oil weight for road racing?
Thread Starter
Member
Joined: Aug 2001
Posts: 294
Likes: 2
From: SoCal
Car: '85 Trans Am FAILBIRD
Engine: 350
Transmission: T56
Axle/Gears: 4th gen torsen 3.42
oil weight for road racing?
I've got a 383 with a high volume oil pump and an oil cooler. The rod and main bearing clearances are both ".0025. I'm looking for suggestions on which oil to break in with, and what to run after. I'm leaning toward a good 10-40 or 20-50 for break in, and probably mobil1 10-30 after a few hundred miles.
Anyone know a good source for oil recommendations depending on bearing clearance? I searched and searched...
Anyone know a good source for oil recommendations depending on bearing clearance? I searched and searched...
Supreme Member
iTrader: (5)
Joined: Jan 2002
Posts: 13,622
Likes: 5
From: Orland Park, IL
Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
i'd use 30 weight for break-in with GM engine oil supplment can added as well for the zinc content. then 10W30 mobil one after break-in and the rings have seated.
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