200tq oil pressure puzzle

can anyone help with a strange problem i am having with my 200 turbo it started one morning on the way to work i started my car drove off but noticed my engine sounded
rough seconds later my oil light came on i was almost at work by this time so i carried on (yes i am stupid)at dinner time i checked my dipstick level it was ok when idrove home every thing was ok again no oil light engine was quiet decided to do an oil change at weekend the next day there was no oil pressure again so i left car at home ..As planned i changed my oil and filters every thing was fine again till the next morning (no oil pressure)something told me i may have been given the wrong filters so i changed them (from different supplier)engine ok again some 6 hours later i started the car up no oil pressure again i checked the oil pressure releif valve it seemed allright then out of curiosity i refitted old oil filter everything ok again till next day same problem! i would be gratefull for any suggestions cheers. ps: manual suggests bypass valve where is it or is it part of filter. pps: pardon my grammar.
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Michael, Was one of the filters orange in colour? There have been reports in audifans.com about filter element implosion in some orange filters - resulting in major engine damage. Apparently, although the crossref. chart at the FLAPS (friendly local autoparts store) says that they work for the 10v/20v engines, they actually cannot handle the high oil flow rate and the paper element implodes as a result, often with paper bits travelling into the oil passageways in the engine. Hopefully you were only using Mann/Bosch filters from the dealer, right? Cheers! Steve Sears 1987 Audi 5kTQ - has a FRAM quick oil drain plug - it has an orange tube...how odd. Bosch/Mann filters always. 1980 Audi 5k - bosch filters always 1962 and '64 Auto Union DKW Junior deLuxes - oil filters? why? (SPAM Blocker NOTE: Remove SHOES to reply)

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chears steve i now have sump of cannot blow compressed air through oil pumpwhith pick up pipe removed nor can i blow compessed air through from filter fitting so you could be right let you know what happens when i take of oil pump . thanks again

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