I plan to run Mobil1 10-30w oil in my 383 forged stroker w/ a P1sc blower..

Is it wise to use the Mobil1 oil for the first time? And then through the break-in period? Or is it a much better idea to just use regular 10-30w oil?

 

http://www.mototuneusa.com/break_in_secrets.htm

Check this out or do a Search. In short, to be safe, use conventional oil

 

I've been using straight 30 weight for years in new builds for the first few hours of operation.

Rich

 

As recommended by my engine builder, I used 15w40 Rotella T for diesel engines. It was used on the dyno, and the first 500 or so miles on the street.



Nick

 

i went straight 30w for the first 300 miles and then to royal purple full synthetic as suggested by the machinist that did my motor. I have no issues with using oil and the rings seated fine.

Scott

 

Alright, thanks guys!

 

Might want to research wether the M1 10w-30 is even a decent choice for this motor. What people say on here is not always right.
Go to the oil forum and look at UOAs of M1 in LT1s, the results might suprize you. Talking MEASURED results here not "they spec'd it in the Vette" stupidity commonly found on all the LT1 forums.

 

I have gone there.. pretty boring but i did last long enough to gather M1 10-40 is a good choice.

 

I used to be a Mobil 1 user in all my street cars, but I have read a lot of information lately that says that their formulation has changed significantly in the last few years - not as good an oil as it used to be. I now run all Redline stuff in the street cars, and still Kendall GT-1 in the race motors. If you want to run conventional, Chevron is still my first choice.

 

Hey it comes in the new Vette so it can't be bad.

 

Yeah - The GTO has the same LS2, spec is Mobil 1 5W-30.

 

OEM oil specs are about CAFE and marketing not ultimate longevity. If in stock form it makes it past warranty they are happy.

 

I know that Rotella T is basically a requirement for flat tappet motors, but is it bad to use in a roller motor?

 

TTT for an answer

I was told to use it for the additive package during break in.



David

 

That’s exactly why my engine builder uses it for engine break in, and the first 500 miles or so of street driving. As far as it being bad for roller motors, I couldn’t see how it would harm anything.



Nick