Being of sound body
AO Platinum Member
Join Date: Mar 2006
Location: United Kingdom
County: Greater Manchester
Re: Fuel Consumption - Computer or Measure?
I do the same as you Fraser. Always brimmed and I've kept a record for the last 67k with my Mazda 6 diesel for work.
The computer is 15% or more out -consistently over-optimistic, once resulting in me running out for the first time in my life because it claimed I had 96 miles range left.
My spreadsheet shows improvement as mileage has built but I get a fraction over 40mpg while it claims upper 40's (46-47 from memory).
It has done better on odd tanks when I've taken my time but I tend to cruise a bit to fast for economy on the motorway most times.
Nostalgia isn't what it used to be.
2008-15 New 159Ti experience: overwhelmingly positive. Reliable and fun over nearly 100k.
6/9/12 - 15 New Mito 135MA Distinctive - 100% reliable 37k