[fuji]

Can anyone explain how this works. I went with my brother in law today to collect his new car. A Peugeot 307 SW Diesel. It states in the handbook that it should do 52.4 mpg. He put £15 in on the way back around 3 gallons. The onboard computer stated that it only had 25 miles left in fuel before we put in the 3 gallons.
After the fuel was put in the computer read 110 miles.
Now you don't need to be a mathematician to work out

£15 Diesel = 3 x Gallons or there abouts
3 x 52.4 mpg should = 157.2mpg+ 25 already showing on the computer. Total 182
How come the computer is only stating 110 miles. Are these things that inaccurate or is there something else wrong
If anyone has a clue please let me know.

Thanks

 

[andycoaching]

The trip computer uses the previous fuel consumption to work out the range, it can also be affected by the fuel gauge reading ie if it is reading low. If it is a brand new car it will need some time to come up with an average. I never use the range setting on my 307, just use it as a consumption guide

 

[fubar3803]

It also depends on the driving conditions, what roads ur on etc. M/way will get you 54+mpg but jump onto an 'a' road and it will come down to at least 25-30 mpg unless you use 5th gear for 30mph?

Peugeot are renowned for excellent mpg but are very susceptible to change.