P38A Mileage Query

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
oakey said:
Why has mine suddenly dropped to 15 ish tho?
Puzzling
Click to expand...

check tyre pressure, when was the gearbox oild and filter last done.. diff oil ?

anything that gives resistance through the transmission and drivetrain will affect efficiency. as will the gold bars in your boot
 
I seem to recall reading somewhere that the average is a rolling average over a set number of miles so if it was doing predominantly long journeys then over the limited averaging miles is now into the short journeys, that could explain the sudden drop.
On mine, the readout gives around 17 on crappy hillly Czech roads and is actually doing about 15.5 when measured.
On the long motorway run mainly at 80mph the readout is just over 20 but actual is about 22mpg.
You need to do a brim to brim at same time as a reset before you start panicking about it being wrong.
Do it before a long run then also before a period of short runs and you'll get an idea where you are then.
 
Better do them over Xmas then ty Grrrrr
I have measured over short journeys and long ones inc motorway and still much lower than it has been for the previous three years.
Never done a brim to brim as not really interested in actual mpg, it is just the sudden change that is puzzling
 
oakey said:
Better do them over Xmas then ty Grrrrr
I have measured over short journeys and long ones inc motorway and still much lower than it has been for the previous three years.
Never done a brim to brim as not really interested in actual mpg, it is just the sudden change that is puzzling
Click to expand...
A binding brake is a common cause.
 
I thought maybe the handbrake but it seems clear
I I can figure out where it is and how, I am going to give the MAF a bit of a clean
 
046F2A84-D9D1-47C3-B989-A929E89EC25F.png
 
You must log in or register to reply here.

Similar threads

300bhp/ton
P38A 4.6 fault codes
Replies
14
Views
1K
Grrrrrr
Grrrrrr
MrJ191
P38 2.5 Diesel BeCM
Replies
4
Views
1K
Grrrrrr
Grrrrrr
D
TD5 injector disbalance / engine runs rough / white smoke
Replies
2
Views
1K
brianp38dse
brianp38dse
xDParis64
Freelander 1 Converting from wasted spark to distributor (or Visa Versa)
Replies
0
Views
362
xDParis64
xDParis64
D
TD5 white smoke / injector disbalance / running rough
Replies
5
Views
2K
Dirnie
D
Back
Top