I work for Mercedes and most of our techs are not to happy with the FSS extended oil changes. My wife's car is a FSS car, but its also a lease, so I know I am servicing it to MB's specs, but we wont keep the car. On my older Mercedes I change the oil about every 2500 miles using Mobil Delvac 1300.



Terminator

02 C240W 15K
89 300SEL 163K
83 300TD 190K

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Mike

90 300D 511k
95 C280 133k
14 BMW 528i