Why is my MPG so low?

[ThomasBrentnall]

Hey, I have a 1.2 16v and only seem to be averaging around 39mpg on a long run (it's a 50 pretty much all the way). This is my commute to work so there is no heavy right foot involved as I want to spend as little money to get to work and back, just a nice smooth drive there and back

Cheers

 

[Beasley Clio182]

2bh mate i think thats about right , if you want more than that id say your better looking at a diesel buddy

 

[ThomasBrentnall]

2bh mate i think thats about right , if you want more than that id say your better looking at a diesel buddy

Ahh cheers, I forgot to mention my old clio 1.2 16v hit about 45mpg. And I've seen sports (MK2) get about what mines getting now

 

[The_Pirate]

1.2's are not the best on mpg to start with mate, 1*2's acheive similar figures from not much effort.

 

[ShaunL]

What year 1.2 do you have? I'm currently running around in a ph2 1.2 and I'm regularly seeing 45mpg+ on my steady commute (certainly more than my 172 on the same run)

 

[ThomasBrentnall]

What year 1.2 do you have? I'm currently running around in a ph2 1.2 and I'm regularly seeing 45mpg+ on my steady commute (certainly more than my 172 on the same run)

Mine is a 04 model. Old one was a 51 plate (which saw 45+)

 

[ThomasBrentnall]

1.2's are not the best on mpg to start with mate, 1*2's acheive similar figures from not much effort.

If only I could insure one

 

[ShaunL]

Mines a 53. Doesn't sound too low really. Mpg can be affected by number of things. Weather/road conditions etc. Are your tyres the correct pressure? boot full? Has it been serviced?

 

[ThomasBrentnall]

Mines a 53. Doesn't sound too low really. Mpg can be affected by number of things. Weather/road conditions etc. Are your tyres the correct pressure? boot full? Has it been serviced?

Ahh cheer! Well tyres are correct pressure, serviced about 3 months ago. Boot had a vibe CBR 10" subwoofer but this was in my old clio that got better mpg. Does the pre cat sensor affect mpg on 1.2's?

Edit: I should also add my coilpack died and I had a new one fitted however it was dying for around 1 month. Could all of the unburnt fuel being dumped into the cat effect it?

 

[ShaunL]

Yeah a faulty o2 sensor or coilpack would affect it. Are they working now? checked your spark plugs? Ever been changed? and are they the correct ones fitted

 

[Dan519]

39 is pretty decent for a 1.2 16v. Have you noticed getting less miles from a tank, or just going by the dash? if you're genuinely getting less, then have the brakes looked at. If they're dragging it will hurt your economy

 

[ThomasBrentnall]

Yeah a faulty o2 sensor or coilpack would affect it. Are they working now? checked your spark plugs? Ever been changed? and are they the correct ones fitted

Yes coilpack is fine now. Also the sparks was replaced 3 months ago (when it was serviced). Spark plugs are NGK and are the correct ones for my car. Cheers for the help btw.

 

[ThomasBrentnall]

39 is pretty decent for a 1.2 16v. Have you noticed getting less miles from a tank, or just going by the dash? if you're genuinely getting less, then have the brakes looked at. If they're dragging it will hurt your economy

I've noticed that I'm getting less from a tank, about 230 miles to £40.00

 

[benn j]

I've noticed that I'm getting less from a tank, about 230 miles to £40.00

that's roughly what I got when I had my 1.2 16v I did have a de cat on mine tho ...
I found I got better mpg when I got my k&n panel filter

 

[mozzer_morrey]

I'd be happy with 39mpg from a 1.2 16v. My 1.4 16v only gets 34mpg average and i have never seen it above 38 on a long motorway run.

 

[Rumface]

That is surprisingly low, my 1.6 16v get an average of 40 combine run. I've even managed 43 mpg before too.

 

[TheEvilGiraffe]

I've noticed that I'm getting less from a tank, about 230 miles to £40.00

What actual MPG are you working out though ? Can't compare it on price as fuel constantly changes.

 

[Carlv8415]

My 16v 1.2 I was filling up £50 so about 37 litres and was getting 250! What works out about 30mpg! It was a combination of heavy right foot but mainly faulty lambda sensor!

 

[ThomasBrentnall]

What actual MPG are you working out though ? Can't compare it on price as fuel constantly changes.

Price around me was 131.9, has just gone up to 133.9. But I'm using the computer in my car to work it out. I only fill the car once a week which makes it easier to work out as its always a set £40.00 each week.

 

[ThomasBrentnall]

My 16v 1.2 I was filling up £50 so about 37 litres and was getting 250! What works out about 30mpg! It was a combination of heavy right foot but mainly faulty lambda sensor!

Have you sorted the sensor? and has it improved it?

 

[The Fatty]

Our 1.2 TCE only gets around 39/40.

 

[ScottL]

My 1.2 16v only averages 23mpg un town and around 33 on a run, was serviced 3 months ago, got correct plugs and oil. Any ideas as to why its so low? Not got a heavy left foot as its only a 1.2 also no faults showing.

Its a 51 plate

Cheers Scott