Running In Oil

[Willie.]

Any experience of Millers Competition Running In Oil?

 

Mate is just about to fire up his K Series and is wondering what the consensus is on how many road miles to run it for?

 

Thanks,

 

Willie

[Jerry Auton]

After having the bores honed & new forged pistons fitted, Dave Andrews (DVA) suggested 500 miles & then change oil & filter before RR mapping.

[skydragon]

Everyone will have a different opinion on this one

 

I've used Millers running in oil....good stuff! Seems to be widely used in motorsport.

 

Around 500 miles minimum seems to be the general concensus.

 

Make sure you don't let the engine run at tick over, or stand idling, or you risk glazed bores.(I'm presuming it's a new engine or and old engine with new rings/bores?)

 

Best bet is, start her up and imediately start driving. Take it easy until water and oil temperatures are hot and then give it some beans. You want to be on and off the power frequently, not staying at a constant rpm. I took mine onto the motorway and put foot to floor until around 6000rpm then off power completely letting the revs decrease to around 3000rpm, then repeat and repeat.

 

Again, when you stop, don't let the car stand idling.

 

What you don't want to do is drive it gently (but don't thrash when cold). It's the opposite of what most people think when 'running in'

[skydragon]

I still had my running in oil for the RR session. Makes no odds.

 

Bear in mind that most race engines are built and then run in on the dyno, using running in oil. (ie, they are run in at high rpm and high loads, after some initial tests)

[Willie.]

It's in a refreshed engine with honed bores and new rings, trying to get them well bedded in.

 

Thanks very much for the feedback, I'll pass that on (Although he's probably already read it!).

 

I think the best bet is that he lets me run it in... 😬