Originally Posted By: oilboy123
The shop does not recommend syn oil because they want to sell you an engine sooner.
Break in on dino then use whatever oil you want. VR-1 is dino oil correct? If it was me I would run a syn oil regardless of what the shop said.
I agree 100% the shop builds engines and not oil.
I would run synthetic also from the start.
A 402 GM, Ford, Pontiac, Buick, Olds, Honda?
does it have a roller cam or flat tappet camshaft?
If you dont know for certain then I dont know what to tell you.
many many people buy built engines but really dont know how to maintain them.
Amsoil makes a 10w40 oil that is a High Performance oil with the proper additives for flat tappet engines.
I use this oil in my 351W with a solid lift cam and it works very well.
I will not change this oil for the life of the engine from previous experiences with this oil.