Again, apples to oranges here. Non-rebuilt 283 V8, I run 5W-30 synthetic 'cuz I stock a lot of it for other purposes. No oil related issues and it runs 30 psi hot wound out.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy