Synthetic for a 30 year old engine?

[Dyusik]

Ran my old 89 Beretta with Castrol Euro 0w40. Good stuff, leaked as it did always

 

[dave1251]

PYB 10W30. 6K OCI.

 

[dareo]

Mobil 1 5W30 High Mileage (synthetic and has high mileage additives) formula is what i would do.

 

[dlundblad]

I have no hesitation in switching anything over to synthetic regardless of mileage and age.

I changed a 30 year old Kubota to synthetic after it saw dealer 15w40 it's whole life. My father and I run synthetic in his 1971 240z as well.. Zero issues thus far.

If you find leaks starting, just fix them.

 

[dlundblad]

Originally Posted by dareo
Mobil 1 5W30 High Mileage (synthetic and has high mileage additives) formula is what i would do.


This or their 10w30 HM would be my choice as well. The 10w30 is an A3/B3 and is a bit more stout.