so when is the engine 'run' in as such??

what sort of mileage

5K its getting looser

7K you should feel a difference (I did)

10K should be pretty much bed in (not reached it yet)

100K at this mark, for a diesel its probably just fully bedded in

It's a myth that newer higher performance diesels will in reality outlive a convential N/A petrol engine, let alone the turbo...

The turbo won't outlive it but I still don't think it's a myth - main reason being the lower revving nature of the thing. It's the reason why a 1.1 petrol engine with 100k on the clock is pretty worn, whereas a diesel (probably 1.4 I guess, equivalent) would not struggle to double that.

The drive shafts and other rolling parts still fall to bits though, and may go sooner on a diesel with all that torque if they've been specced on the limits.

With a remap you sure shave off a fair bit of lifetime though, and you'll wear out the turbo more I'd guess - that said you'll enjoy the drive more

maybe i should keep a car for 2 years then :(

I read an article in 'Diesel Car' mag yesterday and one of thier 'experts' was replying to a letter regarding the reliability of turbo's in diesel vs petrol engines. Now, whilst the 'expert' said that turbo's in either engine should last a while given correct servicing etc he DID say that in his opinion diesel engines are "much more robust than petrol engines". Thus, they should last longer.

They have to be tougher to take the fuel from the dirty black pump, and all that torque they pump out. The low rev nature and relative lack of heat also help. I certainly would not bet against your average 1.9 TDI engine lasting a lot longer than say a 1.8T. They are very, very strong engines - I've heard of examples pushing 400k miles.

The reason the engine's last longer and are heavier is because they are built to withstand greater forces, petrols are flimsy in comparison - just look at HGV's - over a million miles in examples I've seen!

5K its getting looser

7K you should feel a difference (I did)

10K should be pretty much bed in (not reached it yet)

100K at this mark' date=' for a diesel its probably just fully bedded in [/quote']

Wait for the 10k oil change, then if it's anthing like mine, you'll notice it's a lot happier right across the rev range, and not just when the turbo's blowing. As far as longevity is concerned, I think it works both ways. I'm sure Honest John's mentioned a Fiat Panda 4x4 he knows of with something like 500,000 km on the clock (could be wrong there), and although I bet it ain't been molly-coddled, it would be a low-tech engine so likely over-engineered with it. Even so, I reckon that although modern engines may well run nearer the maximum parameters of their designs, the improved materials and manufacturing techniques ought to mean that a properly maintained engine (diesel OR petrol) and transmission should be good for at least 200,000 miles.

At over 20,000 miles per year, I'm hoping so!

okay, so back to my question, lol

when can i start taking it past 3500 rpm kinda thing? and using full throtle?

okay' date=' so back to my question, lol

when can i start taking it past 3500 rpm kinda thing? and using full throtle?[/quote']

Depends...

If you go by what the manual says, you should start heading in that direction after 600 miles or so, and can go flat out after 1000 (or may be 1500 - you'll have to check).

Others here (myself included) advocate the 'Honest John' technique, which requires a bit more restraint, but seems to be worth it. I can't be @rsed typing out all out again, so you can click here instead!