Strange looking wear on my 5.9 cylinders

run it. quit coffee and put that in a jar. In a year, youll have enough to get +.010 pistons and a bore job...but you wont feel any difference till then. Your that far in, remove the piston and check the rings. at least clean them out and position the gap away from that scratch. Knock that bugger off the piston top with a file so it wont cause a knock.