I've run their synthetic gear oil for as far back as I can remember w/o issue, and I go back a long way.
No problem. There are many products written about that some of us love, and others hate. I'll read up on their Delvac gear oil, and might consider it at a later date. I try and keep an open mind.Well, then I guess I should rephrase my statement: Mobil 1 doesn't make gear oil that is as good as they could make it. I think they do it on purpose so that it doesn't compete with their Delvac gear oil.
Really? used M1 for over 20 years before switching to Delvac for cost and less FM. Always like new after 60k of towing, on road, and off road.XOM makes good oils across the board. Except for their Mobil 1 gear oil, that's trash. Good thing they also make Delvac, that gear oil is good stuff.
All these years, I've used Mobil1 LS 75W-90 gear oil in my 2006 Silverado with good results. For over half of each year and for over a decade, it operates in real Alaskan winters where my truck runs in 4WD 90% of the time. No problems...
I don't think that their 75W-90 is that great, I was primarily thinking about that one. For some reason when it comes to easily available gear oil, Valvoline Synthetic seems like a better all-around option. Plus, Valvoline's 75W-90 is Milspec, Mobil 1 is not. Delvac 1 is though. Also, it's nearly impossible to find Delvac 1 75W-140, as I believe 80W-140 took its place for heavy-duty use.
Because it doesn't meet the requirements for SN PLUS, or ExxonMobil does not really care about an API license for the intended market.