I have a 1999 A3 1.6 Sport. I had a few instances of the oil warning light flashing at me for a few moments. I topped up with 3/4 liter of fullt synthetic oil (dealer initiated long life servicing during last service), dipstick read maximum. This morning the warning light came on again for a few moments. To the uneducated, me, this smacks of a dodgy sensor. Any thoughts would be appreciated.