I had foaming issues in two different motors with Brad Penn oil. One was a 462 Cliff Ruggles built that was in perfect running condition and the other was a mint 1978 truck 454 motor..
The lifters in both motors would start to chatter real loudly while climbing long hills at high way speeds around 3000 rpm. I would pull over let the motor idle for five minutes and they would quiet down.
I tried changing viscosity but it still did the same thing.
I changed back to 5-30 Mobil 1 in both motors and the problem vanished and never returned..
The old guy at the machine shop who never steered me wrong said to use Mobil 1 and stop believing in that zinc fairytale, that it was a bad batch of lifters that caused the rash of flat cam issues.. Who knows.. I'm real happy with 5-30 Mobil 1, I get it real cheap at Sam's club.
I don't use any additives. My old drinking buddy that worked for Pennzoil said to never use oil additives, that they take up precious little space were oil could be..
Some times I think there's too much information today, like my way off topic post here lol....
Last edited by 389; 03-19-2019 at 08:14 AM.
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