http://www.royalpurple.com/techa/whyrpa.html
I guess it's not too surprising that numbers vary from one source to the next, but this one is a bit out there. Royal Purple claims a TFOUT of 1300 minutes. In comparison, Amsoil/M1/RL are all greater then 400 mins, maybe hitting 500 mins. Is this test different then the other? Scroll towards the bottom.
I guess it's not too surprising that numbers vary from one source to the next, but this one is a bit out there. Royal Purple claims a TFOUT of 1300 minutes. In comparison, Amsoil/M1/RL are all greater then 400 mins, maybe hitting 500 mins. Is this test different then the other? Scroll towards the bottom.
