BHPvstorque

iTrader: (14)

Hello
I am presently getting an engine rebuilt 2.1 stroker. I have some Miller's 10w60 but do I put that straight in or a different oil for running in ? Any recommendations ?
Cheers
Kris

stonejedi

iTrader: (51)

Talk to the builder of your engine and ask for his recommendation,usually it's just a basic mineral based oil for engines.SJ.

jason_2013

As above use a mineral oil for the initial running in period. Millers sell a mineral running in oil

Blue by You

iTrader: (23)

After speaking to Paul B. I ran my Zen motor in on Halfords cheap chip oil.

silver6933

1 check with your builder

2 Do not use any synth oil during the break in.

I recommend SAE40 for first 100 km. change after 100km and then switch to a high quality dino oil.

Then at 2500km , put in what you need

Steve Whitehorn

iTrader: (13)

All depends on the tolerances
On a standard engine - mineral oil
On a more expensive forged lump with tight tolerances - you can use Semi Synthetic

Do what your builder recommends
Running in mileage varies
It is important to put the engine under load during running in.

Infected by sti

iTrader: (6)

Cheap oil and light driving for 50/100 miles

Drop it out, decent oil in and let it have it.

1000 miles later drop oil refresh and happy days

Never failed.