Penn grade oil

390 & up cid Monster Motors
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mercuryman
Posts: 119
Joined: Wed Sep 12, 2012 11:08 pm
Location: Kalamazoo,Michigan

Penn grade oil

Post by mercuryman »

Hey everyone, my first post in the big block portion. I have a warmed over big block 390 cougar along with my comet and was wondering if you big block guys were using any ZDDP oils. Like Penn grade. Expensive but I’ve heard good things about it.

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Jims65cyclone
Posts: 2754
Joined: Sun Nov 23, 2014 10:29 pm
Location: Lexington, SC

Re: Penn grade oil

Post by Jims65cyclone »

I'm not a big-blocker, but my son-in-law turned me on to using Shell Rotella T. It's actually intended as a multi-grade diesel motor oil, but is fine for gas engines as well. The benefit is that it contains 3 - 9% zinc, as well as 1 - 5% polymer additives. It's designed for the high temps and wear and tear of big diesels, exceeding the requirements of Cummins, Caterpillar, etc. We've had good luck with it.

Jim
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fryedaddy
Posts: 711
Joined: Mon Nov 03, 2014 12:40 am
Location: east tn

Re: Penn grade oil

Post by fryedaddy »

all the guys i know use VALVOLINE 20W-50 in their fe engines.i run it in my 433 fe.it has extra zinc and all the good stuff a big block needs
fryedaddy
Image1966 caliente,428 4 speed,4.11 gears,nitrous,parachute

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