Help with OIL Warning 2003 A4 Cab 1.8T
I've read quite a few threads on the forum regarding the OIL warning, but my specific problem doesn't seem to add up to any of the standard scenarios. This is my first Audi, bought privately about 3 weeks ago.
On Friday I drove to Reading from Cheltenham, as I frequently do, about 10 miles into the journey the dash beeped loudly three times and a red warning saying OIL accompanied by a nice animation of an oil can appeared, almost as soon as I registered what it was, it went away again. Then once again about two minutes later it came on for about 10 seconds, then went away. I pulled over and looked in the manual, it said to check the level, which I did and it was fine (on the top end of the marking). In this scenario the manual said not to drive. Now I was in a dilemma, I didn't have breakdown cover (I do now!!) so I made the decision, that as the car felt, sounded and reacted exactly as normal I would continue the journey.
I got about another 50 miles with no incident and then the warning started intermittently coming on again, after about 5 mins of that, and 8 miles from my destination, the warning came on a stayed on. Not knowing anything about this problem, or even exactly what the warning indicated, combined with not having breakdown cover I decided to drop into the slow lane and complete my journey. Once again, there was no change in the performance of the car.
As soon as I got to my destination I got on Google and searched the problem, in the process I discovered this forum and read several threads on the issue. Which scared me.
Now I was faced with a problem, I was 70 odd miles from home with a car I should allegedly not drive (note, at this point I joined the AA! :laugh:). So I spoke to a mechanic friend, he said that if I'd driven the 8 miles that I had with a genuine oil system fault, I'd be the owner of a pile of scrap right now. He suggested a Wynns flush and oil change and see where that left me.
So I did. Flush, filter and oil change with fully synth 5w40. No sign of the OIL warning throughout the warm-up/Wynns flush cycle. The old oil that came out was in a bad way, thick like tar, black as the night and stuck like glue to any surface. Slightly annoyed as service history showed a full change less than a year ago.
Anyway, after the oil change I took the car around the block and had no issue, then this morning I drove the 70 miles home, motorway speeds, again no issue.
So where does that leave me? Should I now, as a precaution take the car in for a sump clean and pickup filter replacement, or is it more likely to be a sensor fault? I don't really want to do it right now as the car is due a cam-belt change later this year and it would be cheaper to do it in one go.
Another mechanic friend suggested that as the oil was so bad it will probably have coated the inside of the engine with crap, so I should drive on the current oil until it dirties, Wynns flush, drain and then re-fill and Wynns flush using cheap oil, then drain and fill with the good stuff. He reckons that would be the best alternative to a sump service.