i have a 1.8 8v mk2 gti and my oil light has been on since i've had the car, but no-one's been able to find anything wrong with it all... then last night as i was driving down a dual carriage way it started making a rattling noise and as i pulled off the engine jolted and cut out and i haven't been able to start since (just won't turn over)... do you think it could be related?
Thats what mine did last week!

Not entirely sure the exact cause of mine either tbh. I cant hear my fuel pump priming anymore, my oil temp was at 160 degrees, but my oil light didnt come up and now I have mayo in the expansion tank with a strong smell of oil, so think the headgasket has gone. And as the temp got so high, either my oil cooler has gone, or my oil pump, or pickup, or all, or some of the above!

I have just bought a new engine with all ancilliaries instead! 85 quid including delivery with 110k and full history, you really cant complain!