Recommendations for break in oil???

[harrymaneuvers]

Just wondering what people on here are using for break in oil on a newly rebuilt motor and why you use that compared to others.

GO!

[decke48]

Usually something with a good zinc and phosphorus content. If you can run a straight grade thats a plus. Ive run shell SAE30 rotella with good luck

[harrymaneuvers]

So nobody uses "break in" specific oil?

Joe Gibbs, Brad Penn, AMSoil, Royal Purple all have specific break in oils.


Not to mention the plethora of ZDDP supplements/additives that are out there.


I guess I will go with AMSoil because I am obviously a dealer so I get a great price on it and it looks like it is right in line with what most people suggest; SAE30, Zinc + Phosphorus, no friction modifiers ect.

[fireman2101]

I used some when I built a 472 but that was a few years ago and I don't remember what kind I used but if your an amsoil dealer I don't think your going to find a better price. They all pretty much have the same additives that you mentioned and (I think) it comes down to brand preference. I know it was a bigger deal to use it with the older style engine.

[rougeben83]

the only reason I've seen people use a specific type of "break-in" oil is when they have flat tappet cams, otherwise basically the stuff that you listed applies, and that goes for a lot of oils that arent marketed for "break-in"...

[elislider]

anything. you're only gonna run it for a few hundred miles anyways, maybe less.
remember, whatever oil you use is going to immediately get polluted with the assembly lube used when you put the engine together.

honestly i would just put in whatever is cheapest, 10w30, let it idle for a while, drive it a short distance, then drain it and replace the filter and then youre good to go.
for you case, its not a turbo engine, so the "break in" is not as crucial

[Patrick Olsen]

I used Joe Gibbs BR30 when I did a "built" EJ25D/EJ251 a few years back. For the LS6 in my CTS-V I used some sort of conventional 5W-30 or 10W-30 + the GM Engine Oil Supplement for the initial start up and high idling period, then drained that out and put in BR30.

Out in the garage I've got a couple bottles of Comp Cams break-in additive that I plan to use (with some sort of conventional oil) whenever I get around to doing my EZ30 swap.