NITROGEN FILLED ONLY!!!!!!!!!!!!!!!!!! :laughing:
(I don't mean to flame this,) I have kind of gone both ways with syn vs dino, and on a 100K mile 3.4 in a Grand Am, the startup tick went away with synth.
I also am one of these 5K mile change guys, only use Wix filters.... blah blah blah. I can't say much for mileage, didn't notice anything different, but that motor sounded quieter, at startup at least, the rest sounded about the same from what my ears could tell.
On half the stuff I've owned, it's whatever was on sale, as long as it has the gold star on that bottle (APSI maybe?) it's passed the spec as far as I'm concerned. never blown anything up using it either lol
BUT I bought a used GMC Jimmy, was an 00, with the 4.3 Old guy owned it from the factory with Mobil 1 synth, only thing that engine had ever had in it, and it was the quietest engine I've ever heard in my entire life. I flip S10s, so I know a bit about that engine, and this was leaps and bounds quieter than any of the others. I can only tell the oil changed it. The truck had very good care taken of it, but still, that thing was cop car quiet! Even at that mileage.
So IMO if you go an entire lifespan with only synth, I think it might actually be a better oil.
On the other hand, who's going to put 200K miles on a mower or tractor? lol I think it's a toss up, or a wash. But even with what I've seen on that Jimmy, and using mine at 0, I won't switch to synthetic. I change my oil every year, and I only put about 10 hours a year on mine, with a Wix filter... I'm all about taking care of things, but I think synth is overkill for these.