Hi what oil grade would you use currently has 105k on the clock been fully serviced oil grades used before are 15w50 fully syn (subaru4u)

and 5w40 subaru last stamp had 10w40??

Its had loads done at subaru4u including a hayward and scott downpipe what exhaust would go with this downpipe

Many thanks

 

I'm pretty certain on that mileage on a Classic, Oilman (Opie Oils) would recommend a 10W-40.

Classics tend to run on that - or 10W-50 should you live in the upper reaches of the rev band a lot.

 

Many thanks will stick in 10w40

Thanks