MPG - does this sound right?

[talkingcars]

I had an interesting though regarding mpg and the apparent fuel consumption of my 180 according to my scan gauge.

I always thought the read out was low due to the scan gauge mph reading being slightly out. I adjusted it the other day using my sat nav but the mpg still seemed low.

I then realised that a US gallon is smaller than a UK gallon!
This much smaller - 1 gallon [UK] = 1.200 949 925 5 gallon [US, liquid]
so I need to multiply the scangauge mpg by 1.2 to get the correct reading.

Huffy is correct, to get an acurate fuel consumption reading you need to brim the tank, any other start point can not be measured that accuratly.

You will definatly get a better fuel consumprion at slightly lower speeds, below 3000 rpm is normally good in a petrol car. Also avoid hard acceleration and braking by planning further ahead.

[acemodder]

Originally Posted by talkingcars

I had an interesting though regarding mpg and the apparent fuel consumption of my 180 according to my scan gauge.

I always thought the read out was low due to the scan gauge mph reading being slightly out. I adjusted it the other day using my sat nav but the mpg still seemed low.

I then realised that a US gallon is smaller than a UK gallon!
This much smaller - 1 gallon [UK] = 1.200 949 925 5 gallon [US, liquid]
so I need to multiply the scangauge mpg by 1.2 to get the correct reading.

Huffy is correct, to get an acurate fuel consumption reading you need to brim the tank, any other start point can not be measured that accuratly.

You will definatly get a better fuel consumprion at slightly lower speeds, below 3000 rpm is normally good in a petrol car. Also avoid hard acceleration and braking by planning further ahead.

The motorway journey to work and home I'm normally at around 3.6-3.8k rpm. Maybe try slowing a little bit for a couple of days....