Break-in oil

dave350v8 · Post by **dave350v8** » Tue Mar 04, 2008 7:31 pm

Hi,what grade of oil would you recommend to break in my small block chevy,cheers Dave

RoverP6B · Post by **RoverP6B** » Tue Mar 04, 2008 9:03 pm

The "running in" oil will mimic the grade of engine oil that would normally be used in that engine.

For a Rover V8, a 20w-50 "running in" oil would be used, then changing to a mineral 20w-50 or maybe 20w-60 after that.

As for the Chev?

Ron.

dave350v8 · Post by **dave350v8** » Tue Mar 04, 2008 10:53 pm

Anyone running a chevy out there??

TVRleigh · Post by **TVRleigh** » Wed Mar 05, 2008 12:33 pm

Is running in oil any good.

kiwicar · Post by **kiwicar** » Wed Mar 05, 2008 1:43 pm

My understanding for running in my chevy is you use a single viscosity mineral oil normally 30W.
This is what I am planning for mine any way.
I will put it in for about 100-200 miles and run it gently (if I don't run it in on an engine Dyno that is) then stick in a 15/40 sinthetic (to be changed every 2 to 3k.
Mine is going to be rebuilt on the top end every 6k miles and stripped and freshened every 24K if it doesn't get fiddled with before hand.
Don't know if that is any help, but it is a chevy and it will be run in.
Mike

bodger · Post by **bodger** » Wed Mar 05, 2008 1:59 pm

i would use a cheap oil with no friction modifiers in it as you want some wear to happen otherwise you will or should i say could get glazing ...

i always do a first runup with some cheap shite in it only until the engine temp gauge starts to move , then dump the oil that gets rid of any unwanted bits and bobs , then run a half decent oil for a 1000 miles then switch to something good there after

HairbearTE · Post by **HairbearTE** » Wed Mar 05, 2008 8:12 pm

Change the filter early on too of course.

bodger · Post by **bodger** » Thu Mar 06, 2008 6:46 pm

oops forgot that bit ...lol

dave350v8 · Post by **dave350v8** » Thu Mar 06, 2008 7:06 pm

Thanks for all the info, nail biting time nearly over!