2013 X5 50 M-Sport PP "Engine Malfunction" MPG observation

[JCL]

Originally Posted by ard

Oh, if someone crashes into the SM while he is driving your car to or from service, or he is at fault and he crashes, you know its your insurance that is liable, right? Not that they are out to get you or anything....

Probably depends on your jurisdiction. Where I live, that would be covered by the garage policy. As long as they were driving the vehicle while there was an open work order on it.

When something happens and the DME detects the car is running dangerously lean, it selects a 'failsafe' mode. AKA "engine power reduced'. Not surprising a lean running car is using less fuel. It is running lean. It is not running properly.

Lean would be a possibility. But it could just be reduced power, less fuel, limited boost, all due to an emissions issue. The dash display does say it is OK to continue, so I don't think engine damage should be a real concern. Getting rear ended might be.

Back on topic: Should bmw make this a standard feature?

Just my opinion, but no. Consumers haven't historically paid much attention to economy modes. And if someone selects the 4.4 over the 3.0, they are even less likely to be interested. To the OP: I'll bet you can replicate that mileage just by moderating your throttle application, after the vehicle is repaired.