Harry Dawg wrote: ↑Mon Jul 10, 2023 6:12 pm
I've been using O'Reilly's brand oil, just because I have become a bit of a miser now days.
After some digging, it looks like Omni is the manufacturer, but I haven't heard much about this company or the quality of their oil.
I do get a little chatter on the first start of the day, but only for a few seconds.
I have heard Pennzoil uses wax additives, so I have always stayed away from it.
Given the option, I would use Valvoline.
10W-30 year round just for better pressure and most of my rigs burn oil lol.
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Omni just repackages oil from Mobil, Exxon, and Shell. So I would assume there is some inconsistency bottle to bottle.
As for Penzoil, it used to have issues, but that was decades ago. They used high sulfur oil, and added paraffins to it. So it did get a reputation for sludge buildup. But to my knowledge, that is simple not the case anymore. Shell purchased Penzoil in 2002, and at some point after that Penzoil and Quaker-State just became repackaged Shell.
I have actually used Penzoil full Synthetic in my JKUR for the last few oil changes, and its been fine.