Morning,

Andy, is that Pennzoil mileage improver a Gumout Product? I haven't been able to find a MSDS for Pennzoil mileage improver or Gumout for that matter but I have found a couple for similar "cleaning and mileage improver" products. They seem to contain a lot of stuff other than Stoddard Solvent, for example xylene and acetone. Give WD40 a try, we know from it's msds that is primarily stoddarard solvent 60 to 100% in fact.

Interesting your comment on your biodiesel. In effect you made B80 biodiesel 80% biodiesel + 20 percent mineral diesel/kerosene. Your observations where almost exactly what I observed when I was using the B20 pump Biodiesel. There was a lot of oil coming out of the exhaust as it wasn't really burning all that well.

Interesting the link you provided to the company in Ohio marketing the soy based bio lubricants and fuel addivitives. I note that the cetane boost product is available in 1 gallon and larger quantities; that would be many life times supplies! (if it works).

I don't imagine our testing will convince any of the die hard F2C team race fliers to deviate much from their their fuel norms but it sure has been educational what with all the twists and turns this thread has taken. I note the comments regarding the modified Olive Oil and patiently wait for more test results and comments. I did a quick search of the net and wasn't able to find any reference to Olive oil being used as an engine lubricate; it might be there but I never found the right rock to look under.

I have another .15 size engine that I can use for some testing weather and time permitting. The old PAW's are still waiting their rebuild (winter project) .

cheers, Graham in Embrun near Ottawa Canada