Anyone tried this service thing? What did people think?

Not tried it myself, but the BMW people seem to be quite happy with it on the whole.

Having seen before and after emissions tests (assuming they're not faked) it certainly cleans those up well.

Any idea on costs for getting it done?

Well that's the thing. I can't find any prices quoted. But it it does everything it says it does then its giving your WHOLE engine a new lease of life

What is it?

I think it changes based on engine capacity, so I'd expect it to be a little cheaper, but I think I read for my car (3.0 6 cylinder) it's about £85 inc. VAT. I think the 320s are more along the lines of £70.

If you go on their website they've got a list of dealers or a 'contact us for a dealer' style section.

Aye there's loads of places to do it now

i wuldnt !!!!! theres a reason why your engine has deposits in it this things flushes them all out not a wise idea for me

i thought about it but it the same as engine flushes people complain about them this is the same only more intense

I thought terraclean was effectively a decoke, i.e. gets rid of all the built up carbon deposits in your engine's induction, combustion and exhaust track where as engine flushes are a completely different scenario applied to a different part of the engine and supposedly clean your lubrication system out so it's not the same?

The old 2 stroke bikes I had as a young pup certainly went a lot better after a decoke, so I don't see how terraclean would harm the engine as it's performing the same function.

I wouldn't disagree with you about avoiding engine flushes though.

Yes as said, this is a chemical decoke covering the induction tract from the injection point inwards, though I'd doubt if it would clear the bulk of the nasties clogging the inlet manifold or the area around valves - unless this treatment was carried out every year or two. What it should do for petrol engines that seem to run dirty like these VAG engines do, is clear away some of the carbon build up that leads to pinking. I have filled in the on-line form and have been advised of where my local operator is - but have not done any more so far. This think that this treatment, which has come from USA, will have its roots in there being a trend for engines to generally clog up quicker now due to emissions control - or something! Any old timers would say that the days of the annual decoke are gone for ever, well I think that they have come back and this treatment is probably safer than any alternatives that involve blasting "stuff" into the precombustion areas while the engine is still in the car. For direct injection engines, I think there will be an option to inject this modified fuel earlier in the induction path - or the induction tract will not get cleaned at all.

i wuldnt !!!!! theres a reason why your engine has deposits in it this things flushes them all out not a wise idea for me

i thought about it but it the same as engine flushes people complain about them this is the same only more intense

Engine flushes, using only something like Comma Easiflush, should not cause any problems if used regularly from an early stage, lots would say if they are a bit benign then they will do nothing - better to use higher quality oil, I use high quality oil, change it every 12 months or 10,000 miles, but always add in Comma Easiflush roughly 100 miles before oil change as I feel that it might help get a lot more of the accumulated varnishes etc into suspension in the old oil and so dumped out. To work out if this method is any good would need you to own two identical cars and only treat one, I'll not do that, I'll just keep adding flusher in before an oil change.

Though you will be correct if you bought a car with poor service history and lots of miles - then flushed it with some extremely aggressive flushing agent to turn the clock back - that could lead to blockages in some oil ways and maybe some unexpected oil leaks.

I spoke to a guy on their stand at the Autosport show, and mentioned I use Millers additive. He basically said his product would be pointless as Millers does a very simular thing.

So using performance fuels (VPD etc) and/or Millers, (or other fuel additives) will be far cheaper and give the same benefits.

I'm not convinced on how the terra clean works, especially on Direct injection engines

That's good to know cause I've been adding millars to normal shell in my CR to try and make it run cleaner to help the DPF, so looks like I'll benefit in more ways than 1 and it only adds around 2p to the cost of a litre of diesel too. Get mine off ebay as it's cheaper than halfords and a lot cheaper than using vpower etc.

I've cleaned my egr but still want to terraclean

I'm not convinced on how the terra clean works, especially on Direct injection engines

Spot on regarding the DI engine, it will not clean the backs of the inlet valves where the carbon build up is an issue.

On an older inlet manifold injected engine it will work as intended, just not on a direct injection engine.

To me it just seems there messing with engines far too much .. Yeah keep it clean egr , inlet etc and well serviced but I think messing with a run in engine too much is just asking for trouble and as said above its come from the yanks with there big v8's not little 1.9 diesels plus how many times has the Americans actually gotton somthjng right lol ..

To me you can't beat a good old fashion elbow grease

But how can it reduced emissions so much?

I think it will be snake fuel, I tried bg44k on my petrol car after a 1k not a ****e of difference, I pulled the plugs and looked on top of the pistons as they said it would clean them, it did nothing.

Just service the car properly and when intended and use good fuel, I do believe in Egr deletes and cam case breather pipes etc though.

I think that I read somewhere, that due to the issues folk are reporting back to their VAG dealers with mainly FSI and now TSI (DI) engines getting caked up with probably being used on short runs and using low quality (supermarket?) fuels, VAG have "designed" a process to remove enough of this coke on the inlet side by effectively blasting the inlet and outlet areas of the heads while still fitted into the car - ie remove manifolds and replace with blasting adaptors and blast with something like coconut shells. This method will still be expensive, but not as expensive as stripping the engine down. I'd image they would compliment that procedure with running something like the Terraclean "fuel" through to clean up the combustion area. I can't remember where I read that, but it is mainly a fix for UK cars, maybe the continentals either use their cars properly (or use public transport for short journeys, or cycle or walk!) and/or use proper fuel - and there is the issue with higher ambient temperatures in Southern European areas.