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Originally Posted by Rick in Prescott
If my math is correct 160KM per hour equates to about 99MPH
A new car with almost no miles on it, traveling at 99 MPH for extended periods of time = bad gas milage. What you don't understand? This thread has become a waste of bandwidth. Tell us what kinf of milage you get when you get 16,000KM on the X3 and start driving like you want better milage. Doing 160KM isn't going to give it to you.
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1st...the car had 400 km or more
2nd... nobody said extended. the oposite. here we dont have such long ways, and the trafic is alway bad. i was able to maintain it for max 5-10 mins, then down to 3500 then slowly back to 3900.
3rd... neither bmw nor dealer have a doubt on that ! manual says no more than 4000 rpm.
4th do you think that going low is better ? as a mechanical engineer I realy think that there is no prob at all. from one side the perfect machining of these engines, the quality of metals and the progress in lube oils will not do any harm at all.
To be honest with you, i dont understand that last 3 lnes ...!
why do you think that bmw gives you 25,000 km for the first oil change???
the times have changed. Let your car breath !!!