Originally Posted by
Coheed The Edge has a better package than the Royal. I guess we will just have to keep our eyes peeled. See which one is most available with the best additive pack.
We did a few tests here in australia on sheer film strenght, Royal purple was the best out of all the leding brands.
Ill see if i can drag up the link - its very interesting read.
Castrl edge was in the middle of the pack for oil film strngth with valvoline being number 2.