yeah, probably putting a bigger load on the engine @4250rpms, wind resistance increases at the square of the speed, the smart is loafing along at 3000rpms @ 60mph, that's why the smart gets over 50mpgs @ 55mph on a level road and drops to the high 3…
In the Horsepower Comparison Chart below you will see that the Smart recommended Mobil 0 W-40 is the smart oil for your Smart...
~Oils Against Oils~I think you guys will like the read~
http://www.performanceoilnews.com/oils_against_oils.shtml
Note…
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