Originally Posted by Nikos120i
Why are the pistons so dirty?
Is it because of poor petrol quality?
I doubt it very much. I have always used Shell V Power 99. I always went out of my way looking for a Shell garage for refuelling.
I did wonder the same thing though, I think it may be because the car was misfiring this may have caused the black staining. The oil was changed not long before the car was scrapped.
New Company car 2011 BMW F10 520D SE Xirallic Imperial blue/Cinnamon Brown 6FL USB, Front Sports seats, Sports steering wheel, Xenons - Arrived 3rd Dec 2010!
Scrapped RIP 12/08/2010 - E90 320si - Le Mans Blue - Totally standard specification
Long gone - 00 Peugeot 306 2.0 SE Cabriolet, 94 Rover 214 SEi, 91 Fiat Uno 60S Mk2