ChrisF: As an aside, I was a young policeman in Seattles "Ballard" area when I first me Ole Bardahl (the multi-millionaire oil additive inventor/producer) he was an interesting and industrious man and an avid boat and car racing enthusiast/promoter.
I would often take refuge on his Blue Ridge (NW Seattle) estate and write my reports in a corner of his property.
He was such a great guy and I attended his funeral many years ago.
It brought a tear to my eye when the folks that made this movie showed an original looking "BARDAHL" banner in one of the race track scenes.
I don't know for sure whether or not his "oil additive" worked but it made him an extremely wealthy man and he gave a lot back to the racing industry.
Hold into the wind
VarmintGuy
