20w-50 in ZZ4?
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3rd Gear
Joined: Oct 2018
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20w-50 in ZZ4?
So we just picked up a nova ss with a zz4. It has a cam, intake, and carb. The builder's notes and previous owner's notes said that oil changes were done with 20w-50. I was wondering if I could continue the trend or put the recommended 10w-30 in? It has between 55-65 psi when warm and near 70 when cold.
EDIT: this morning when started up it was at 55 psi. After idling for 15 mins it dropped to 40 and was still dropping. I am going to continue to use the 20w-50 as it lubricates well. Only downside is that it takes forever to warm up.
2ND EDIT: Switched over to a synthetic 10w-30 and starts at 55-60 psi and at idle, warm, is around 25-30psi which is perfect for a ZZ4
EDIT: this morning when started up it was at 55 psi. After idling for 15 mins it dropped to 40 and was still dropping. I am going to continue to use the 20w-50 as it lubricates well. Only downside is that it takes forever to warm up.
2ND EDIT: Switched over to a synthetic 10w-30 and starts at 55-60 psi and at idle, warm, is around 25-30psi which is perfect for a ZZ4
Last edited by Hockeypickles23; Apr 29, 2020 at 08:21 PM.
