i use royal purple 1030 synthetic. I dont run less than a 1030 unless it is in a newer car that calls for less. the new cars have aluminum blocks with tighter clearances so the thinner oil is needed. and your oil pressure may be fine but is the engine really being lubricated the way it should be.

Don't be misled by the 0W30 viscosity rating. It just means that the oil is like #30 at running temperature and like #0 (whatever that means) at zero degrees for easier cranking and oil flow. It has a shallower viscosity curve than 10W30, which means it's actually thicker than 10W30 when you're overheating.

How else do you keep together a 385ci gen1 SBC @ 6700rpm??? No really big clearances need thick oil, especially @ high, sustained rpm. That ain't no drag car....

Broke in my 355 with pennsoil 10w40 dropped down to royal purple 10w30 after roughly 1500-2000.

Royal purple 20w50 in mine...plus Lucas oil additive. Anything less and it knocks :/

I'm using mobil 10W30 on my 84 TA 5.0L

i use 5w30 royal purple in my car there in my tranny and rearend to and coolant

I noticed that you had the 700R4.. u use Royal purple ATF in it?
How does it shift??
Thanks

it shifts fine i also have a corvette servo and it shifts very hard from 1-2-3

Do you mean firm, or hard?

...

valvoline 10w40, always run that since i changed the oil day after i got the car, runs good

I recently switched to Amsoil Z-Rod 10w30 and I noticed a decrease in "cam chatter" after doing so.

I have never heard of cam chatter. Do you mean lifter noise?

Yeah that's what I meant lol. Half asleep. That faint and mellow, "plink plink plink plink plink..." you hear when the engine is idling.

Rotella T high zinc 10w-30 good for flat tappet cams.

Better double check, EPA has made them remove all the good stuff from oil, even diesel oil.

Why the rash of "break in" oils as they are a loop hole to the law, as they assume your only gonna use it once


Dino + ZDDP

Trust me I have as per my last communication with Shell on June 27th this year they are still at a minimum of 1200ppm ZDDP in rotella T triple protection.

Not as awesome as before but still well above regular motor oil and good for flat tappet cams.

Rotella has an oil called high zinc?

It is actually Rotella T triple protection it is designed to meet CJ and CI requirements and has 1200ppm zddp at least according to the email i got from shell. I use the 10w-30 but it also comes in 15w-40

switched to Mobil 1 Synthetic today in my ZZ4.