" Whats the best way to run in a new engine "

[AVI_8]

Whats the best way to run in a new engine???

I'm asking this question because i've seen it asked loads of times on different threads and I would like to add my own personal thoughts.

A few years ago I used to own a car rental company, all of the cars used to be replaced every six months, therefore I could'nt give a toss what happened to them after they were sold.

My point is this;

For my persional use I would use cars such as VW Golf GTI or VR6 and what I found on every occasion is that the cars that I used for persional use appeared to be faster after a few thousand miles than cars hired by the gereral public.

Therefore I would say that cars which were given a bit of "wellie" from day one seemed to be a bit more free reving and therefore faster than other similar cars.

My thoughts are that if you are buying a new car and only intend to keep it for a few years  then give it some stick from day one.

If I were to keep a car for longer then I may be more inclined to run it in, in a more convensional way, but my own experience is that the car will be slightly slower after the run in period.

So whats your experience folks, give it some large from day one or take it easy for the first 1000 miles.

Regards AVI-8

[RA Dunk]

ive never done it yet (touch wood []) but i heard its better to run it in gradually

[p1ggm]

i was told 3k for 200miles

then take it up 500 rpm for every 100 after that

 

car has been great and puts out good power for being standardish

[johnnyr6]

Tha harder you run an engine in the looser it'll be, meaning more power. This may lead to burning oil etc. and it wont last as long.

The oil used will also contribute to this.

It's a sort of juggling game getting a mixture of good power and long life, different people will tell you different ways to get this right.

[RA Dunk]

any of the more mechanical or more experianced guys got any info on how to do it properly?

[WUZ]

Take it easy for the first 1000miles on a scoob because they have a special "running in" oil that is a little thicker than water and is mineral based AFAIK. This helps to be the rings in properly. Once this is changd out start increasing th eload and rpm steady over the next 1000 miles. This is safe and still lets you have fun.

Russell

[iain_ogston]

I ran in an Sti v6 short motor recently.  Got the car back filled with crappy mineral oil as Wuz says.  First trip (200 miles) burnt a bit of oil and required a topup - after that rings sealed and no more oil was used.

Spent the first 1000 miles tootling about under 3000rpm and off boost.  Drove a lot on back roads (no dual/motorway work) so engine revs were constantly changing and also went over the lecht twice to work the engine.

Car went back for a flush and a refill with proper motorsport synthetic oil.  Then spent 500 miles going to about 5000rpm using reduced boost checking everything was ok.  As it turned out one of my new injector o-rings was leaky and petrol reached the oil under boost. Back the car went for another flush and refill.  So it was 1500 miles before I could use loads of boost or high revs.

Now enjoying 8000rpm and 1.5 bar

[WUZ]

Now that's how to do it. It'll bed the rings in nicely and car won't use any oil. Perfect!

Russell