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Hard to tell from a close up shot.
All of the s54's I've dismantled have a coating of carbon on all of the piston crowns.
Try using a fuel additive like Techron more often. I throw a bottle in every oil change.
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2018 F30 320iX Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
2000 E36/7 Z3 Steel Blue
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