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Originally Posted by YANNIS
I Tested Again This Weekend; And With D In Highways I Can Have 3800 With About 140 Km ! I Dont Know Which Gear It Uses, But Thats What I Can See. I Think Consumption Started To Go Down.... I Did See An Improvement At 1000 Km. Why So Much Surprise For 4000 Rpms? I Think That Even The Manual Considers 4000rpm As A Safe Max Limit. I Ll Check Again Tonight But I Am Sure. Shall I Mention That I Am Not Talking About Diesel Engine?
Thanks/reverting
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People aren't questioning that 4000 RPM is a "safe limit" (everyone knows BMW engines can safely rev far higher than that). What people are questioning is whether your car is in the proper gear when you are driving at that speed. It sounds like it's not in top gear. Try putting it into manual mode and making sure it is in top gear at that speed, then check the RPM. I find that ours often shifts down and holds a lower gear when it doesn't need to, and I will manually shift it to the highest gear to keep the RPMs lower (and get better fuel economey).