golf said:
I happen to think the Yanks on AW and AZ know a lot more than the average UK Audi owner, so take that into account Mr Tamer.
<yawn> I suppose you think yanks are better drivers than Brits/French/German too!
I'll state again - the sludge issue in the 1.8 20valve turbo engines was soley caused by "users" on the North American continent refusing to comply with the strict requirements of the Audi/VW serving schedules - and also refusing to comply with the correct specification of oil. This is clearly documented and proven on a number of sites in the public domain.
When the "sludge" issue originally started to occur, Audi of America and VW of America initially covered warranty repairs on a "good-will" basis - but they also subsequently re-stated their oil specification requirements (by TSB), and would go on to subsequently deny any engine related warranty claim, in the event of non-specified oils being used.
If, according to you the Yanks were/are more knowlegeable than us Brits - why then, is that the sludge issue WAS/IS an endemic problem in the US, yet was NEVER an endemic issue in Blighty, and the rest of mainland Europe also?
golf said:
I'll stick to my oil changes at every 5,000 miles thanks.
Fine, good for you. Just don't try and force your personal preferences as the "de-facto" advice on oil change intervals in the UK.
However, in the UK and Europe, there is absolutley no evidence to prove any detrimental damage to the 1.8 20vt when used on the LongLife servicing schedule (usual common sense caveats, along with ensuring the correct spec oils apply). Providing that the car in question is NOT modified, and is driven within the guidelines of the LongLife regime, then the 20k miles for the LongLife servicing is perfectly adequate.
If, on the other hand, the vehicle useage does not meet the requirements of the LongLife regime, and/or the engine has been tuned for more performance, then the LongLife is NOT suitable, and the 10k miles conventional "time and distance" regime is more than adequate.
golf said:
And that link simply proves just how un-educated the Yanks are in relation to (a) the specific requirements of turbo engines, and (b) modern advancements of lubrication technology.
They clearly don't know know that a correctly specified fully synthetic oil will NOT break down from the heat generated in the turbo, even in an heavily modified engine!
They also fail to post any oil analysis data, which proves that the correctly specced oil has broken down before, say, 10k miles.
Furthermore, in the 43 posts in that thread, not ONE post mentions the vital OEM oil specification!
They basicically hark back to old-skool methods, when mineral oils were cheaper than bottled water, and changed their oils every 2-3k miles, just because the oil was so cheap! Unfortunately, old habits die hard.
Finally, they fail to even mention the most crucial factor - regarding the 5k oil change intervals as detailed in the TSB - that this advice was a remedial action only for those engines which had already developed sludge from prior use of incorrect oils. For engines using the correct spec of oil, and/or no evidence of sludging, the 10k interval still stands in the US.