I just bought a new-to-me used 09 Hummer H3 with ~65K miles.
I'll be swapping all fluids in the coming months as part of routine new-ownership maintenance.
The manual transmission calls for GM 89021806. "75W-90 GL-3"
The Aisin AR-5 transmission is also found in several years of isuzu trooper, where the application calls out various motor oils depending on temps, 5w30, 5W-40, 10W-40, 15W-40 etc., which is not unfamiliar to me, as my other (soon to be retired) SUV (94 rodeo), with an isuzu MUA5 transmission, called for 5w-30 and it lasted without any hard part replacements for a quarter million miles on motor oil and various "MTF" fluids of similar viscosity and is still working just fine.
Royal Purple has a cross reference chart that offers HPS or XPR 10W-40 as an alternative to GM 89021806.
Given the cross references above, I'm having a hard time rationalizing the $20-30/qt prices to source the "special" GM stuff. As a matter of principal, I'm inclined to avoid what appears on the surface to be a fake "proprietary fluid" gimmick. I feel like this "proprietary" GM part is more likely a way to sell old engine oil at high prices.
The AC Delco Part number for this stuff, is, ironically: 10-4030
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We tend to just use whatever 0w30 or 0w40 A3/B4 we can find cheapest in the engines of all our cars (sometimes mobile, sometimes penzzoil, sometimes castrol, usually from walmart in 5 qt jugs), and is likely what I'll use in the engine for the hummer for "peace of mind." I'm very tempted to use it in the transmission as well, or put 5W40 T6 in it. Thoughts?
Lets assume for a moment that the GM "proprietary" fluid isn't available, or is a gimmick, or basically, just that I'm a stubborn pain in the butt and don't want to use it as a tiny fist raising exercise. What fluid would you use in place of it?
Thanks
-Eric
I'll be swapping all fluids in the coming months as part of routine new-ownership maintenance.
The manual transmission calls for GM 89021806. "75W-90 GL-3"
The Aisin AR-5 transmission is also found in several years of isuzu trooper, where the application calls out various motor oils depending on temps, 5w30, 5W-40, 10W-40, 15W-40 etc., which is not unfamiliar to me, as my other (soon to be retired) SUV (94 rodeo), with an isuzu MUA5 transmission, called for 5w-30 and it lasted without any hard part replacements for a quarter million miles on motor oil and various "MTF" fluids of similar viscosity and is still working just fine.
Royal Purple has a cross reference chart that offers HPS or XPR 10W-40 as an alternative to GM 89021806.
Given the cross references above, I'm having a hard time rationalizing the $20-30/qt prices to source the "special" GM stuff. As a matter of principal, I'm inclined to avoid what appears on the surface to be a fake "proprietary fluid" gimmick. I feel like this "proprietary" GM part is more likely a way to sell old engine oil at high prices.
The AC Delco Part number for this stuff, is, ironically: 10-4030
------------
We tend to just use whatever 0w30 or 0w40 A3/B4 we can find cheapest in the engines of all our cars (sometimes mobile, sometimes penzzoil, sometimes castrol, usually from walmart in 5 qt jugs), and is likely what I'll use in the engine for the hummer for "peace of mind." I'm very tempted to use it in the transmission as well, or put 5W40 T6 in it. Thoughts?
Lets assume for a moment that the GM "proprietary" fluid isn't available, or is a gimmick, or basically, just that I'm a stubborn pain in the butt and don't want to use it as a tiny fist raising exercise. What fluid would you use in place of it?
Thanks
-Eric