Thanks and yes it is a racing fuel lead added. The motor seemed run cooler. my friend ran it also and he said his was running cooler also. Both drivers felt that there was more "gitty-up" in their motors running it. When I saw the whiteness inside the pipes the first thing I thought was excessive heat, but then remebered that oil temp gages showed they were running cooler. Not sure yet what fuel they run at the track were are at this season.
Thanks,
Robert