Just getting my rebuilt motor back, engine oil thoughts.....
 

The builder of my motor doesn't want me to use the Mobil 15W-15 that i was using. He says it's not the same quality it once was. He isn't trying to sell me on the oil he uses but did recommend Brad Penn racing 20-50. He also said he liked the amsoil 20-50 oil. Any thoughts?

Right now i have break in oil that will be coming out shortly.

Run VALVOLIN VR1 racing 20/50 !

AMSOIL 15w-50 Dominator Racing Oil

Yes, that would be the one.

https://www.amsoil.com/storefront/rd50.aspx?zo=1132530

Do a search on Hydorcruiser posts. Mobil 1 15-50 did change formulations from Red to Gold then to Silver cap. If I read things right Mobil 1 15-50 Silver cap is a good buy considering you can get 5 qts. at Wally World for 22 bucks.

I know, i have been running the mobil one silver cap. Didn't think i was having any issues till this. Also found out my oil temp was never making it over 130 degrees..........
I having the oil thermostat installed that CPP sells. Should fix that problem.

So no opinions on the Brad Penn oil?

Cloud,

I am not going to make an oil recommendation other than ..... if the builder is warrantying the engine, I would darn sure use what he says to :)

Bill Koustenis
Advanced Automotive Machine
Waldorf Md

I haven't heard of the oil that your asking about; however, I have run the Royal Purple in pretty much everything I own, especially the boat and have been very happy.

Brad Penn is what alot of the drag racers use, as well as what 4 engine builders that I know recommend.