What grades of oil should I be using in the engine, auto box and dif?
87' 5.0l Autobox
Cheers
Oil grades
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Re: Oil grades
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.
Autobox is dexron 2.
not sure on the diff.
"Conquest is made of the ashes of one's enemy's" - Starscream.
1983 Trans Am 305 LG4
Member: 20443 - Richard
1983 Trans Am 305 LG4
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Re: Oil grades
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.
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Re: Oil grades
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!
KARR. 1987 Firebird Formula 5.7 V8 MANual. Grrr... SUPER LOUD electric exhaust cutout! (ERV) GRRR!!!
and 1998 3.8 Firebird BlackTail
Things I need: Fuel tank ventilation thing, fan temp sender, fit rear speakers, fit electric window switches, fit fender vents, get new fuel cap
and 1998 3.8 Firebird BlackTail
Things I need: Fuel tank ventilation thing, fan temp sender, fit rear speakers, fit electric window switches, fit fender vents, get new fuel cap
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Re: Oil grades
Is your diff open or LSD?
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With an official 325 horse power and 405 lbs of torque
With an official 325 horse power and 405 lbs of torque
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Re: Oil grades
Its just open diff
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Re: Oil grades
its 80W90 Gear oil for an open differential. Or GL-5 spec.
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