My M30 uses 20.5L/100km (11.5 miles a gallon)

[F4Phantom]

I know this is basic but make sure you are not driving around with handbrake partly on or brakes binding, or with big load on board eg. several bags of cement in boot, mother-in-law (sorry, old gag).
Also that fuel consumption would not be bad if all your driving is in ridiculously busy stop start traffic where you spend a lot of time idling.

Bill G Melbourne Aus

Nah I am really careful with the basics like that. The car gets driven very easy and although does have a couple of kids in the back I am not sure this would account for nearly half the economy of others here.

BTW does this engine had 2x sensors, one before the C-Converter and one after? or is it just the simple procedure of replacing this

Oxygen Sensor
C5010-33552
In Stock Bosch (OEM) $189.00 $113.13

Thanks again.

[Adnan]

BTW does this engine had 2x sensors, one before the C-Converter and one after? or is it just the simple procedure of replacing this

Oxygen Sensor
C5010-33552
In Stock Bosch (OEM) $189.00 $113.13

Thanks again.

The M30 has just one O2 sensor. It can be a bear to remove, however.

My '91 M30 gives me 20 mpg with a 50/50 mix of highway and city. Have you considered that you may be driving the ol' E34 as fast as an F4 ? On mine, the fuel consumption goes up significantly at 70 MPH versus 50 MPH.

Regards,
Adnan

[F4Phantom]

The M30 has just one O2 sensor. It can be a bear to remove, however.

My '91 M30 gives me 20 mpg with a 50/50 mix of highway and city. Have you considered that you may be driving the ol' E34 as fast as an F4 ? On mine, the fuel consumption goes up significantly at 50 MPH versus 70 MPH.

Regards,
Adnan

Yeah I dont think so, I like to give it a good rpm range occasionally but it is mostly my wife driving local trips. She drives very easy. Also the previous owner kept huge logs and always averaged 12.5L. The only main change I have made is a new tranny but I cant imagine a new/rebuilt tranny could add fuel like this - or perhaps the new tranny needs to be worn in? and loosen up a bit, cause if it does then the 'driving with handbrake' idea could be actually happening through the tranny. Either way my 02 sensor (lamda) is getting replaced.

Some of these replys I am having a very hard time understanding, and its even harder to just accept them as jokes because they are not funny. I recon if your trying to be funny, because there are no facial expressions to detect you need to be extra funny or poeple like me become confused on so many levels!

[Qube]

That's absolutely horrid. With A/C on I get at worst 16L/100KM