Z24 oil weight

1980-1986 Datsun 720 forums. All 720-specific topics and discussion can be found here.
jyoungerZ
Posts: 1
Joined: Fri May 01, 2020 2:11 pm
Car: 1985 Nissan 720

Z24 oil weight

Postby jyoungerZ » Fri May 01, 2020 8:09 pm

Hello everyone, I've found out that my 1985 nissan 720 has low compression in cylinder 3 due to worn piston rings.
(did a wet compression test to prove rings are at fault. Cylinder 3 tested 100psi whereas all others tested 130-160)
I am currently running 10w-40 in the truck. Would switching to a higher weight oil temporarily fix the issue? I've heard that people will run up to 20w-50 in these motors. By the way I live in SoCal so it's almost always hot here.
Any help would be appreciated, thank you.


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