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      05-10-2013, 08:22 PM   #31
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Quote:
Originally Posted by floydarogers View Post
It isn't politics so much as need: most of the US isn't cold enough to require higher cetane to help while starting. And after the engine is started, cetane appears to have little or no effect on mileage or power.
Which would explain why most of the "premium diesel" is located in the northern tier states. But it does not explain why the party line for BMW is to run 51 cetane or higher.
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2021 X3 M40i: M Sport Differential, Adaptive M Suspension.
Previous BMWs: 1971 BMW 2002, 1973 BMW R75/5, and 2011 BMW 335d
Previous Other Vehicles: '67 Cougar, '70 911e, '86 Jetta Diesel, '05 and '12 Foresters, et al.
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