We like Royal Purple because we were sponsored in our race cars for a few years but the HPR race oil is near $200 for a five litre bottle. (1 Gallon) So I use Penright in my car now.
yeah, free is good, we used to run what ever a sponser would give us , quaker state was the biggest one for oil, never had an oil related problem in 14 yrs , racing the same hemi----
