fssnotch, I agree that VR1 is probably the best
oil currently available for flat-tappet engines, but I still can't find anything saying Castrol is second worst
oil in any way. There's way too much info to search through on CC looking for that comparison, but I don't remember reading anything like that here or anywhere else...don't mean to hijack this thread, but can anyone point to a definitive source that rates Castrol poorly? The best source I can find is here
http://www.bobistheoilguy.com/
and apparently those guys are okay with it (for roller tappet with the new GTX).