Mpg drops on idle ?

[rollerdan]

Today is discovered that my mpg drops on idle i was getting 32 mpg once i was driving but left on idle for about 10 mins it went down to 19 mpg is this normal or is somthing wrong thanks

 

[Keith Lemon]

Well your using petrol and not doing any miles, so I would say so yes lol

 

[Russ_16v]

Yes, engines are uneconomical on idle

 

[rollerdan]

Ah right okay but my mate Has the same car but his does not drop

 

[Brett]

Yes because on idle you are doing 0 mpg. It will show up a lot particularly if you have only recently reset the trip computer. If you've done a few hundred miles and its dropped that much in 10 mins then something is broken. I know 1.2 Clio's use about 2 litres of fuel an hour on idle according to the dash test trick.

 

[Jardo]

Really?!

Ah right okay but my mate Has the same car but his does not drop

Trust me, it does. The engine is running, and you are not moving. Regardless what car you drive for every second you are sat idling the car will have a lower average mile per gallon...Because it is doing 0 miles per gallon at that point.

I enjoy how uneducated people coast up to junction and roundabouts, or down hills because they think it will conserve fuel.

 

[Djw John]

Im gonna guess your mate hasnt reset his mpg counter for ages, however if he left it idling long enough then it would drop. Idling means youre getting 0mpg!

 

[rollerdan]

Cheers for the response guys , glad its nothing to worry about . Thanks

 

[Bluebeard]

I can't believe you had to ask the question.

 

[Keith Lemon]

I can't believe you had to ask the question.

+1 to be honest, this forum has gone mental of late.