I was just at the Fiat dealer and we were talking about the best way to run in my new 1.3 Qubo mylife diesel engine, I was quite shocked when one mechanic said "turn off the start/stop for the first thousand miles" and another mechanic agreed, two others did not and said "just leave it on".
Until today i had been driving with the revs low and in Eco mode (Dualogic box) as i thought driving it easy was best. What is everyones opinion?

Drive it as you'd normally plan on driving it. Long gone are the days of sitting at 40mph solid for the first 1500miles.

Just drive it with mechanical empathy

I wouldn't bother turning SS off. If this was a requirement it'd either be mentioned in the hand book, or programmed into the car not to work until after X number of miles

i would turn stop/start off as suggested as it will cycle the engine hot and cold when what you really want it to keep the engine running and get all the components wearing together.

I would still do as MEP suggested which is drive as you would expect to once you have a few miles under your belt just don't redline it the turbo will do bugger all till about 3000 rpm so you want to make sure you are at least reaching 3-4000rpm at times

Turn off the Stop/Start thats the first thing we did with my wifes new Ka. The best way to run in a diesel is to take it on a long long run. We used to put new tractors onto ploughing straight away and those diesel engines were far superior to the one the boss treated lightly.

Oh yes, DONT let the engine labour let it rev but dont over do it.

So what's the method behind everyone turning of SS

Foot to the floor everywhere for the first 1000 miles.
Contraversial but there are test that have been done doing this and the engine has maintained a higher BHP for longer. Something to do with everything expands and seals better on a new engine thats been chucked about rather than one thats just tickled with the throttle.
Will try and find the article/proof

Jonjo said:

Foot to the floor everywhere for the first 1000 miles.
Contraversial but there are test that have been done doing this and the engine has maintained a higher BHP for longer. Something to do with everything expands and seals better on a new engine thats been chucked about rather than one thats just tickled with the throttle.
Will try and find the article/proof

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I have done this to quite a few brand new cars when working in the trade it can and does make them go bang especially if the turbo is brand new and not run in you can wreck the bearings and oval the pistons

The best way to run in a modern car engine is to drive it normally but dont let the engine labour. I turned off the stop / start as I want the engine to run itself in not keep on stopping. Another tip is to take it on a long run, the longer the better. After a 100 miles shows on the clock get the engine to do a bit of work accelerating and on down hill roads try the engine braking. Have fun!

All these anti SS people on run in are still to advise why - there must be a theiory behind it surly

I think its about maintaining oil flow at all times. When the engine stops so does the oil pump and things begin to dry. in the first seconds after start up more wear will occur as a result. I seem to remember the advert for castrol gtx magnatech saying something along the lines of 80% of engine wear occurs in the first few seconds after start up.

Above is only a theory but makes sense to me.

jameshobiecat said:

I think its about maintaining oil flow at all times. When the engine stops so does the oil pump and things begin to dry. in the first seconds after start up more wear will occur as a result. I seem to remember the advert for castrol gtx magnatech saying something along the lines of 80% of engine wear occurs in the first few seconds after start up.

Above is only a theory but makes sense to me.

Click to expand...

From warm start with the durations that the engine will be off for with SS operating, there shoudln't be an issue with a lack of oil causing extra wear, this is normally only on cold start ups.