What weight oil to run
05-18-2012, 06:04 PM
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Car: 1992 Z28
Engine: 305
Transmission: 5 speed
Axle/Gears: 3.42
What weight oil to run
My 92 305 TPI car runs great, hold great pressure, no smoke, leaks, drips or noises. It is time to change the oil. I looked on the cap and it says 5-20 but the car has 121k on it. It has never had synthetic but I'd like to run a good oil. In a couple weeks it is going on a 2400 mile trip so I have to keep that in mind. Thanks for your input.
05-18-2012, 07:32 PM
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Car: 86 Iroc + 83 Firebird
Engine: Iroc 305 TPI, Firebird 305 4bbl
Transmission: 700r4 in both.
Axle/Gears: Iroc 3.27 Firebird 3.23
Re: What weight oil to run
i use mobile 1 10w-30, or castrol edge in all my cars, both work great.
05-18-2012, 07:37 PM
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Car: 1991 Camaro Z28
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73
Re: What weight oil to run
i use 5w-30. same motor but i have 60k on it. thats just wats recommended. since your doing that trip..id get royal purple just cuz ive heard good things about it besides it price. just dont go too thick
06-13-2012, 11:51 PM
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Car: 1986 Firebird
Engine: 5.0L V8
Transmission: T-5
Axle/Gears: 2.73
Re: What weight oil to run
5-20 is good for cold weather and 5-30 wont hurt it, but NEVER put 5-20 in a 5-30 engine. EVER
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