this is a group 3 oil now (didn't used to be) - not really true synthetic anymore... although their Extended Performance version is still a true group 4 synthetic.
Isn't Royal Purple the last, real group 4 synthetic?
Nah... M1 Extended Performance is, and almost all the Amsoil synthetics are (the OE and XL ones are group 3, the rest are group 4). Not sure if there are other brands.
Comments & Reviews (3)
this is a group 3 oil now (didn't used to be) - not really true synthetic anymore... although their Extended Performance version is still a true group 4 synthetic.
Isn't Royal Purple the last, real group 4 synthetic?
Nah... M1 Extended Performance is, and almost all the Amsoil synthetics are (the OE and XL ones are group 3, the rest are group 4). Not sure if there are other brands.
Thank you!