Originally Posted By: shpankey
Originally Posted By: aquariuscsm
Absolutely! I`ve seen terrible ones with M1,pyb and Valvoline wb. There was a guy here who had bearing failure with M1 15W50 and then another who ran M1 15W50 for over 14,000 miles and had only around 4ppm on iron and almost no copper.
This scares and excites me at the same time! lol. (look in my sig!) I'm the only one (I know of) that runs M1 15w50 in my Mazdaspeed 3. Certainly no UOA's out there for it. And I've read some scary stuff about the oil pickups on my car are too small to circulate such a thick oil and properly lubricate the top end. Yet here I am... breaking boundaries and testing it out. My Universal Averages for my car is 4,500 miles, which is how long I plan on running it and pulling a UOA to compare. I guess we'll soon find out. As an aside, my car has NEVER run better on any other oil, and I definitely felt some oomph when I put it in.... something I've speculated as a boost in compression due to it's viscosity helping seal the loose rings (I've been guessing I have low compression for awhile now). I guess I'll see. Next up after this though is Royal Purple 0w40, which will also get a UOA, though I plan on taking it out to 9,000 miles (doubling up the UA's so I can divide by half). My car shreds oil though, so that's a bit scary as well.
M1 15W50 imo is one of the best oils made. It runs super smooth in any car I`ve ever tried it in. It also seems to be able to take a ton of abuse. It`s a very thin 50 wt,so I`ll run it during the winter,along with RP 15W40. It wont hurt your car at all,I`d just keep on using it.