So, my car is doing something a little odd - the B6 S4's with the 4.2 v8 have a reputation for drinking oil (which mine does - a fair bit) but mine thinks it's low on oil when it isn't If the oil warning light comes on - it flat out won't go out until the oil level is a hair above maximum (I know about the overfilling warning). So what I'm actually asking is - is the oil warning light signifying low oil level? Or is it low oil pressure? For eg, Is my sensor slightly knackered in that it can't read the level right? OR Is it reading a low oil pressure (which would be absolutely disastrous) and the level is actually ok? Presently it get runs on whatever Castrol / Mobil that meets vag spec 504 - I however have 10 litres of Fuchs Titan Race Pro S 5W-40 Ester Synthetic that's going in at next oil change. So - upshot is - is oil warning level or pressure?