On 30/06/2018 21:00, Jim K wrote:
Wrote in message:
Thanks all for your help. To answer a few questions and add some clarity.

It is a petrol Audi A4 s-line 1.8 turbo which has done 125k miles so likely the engine is a bit worn. It had always used oil but not to the current extent. Besides the cost there is always the hassle of constantly topping it up. When the oil pressure sensor detects you have forgotten to top it up and you are in the middle of nowhere and you realise you forgot to top up the spare can in the boot. All a bit of a PITA.


Istr the official "fully synthetic oil from new" regime has been
implicated in this excessive oil consumption. Something to do
with the piston rings not getting a chance to bed in
properly.

Certainly true that fatty acid impurities in mineral oil may help
running in. The advantage of fully synthetic is that it degrades less at
the higher temperatures of modern engines.

Also the timing chain & tensioner does not like low oil levels
with potentially catastrophic results.

Does the warning you see on the dash relate to oil level & not
pressure? The latter could open a whole different kettle of pish
:-(



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