Break In Oil

[AMXguy]

I'm going to use Brad Penn break in oil on this engine, normally I use the old EOS and standard oil then change the oil after an hour of running.


Should I do the same thing with this oil or spin a new filter on and run it a little longer?

[Chryco Psycho]

you should be able to run it for 400 miles or so

[AMXguy]

Ok, I'll just spin on a new filter and run it a while.   thanks

[burdar]

There are many different thoughts on this.  Some say drain it right after the 20 minute cam break-in.  Others say you can drive it awhile.  The bottle of Lucas Oil break-in additive I used says to change after 1000 miles.   

[Topcat]

What viscosity do you recommend?
Should I go staright 30W? Or a multi Wt?

I see Brad Penn offers a semi synthetic as well.
I think it's more suitable for Catlytic cars?
 

[Topcat]

Re said:

What grade/viscosity did you do a break in on if you are running a flat tappet cam?

Outside temp break in for me will be between 60-70 degrees.

I'm feeling the 10-30W should be O.K. Is that a good viscosity?
When I went to Summit website, it says the 30 weight as a break in oil.
 

 

[LEMOOREACE]

I used the Comp Cams Break in oil and then changed the oil to Royal Purple 10W 30.  No issues.

[Topcat]

i once heard that bearing clearances and outside temps are the deciding factors on what weight beak in oil to use.

Then I hear it's what a personal preference you like. Brad Penn is what I hear to use.

[72cudamaan]

i once heard that bearing clearances and outside temps are the deciding factors on what weight beak in oil to use.

Then I hear it's what a personal preference you like. Brad Penn is what I hear to use.

I have always  broke in all engines with straight 30# oil. If you're not going to drive the car in the really cold temps, then there is no reason to use a multi weight anyway.

[Chryco Psycho]

I have used the 10-30 Z Alt , or just used additives in regular oil such as Comp Cams or others in regular high quality oil like Castrol GTX I generally use 10-30 or 10-40 , never 20-50 unless the engine is a race build with higher brg clearance