1/3 castor and 2/3 synthetic.  If the oil content of Powermaster's Sport fuel is measured by volume - - as their GMA fuels were - - it would be a simple matter to add castor to raise the castor and total oil content to acceptable levels.

   Oh good Lord, what is "an acceptable level"!?  I won the 2006 NATs (and numerous other contests like the 2007 and 2008 Golden State meet, 2006 Ted Goyet, etc) using that fuel straight out of the can. I have used it almost exclusively since 2003. David won the 2007 TT and (I think) the 2008 W/C, and certainly the 2009 NATs using that fuel.

    The oil content is essentially identical to SIG Champion, BTW, based on boil-down tests.

     Brett
   

[Bill Adair]

Hi Pete,

As far as I know, Powermaster fuel gives an honest measure of ingredients.

Only one manufacturer came up short on oil when I tested several brands, and published the results in our club news letter, and that was Morgan fuels. I tested Omega and Cool Power and was surprised to find their oil content well below what was claimed at that time. Every other major fuel brand that I tested was spot on for oil content.

I may have tested Powermaster as well, but that was years ago, and about three computers back, and I just don't remember now.

Bill

[Peter Hess]

Ah, Brett, please, a little humoring for those of us who are functioning at lower levels of experience and knowledge.  However, I can take all the advice I can get and I do appreciate comments and suggestions, especially yours, and especially when they help to dispel a small portion of my considerable ignorance.

By "acceptable level" I meant what I understand - - perhaps mistakenly - - to be recommended for the motors I use, mostly Brodak 40s and OS 40 FPs.  I would not hesitate to use and have used Sig Champion (20% oil, 50/50), GMA Powermaster (22% oil, 50/50), and Brodak (23% oil, 50/50).  But is it really OK to use a fuel with only 6% castor/12% synthetic in a Brodak 40 or a 40FP?  That is, really, a question, not a challenge.

[Larry Fulwider]

. . .  But is it really OK to use a fuel with only 6% castor/12% synthetic in a Brodak 40 or a 40FP? 

35 and 40 FPs like a lot more castor than that, my experience. Castor seems to work as a sedative for nervous FPs.

       Larry Fulwider