The AMSOIL XL-7500 5W20 is group III so it's not synthetic in the true sense of the word.quote:
Originally posted by dustyjoe1:
Admittedly the 5w20 I use is synthetic (m1, amsoil, torco). But I don't believe it will be a problem going 8,000 on regular 5w20....seems to be pretty good stuff. I run the motorcraft 5w20 in my wifes ford 5.4 to 8000km and seems fine.