Question: Best Motor Oil for High Compreesion Engines

[Kicnrocks]

I have a newly rebuilt 68 427/435, What is the best motor oil to use with this type of high compression engine? I plan on using the ZDDPLUS oil additive to protect the cam and lifter foot,(non-roller cam) have newer style valve guides installed, but am wondering if anyone can offer advice on which oil provided the best protection for this type of motor?

 

[baxsom]

oil is like underwear, everyone has their favorite and will hold on to them forever.

amsoil, valvoline vr1, anything with zddp in it, brad penn, joe gibbs

 

[Evolution1980]

Here's a good article that might shed some light on your decision making.

Corvette Action Center | Tech | Engine Oil Deep Dive - CAC's Comprehensive Look at Engine Oil and Flat-Tappet Camshaft Durability

I use Mobil-1 10w30 full synth. There's typically various flavors of this oil. I think the content is actually distinguished by the cap color and not what they are labeled as (Truck/RV, High Mileage, etc). In short, I pick the one with the least amount of API and ILSAC certifications. If I have a correct comprehension of the above article, the more current certs means less phosphorus, which is the opposite of what we want.

And I use Mobil-1 oil filters.

Oh, and I have yet to find a better price than WalMart on the 5-qt jugs of Mobil-1. Usually around $23, which is way cheaper than individual quarts. Also, if you are just breaking in the engine, there may be other considerations to account for.

 

[Vettehead Mikey]

oil is like underwear, everyone has their favorite and will hold on to them forever.

Also like underwear, regular changes are far more important than fancy brand names.