Originally Posted By: PhillyJoe
I think RP SL version was the good stuff. I consider RP SN to be "RP light". I think the boutique was eliminated from this oil. Still a good choice but it was better before.
Except that's the issue where the anti-RP crowd speaks out of both sides of their mouths. Before, people groaned that RP was using older API and ILSAC specifications. Now, people are complaining that RP uses current API and ILSAC specifications.
You still can buy non-certified RP in the HPS line, not to mention their dedicated racing oils. So no, it wasn't better before. Oil is rarely "better" in the past. It was different then, and now there are two lines that are suitable for passenger vehicle use. The boutique is still open.
dave1251: Buy RP at regular, Canadian retail prices and then buy PU at regular, Canadian retail prices up here (you'll never find PU anywhere that has a real sale), and I bet you'd be a Royal Purple user in about 3 seconds. Your choices are about $50 for a jug of RP or over $70 for a jug of PU.
Perplexingly, Canadian Tire and Walmart Canada carry RP, but won't carry PU. Up here, RP won't compete well with PP, QSUD, vanilla M1, and black Syntec, particularly when those are on rollback. But, it certainly holds its own in comparison to PU (if it can be found), M1 EP, and the high end Castrol.