When its twc3 rated, the companies paid tons of money to get the oil tested(something that amsoil refuses to do since they are a bunch of cheap a$$es).
I thought Amsoil has the TC rating? Which seems to be a higher rating than the tcw3 rating.
since i stopped useing the wally world tech 2000 i havent had to rebuild my motor in 3 years before was barely getting a year but oil is oil go figure
I invited Amsoil to jump in the debate on the "other" forum and they never stepped in. Go figure.