Try going to a bulk fuel/oil distributor Carl. They are more likely to know what you could use. I know that She'll and Exxon/Esso/Mobil have tech departments to answer questions like that. You could also try a dealer that sells and services your product or one like it. They must have something to use for that purpose.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.