Hey guys, I need a quick question answered.

I am receiving my engine back from the shop soon, and want to know what oil & weight is best for breaking the car in, and then after the break-in process.

It has an Eagle Crank, Clevite & ACL Bearings, Manley I Beams, TTP Spec JE 9:1 pistons, M1's and Supertech head gear, Will be running Pump & Meth and driving the car 3 times a week atleast to and from work ... a few track visits at most over our "warm" seasons.

Can I still run the Mobil 10/30 or should I change to something else?

Last time I broke in on conventional 10/30 for 50 miles, then switched back to Mobil 1.

Ideas? Suggestions? Thanks.

ZB.

 

I would like to know as well..gear oil for a built tranny?
(not to jack the thread or anything)

 

Your engine builder should give you specifications on which oil to use in accordance with your bearing tolerances.

 

It's really a matter more of how the engine was clearanced (bearings, rings, so forth.) If it's a "loose" setup then you can run a heavier oil, but if it's clearanced "tight" (close tolerances) than you probably won't want a heavy oil.

 

damn fast freddie beat me to it...he is fast!

 

if you are only driving the car a little bit and tracking it, then for built engines use 15w50 race oil AMSOIL RD series.

break her in with some 30

 

MTG GL4 100% synthetic tranny shifts like butter.

 

Thanks guys!!! I just contacted them and left a message.

Perfect, thank you!

So is that 15w50 okay for cold weather as well? I drive the car anywhere from 32 to 50 degrees and 99% of the driving will be on the street whether it's beating it on a twisty back road, or in traffic on the way home from work.

Thank you for your help!

 

its going to warm up here very soon, you could also do 10w40 it still caries some of the zinc and phosforus the AMSOIL racing oil's carry

 

What are the benefits of zinc and phosforus? Sell AMSOIL on me! Why should I make the switch from my current oil?

is 15/50 too thick for the temperatures I'll be driving the car in? What about driving daily?

I need to know what is best fit for my build and situation

BUMP for other shop / people's experiences!

 

Bumpppppp-a-teeee-bump.

 

you can't go wrong with 10w40 synthetic.. mobil-1,motul the amsoil stuff is probably pretty good as well but i haven't had builders recommend it.

 

benefits of Zinc and phosforus in racing oils::::
APPLICATIONS
AMSOIL Dominator Synthetic 10W-30 Racing Oil is recommended for high-rpm, high-horsepower, turbo/supercharged, gasoline- or alcohol-burning and nitrous oxide gas-injected applications operated under severe conditions.

ZINC:
The next oil additive category is Zinc dialkyldithiophosphate, we'll just call it zinc. Zinc is contained as part of the standard additive package in virtually every major brand of engine oil sold today. Organic zinc compounds are used as extreme pressure, anti-wear additives, and are therefore found in larger amounts in oils specifically blended for high-revving, turbocharged or racing applications. The zinc in your oil comes into play only when there is actual metal-to-metal contact within your engine, which should never occur under normal operating conditions. However, if you race, or occasionally play tag with the redline on the tach, the zinc is your last line of defense. Under extreme conditions, the zinc compounds react with the metal to prevent scuffing, particularly between cylinder bores and piston rings.

 

That is great information ... Thank you!

What do shops usually suggest? There are tons of people on here running AMS block arrangements among other built bottom ends ... what oil is in your engine?

ZB.

 

bump, I just broke my engine in looking for same answer. I was thinking mobil 1 15w-50.