our mercedes goes in about every 8mos (~11kmi) for an oil change (synthetic). the car's computer keeps track of useage and driving style to predict service wear. i've changed teh oil in my accord every 7500mi (per the owner's manual) with mobil1. oil changes color fast, but it doesnt mean it dirty or not working. its never gotton really dark ever. 125kmi and going strong.

100kmi tune up intervals dont include regular maintainence, like oil changes, air filters, etc. the "tune up" is basically valve adjustment, spark plugs, wires, etc. northstar engines have had 100kmi tune up intervals since 94. u really dont need to service the car until the manuf. reccomends it