Originally Posted By: tstep
Truthfully I like it. It serves my Chevy 5.3 very well. Smooths over the Chevy tick. It is running my son's Jetta 1.8 Turbo at a 64/36 mix of G-Oil/Castrol 5w-50 mixed to somewhat mimic viscosity properties of Castol 0w-30 (a guestimated mix of HTHS of 3.6, Kv100 of 12.3, Kv40 of 70.9). Also I think Zanzabar here is running it straight in his Jetta with good results and they are not the most forgiving engines. Also, if you check the website, they usually have a $10 Rebate outside all of the FAR offers that pop up occasionally. At $16 (after the somewhat annoying 2-3 months wait for the rebate) for 5 qts of the newer, more robust formula, I think it's a great bargain. The newer formula really doesn't have any VOA history, but on paper it looks fairly stout.
I'm running it in my twin turbo Audi, and have had mixed results so far. The first 5k mile run was all G-Oil, and at the end of the run I wanted to replace one valve cover gasket and I noticed some wear on the cam lobes that was not there the last gasket change.
I then ran M1 0W-40 for a 5k mile OCI, and now have gone back to G-Oil but have mixed 6 quarts of it with one quart of RL 20W-50 to increase the HTHS. When the gaskets start to leak again, I'll see if there is any more wear or not. Shouldn't be long, these Audi gaskets must be made of silly putty or something!