wow!pen ultra is 10% better in this test then its closest competitor at 230 degree?wow,thawt is a huge gap (especially at those temperature ,I mean the higher the temp the less strength the oil can take but this one still is 10% better then the rest!
oh I believe it is valid all right!but not the complete picture ,as you will have notice some oil weren't tested (trucking industry oil,like mobil delvac le5w30 or t6 0w40)but it give a very good baseline of comparision!