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Oil grades
Posted: Sun Mar 22, 2015 8:51 pm
by Metal
What grades of oil should I be using in the engine, auto box and dif?
87' 5.0l Autobox
Cheers
Re: Oil grades
Posted: Sun Mar 22, 2015 11:44 pm
by warlord
I believe the 87+ roller cammed engines required 5w30 and the pre 87 flat tappet cammed engines needed 10w30 from the factory.
Autobox is dexron 2.
not sure on the diff.
Re: Oil grades
Posted: Mon Mar 23, 2015 7:13 am
by bhm1712
Its also a good idea to run Valvoline racing oil for a flat tappet cam engine, or use any usual oil brand and use a ZDDP additive to keep the cam and lifters nice and lubricated with the correct minerals etc.
Re: Oil grades
Posted: Mon Mar 23, 2015 3:03 pm
by Firebreather
5w30 sounds quite thin for an old engine doesn't it? Mine is an 87 5.7 and I just use 10w 40 and stick to Castro gtx or something like that. It leaks at the valve seals anyway, so any thinner and it would be pouring out faster than I can fill it up! How do you know if it's a roller cam or a flat tappet? I know move has a carb on the top!
Re: Oil grades
Posted: Mon Mar 23, 2015 5:34 pm
by banker
Is your diff open or LSD?
Re: Oil grades
Posted: Sat Mar 28, 2015 5:09 pm
by Metal
Its just open diff
Re: Oil grades
Posted: Fri Apr 17, 2015 8:27 pm
by bhm1712
its 80W90 Gear oil for an open differential. Or GL-5 spec.