Originally Posted By: sicko
Very nice.
I didn't realize Pennzoil got into the 0w-40 competition.
Yeah, well they sorta did. The first year that SOPUS had the supply contract with Chrysler, they utilized Pennzoil Euro 5w40 in the SRT engines, and then Pennzoil introduced an Ultra 0w40 with the SRT vehicle logo on the bottle. But I was disappointed. Unlike the other Pennz Ultra grades, it's been reported that the SRT 0w40 was not a GTL base. It seems like they sorta whipped up a 0w40 at the last minute for the SRT application, to me. I'm sure its a good enough oil. I ran an interval with it and did both a UOA and VOA which I posted here. Looking at the "traditional" additive packages, it looks generally slightly less stout than M1 0w40, but probably within the error bars of cheap lab tests. And who knows what is going on that isn't revealed by a $30 analysis.
As a result of all that, I decided to run M1 0w40 in my 392 for now. Once the new Pennzoil product lineup fully shakes out and we see if the 0w40 winds up using GTL stocks (who knows if they'll call it "ultra" or "ultra platinum" or whatever), I might switch back. But M1 0w40 has such a solid reputation that I haven't been even remotely motivated to switch for the time being. The fact that I can only find PU 0w40 SRT in quart bottles and not jugs doesn't help matters, either.