Engine Break-in oil questions

[Justin87]

Hello all!

I think it’s about time I finally start my 90 GT that I did a motor and transmission swap on.

I would like some opinions on break-in oil.

What brands do you guys like?

After the initial start, setting timing and all that (assuming I can get it running ) how quickly should I change the initial break-in oil?

I’m under the impression that “first start” oil should be different than the first drive/actual engine break-in period, but I also am a rank amateur so who knows.‍

thanks for your time!

-Justin

 

[HemiRick]

Break in oil is mainly needed for flat tappet cams....if your engine has a roller cam, it should, forget about break in oil and just run whatever oil you are going to run in it for life.

 

[stormsedge]

forget about break in oil and just run whatever oil you are going to run in it

^^I agree^^ There was a day (so many years ago) when a light non-detergent (10 or 20w) was common practice in new builds...I never did it, and the guys I knew building real racing engines never did it. Start with what you are going to run.

 

[j753303]

as long as its not synthetic. i would wait at least 1000 miles for that.

 

[Justin87]

Thanks guys.

got all my fluids sorted. Going for a first start this weekend!