Originally Posted by Dr Dave
Bugger me the money you're spending on analysis is going a long way towards the cost of an oil change!!
True but I'm looking at this as a learning exercise. The car is telling me I can go 17000 miles between changes. People who know more about engines than BMW tell me that this is madness and that 6000 miles is right. That is a massive discrepancy and I am a big fan of Scientific Fact so I thought for the price of a tank of fuel I could get a few samples analysed and learn the truth (or at least my personal version of it).