duramax02
03-11-2005, 09:24 PM
I am wanting to replace the oil in the rearend on my 2500HD. Do I have to use the oil 75w90 (grapejuice) that my dealer sells for $27.00 a quart? Or can I just go to Autozone and use Mobil 1 syn. rearend oil?
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wickll 03-11-2005, 09:26 PM Mobil 1 is what I have in mine. It meets the specs in the owner manual. (GL-5 I believe.) JohnnyO 03-11-2005, 09:31 PM i am using redline 75W90 duramax02 03-11-2005, 09:34 PM What about royal purple syn. 75w90. I can get it for $8.99 quart. WanaDmxsub 03-11-2005, 10:19 PM Mobil 1 here also. Roegs 03-12-2005, 01:59 AM Grape juice in mine from Eric at much less than $27 per quart. Victory Red 03-12-2005, 09:41 AM mobil 1 here front and rear. They spec out 80w90 for the rear, but seems a lot of here are running a 75w. As long as it's GL5 rated, you're good to go. | ||