What's pictured are oil samples from 3 different m54 engines. Important to note this oil has not been changed in13 mos.to date on each car (e83) 04,05 and 06 years.
For that year period no car is over 6800miles...can you find the cleanest of the oil pictured?
Do you think it's time for an oil change?
If not, how much longer for the next oil change?
Finally, what brand and type oil is it?
.
Sent from my SM-A102U using Tapatalk
5w40 Castrol euro changed out at 7k