Royal purple synthedic oils

[bige386]

I was just wondering if anyone here uses Royal Purple Synthetic Oil
in there flatheads ?

I was watching muscle car on the tube this morning and they put this stuff in everything. Motor , tran brakes , rearend. I think the guy on the show even drank some himself.
I guess its suppose to be the cat meow for engines but is on the pricy side.

 

[flatjack9]

Undoubtedly they are a sponsor of the show.

 

[Old Henry]

. . . is on the pricy side.

Way overkill for a stock flathead IMHO.

 

[trulyvintage]

I use Royal Purple 85/140 gear oil in my rear differential on
my F350 tow vehicle .......



Jim

 

[Ken/Alabama]

I've got it in my 296ci flathead. Been using in there for a couple years

 

[jake197000]

i dont think you need it.