Originally Posted By: Anikiri
The Redline is not price competitive and I've never heard of anyone else use it. The more esoteric brands like valvoline synpower MST, redline euro series, fuchs, and ravenol do not have a lot of reviews on them and I am not sure how they will perform.
Whereas Liquimoly, PU, and M1 EST are tested and reviewed well.
The Redline Euro 5W-30 is $11.49/quart - seems price-competitive to me. What about Motul Specific 507 and Castrol LL03? I'm not confident in your answer at all, and I hope someone with some actual knowledge will chime in.