Very poor mpg 230K - 99
 

Hi all,

I need some advice concerning my '99 230k. It's been a great car but for the last 5-6000 miles the fuel economy has dramatically worsened. I'm getting about 220 miles out of a tank instead of 300 on the same roads and driving the same commute. My local garage is a MB Independent, and he's replaced both the MAF and the Lamda sensor but with no luck. Any ideas what I should be looking at?

I've minimised the other variables by using the same fuel from the same pump and driving the same route, filling to the same level each week.

A seperate fault (it may be unrelated but if you guys have any thoughts I'd be interested) is that the Oil Level light will come on for about 5 minutes during most journeys, normally some way into the journey. There's a normal amount of new oil in the car.

Thanks,

Steve
Hampshire, UK

RE: Very poor mpg 230K - 99
 

Hi,
Are any codes present even if the CEL is OFF.
Stuart.

RE: Very poor mpg 230K - 99
 

Thanks Snancki - by the CEL are you referring to the ignition switch? Forgive my ignorance....

:-) Steve

RE: Very poor mpg 230K - 99
 

CEL = Check Engine Light.

The codes stored in the OBD On Board Diagnostics is the starting point. To read these you need a scanner or a trip to your dealer.
Stuart

RE: Very poor mpg 230K - 99
 

Check aircleaner for dirt and inlet for a dead bird[&:]

Bazzle

RE: Very poor mpg 230K - 99
 

Mine does about the same....then again I live on windy roads and my right foot is a bit heavy at times!