E39 525i 19/20 mpg !

[Billy Greenbush]

I am currently getting 19/20mpg in a e39 525i 2003. I drive mostly urban with some motorway...am rarely in rush hour traffic and hardly ever drive in Dublin City centre . This mileage seems way too high

It's been services and has a new MAF. Any suggestions as to why I might be getting such low miles?

Thanks

[Gar]

When was it last serviced what was changed ?

Have you reset the trip ?

Should be doing an easy +25mpg my own is currently sitting on 28.8 avg

[Billy Greenbush]

When was it last serviced what was changed ?

Have you reset the trip ?

Should be doing an easy +25mpg my own is currently sitting on 28.8 avg

I had it serviced about 6 weeks ago Gar....just the basic engine oil, oil filter and air filter it says on the receipt.

I have reset the trip a couple of times. Have had a diagnostic done by logic automotive as he is refurbishing the ABS module. All that came up bar the speed sensors is a faulty positive battery connector - the red ine.it's reading 'resistance too high'

Couple of lads suggested change air filters and sparks next

[E46Padge]

I'd get a diagnostics ran on the car. It may be a faulty O2 sensor. Jap cars are mapped for 100 Ron petrol and irish is 95 Ron may be something to do with that but I doubt it.

[Billy Greenbush]

I'd get a diagnostics ran on the car. It may be a faulty O2 sensor. Jap cars are mapped for 100 Ron petrol and irish is 95 Ron may be something to do with that but I doubt it.

Proper diagnostic done ....nothing showing at all bar a faulty positive battery connector

The ABS module being refurbished now by logic automotive so speed sensors were coming up
[hr]

Seems a bit low alright. Thermostat could be failed.Your coolant temp guage should sit bang in the middle and not move when warmed up.

Should that show in a diagnostic ?

[kaveman]

Seems a bit low alright. Thermostat could be failed.Your coolant temp guage should sit bang in the middle and not move when warmed up.

[Johnnyghia]

I tip around the city and normally sits around 23mpg..

[Dave]

I tip around the city and normally sits around 23mpg..

I get 20

[JohnH]

I tip around the city and normally sits around 23mpg..

I get 20

I get 18!
I'd say a new set of spark plugs should help

[Valdelisbmw]

my auto diesel 3.0 did 22mg , foot to the floor and petrol wouldnt catch it :tounge: