What kind of oil do you run in your third gen engines?
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Joined: May 2012
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Car: 1991 Camaro RS
Engine: 305 v8 TBI
Transmission: T5
Re: What kind of oil do you run in your third gen engines?
If you live in a cooler climate, use 5W-30. If you live in a warmer climate, use 10W-30.
I use Castrol GTX High Mileage, 5W-30. My 1991 Camaro has 120 K, and still runs like new, No leaks. The car's had 5W-30 running through it for 21 years.
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Joined: Nov 2008
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From: Michigan
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI
Re: What kind of oil do you run in your third gen engines?
You just had the oil changed at the dealer, and it's not running as good now? I would take it back and tell them.
Joined: May 2008
Posts: 1,361
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From: Alabama
Car: 87 GTA
Engine: 5.7 TPI
Transmission: 700r4
Axle/Gears: 3:27 BW 9 bolt
Re: What kind of oil do you run in your third gen engines?
I've been using Valvoline MaxLife 10w-40. I have the typical leaky valve seals, although this oil doesn't cure that.
Thinking of trying out the new Quaker State Defy.
Thinking of trying out the new Quaker State Defy.
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Joined: Oct 2004
Posts: 4,526
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: What kind of oil do you run in your third gen engines?
Rotella T 10w-30 it still has 1200ppm of zinc but I am thinking of adding some lucas zinc next change just for cheap insurance.
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Joined: Apr 2010
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From: Aurora, OR
Car: 87 IROC Z28
Engine: 355 cid TPI
Transmission: Custom Built 700R4 w/3,500 stall
Axle/Gears: QP fab 9" 3.70 Truetrac
Re: What kind of oil do you run in your third gen engines?
I think I saw where Edelbrock is producing a high zinc oil for flat tappet motors.
Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
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