Originally Posted By: volodymyr
Falcon_LS,
Originally Posted By: Falcon_LS
Having said that, the engine (GM LL8) runs quieter and feels smoother than it did with M1 0W-40. It's also more responsive. Some may attribute that to going down a grade from a 40 weight to a 30 weight, but ESP 5W-30 is closer to a 40 weight than it is 30 - especially with the HTHS being just shy of 3.6.
Can you tell us how did it go in a long term? Are you still using low SAPs oils in your engine?
The reason I am following this thread is that I have more or less the same conditions as you: I live in a place where the petrol has low sulfur levels and most of the oils sold in Europe are now low/mid SAPs only.
My engine (MR20DE) specs A3, A1, A5, C2 and C3 so I am very interested in the results of your experiment
I'm still running M1 5W-30 ESP with no problems whatsoever. With the low/mid SAPS trend in Europe, I would stick with what's most widely available and use it.
That said, that's quite a variety of different specifications your manual calls for!