There are some UOA's on this oil. For the few there are, it has never done bad. I don't do the Checker rebates anymore, I am way to sick of wasting my stamps to never get anything out of them.
I did buy a case at 1.09 per quart. Plus the cost of the stamp for the rebate which I never recieved. Probably be a few more months before I get a chance to run it. By then I'll have UOA's of Castrol and Valvoline to compare it to.