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Main bearing clearance and type of oil

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Old 10-04-2016, 11:02 AM
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Default Main bearing clearance and type of oil

Just put together my 408 ls2 motor. 4 inch crank. 4.030 bore. NA

My main bearing clearances are attached below along with the bearing taper. The motor is an aluminum block so it will expand a little bit more.

What type of oil do you guys think I should run?

Rotella synthetic 10w-40?
(Yes, I know it's diesel)
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Old 10-04-2016, 11:40 AM
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What oil pump?
Old 10-04-2016, 12:01 PM
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New ls2 regular
Old 10-05-2016, 07:58 AM
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I'd run a thick oil in that case, something like a 20w-50. Some of the thicker oils have a higher ZDDP content anyways, so that will help with break in. Then try thinner oils and see what the pressure is like.



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