182 : MPG drop

[fizzy_drink]

My MPG has taken a dive...

Consistently (with tyres inflated according to Renaults recommendations), I've been getting 33.7 MPG (calculated from fuel receipts) on motorway journeys (speed 78MPH or below).

When I first got the car, the same motorway driving used to get me an extra 4-5MPG (so closer to 40).

So, now I pay £41 to fill-up, and I get just under 340 miles out of it (fuel light on for the last 40miles).

Could this be anything to do with the famous temperature sensor problem I've had in the past (which is now actually reading correctly). Ie: Could the wiring/signal still be faulty despite the dashboard gauge reading correctly?

Tracking is spot-on. Car unloaded.

Can't think of any other reason.

Oms!

 

[Macca172]

Weird that you mension this Oms, I used to get about 35 - 36 mpg driving backwards and forwards to work, since I had the car serviced (36k) the mileage has dropped to around 33 - 34 althought sometimes as low as 30 driving the same journeys, same speed, etc... only a slight drop, but weird that it decreased after the service.

 

[msa197]

Cold weather could effect this, maybe?

 

[Clart]

My 172 costs about £39 to fill up, and i can do around 350 miles on that (mpg dropping to 28 at one point lol)

 

[Munday]

I think it might be the weather that is causing this. I only get 33-35mpg now when driving within speed limits and not ragging it. A few months back I was get 37-39mpg, it might have something to do with perhaps using the lights, heater more?

I did see 45mpg on the dual carriage way the other night though - very strange!

 

[ben_p]

god i wish i saw the 30 mpg mark, it seems to be stuck on 25.7 all the time, it does get hammerd though

 

[Chris n nic]

I have always used optimax but recently changed to Total 98ron (as there are no Shell garages for miles) and my fuel economy was 28-29mpg (not motorway miles for me). I assumed this was due to my new engine but I thought I`d try and go back to Opti...my mpg has gone up to 31-32 pretty much straight away..I wasn`t sure b4 but I`ll be using it from now on (91p for the optimax and 97p for total)

Chris

 

[Rhys182]

Yes the colder weather will affect your mpg. As it takes that little bit longer for the engine to get to operating temperture (and it is in this time that a car is something silly like 70% less efficient). Also, having heaters, lights, on more constantly as mentioned will also bring mpg down (only very slightly-but it all adds up unfortunately).

A few pointers:

Make sure the tyre pressures are as recommended in the car’s handbook. Wind resistance and drag mean that if they are 4-6psi below the correct pressure, fuel use suffers by 2-3%. Low tyre pressures compromise safety, too.

The AA claims 20% of motorway drivers travel at more than 80mph. Cut that to 70mph and you save around 40p every 10 miles.

 

[Spammy]

I get 28mpg in my 1.2!

 

[Leeshez]

I get 32-35 MPG i have done nearly 7K

 

[oneeighttwo]

I get 19.5 MPG

 

[blink172]

Seems that most of them take a drop once they are worn in properly +10/15k. Maybe get a service and see if that make a difference.

 

[W3eeb]

LOL u guys 300 miles from a tank... pah! i get 200miles from 40 notes! drive it like u stole it!

 

[oneeighttwo]

LOL u guys 300 miles from a tank... pah! i get 200miles from 40 notes! drive it like u stole it!

200 miles from a tank is just a dream for me. I dont care I did'nt buy my 182 to save the environment

 

[Clart]

If u can't get 35mpg when ur driving down the motorway at 80/90 then theres something wrong with ur driving or something wrong with the car

 

[oneeighttwo]

Mine has been tuned to 201 BHP by GDI though.... And I've only done town driving since and its at a steady 19.5MPG at the mo. I did used to get between 30 - 35 on the motorway but I have not done a motorway stint yet with the mods. Very rarely do motorway driving anyway, about once or twice a month.

 

[Jay]

Mines a about 21-22mpg due to only driving 3-3.5 miles in traffic to work and back. Needs to have a good run....

 

[MrStabby]

Lol been averaging around 42mpg

But that is 60miles a day in 5th not going above 3k revs

Nothing like getting 400+ miles from a tank in a 172. But I have times where I fill up and a tank lasts 280 miles :?

 

[Rob669]

My mpg has dropped too. Like the man said, must be the weather.

Rob669

 

[rcp]

I get 19.5 MPG

I got that on the Brands trackday!

 

[howie p]

once the engine is warm surely the cold would be good, more dense, more power, more mpg??

 

[rich_h]

once the engine is warm surely the cold would be good, more dense, more power, more mpg??

The cold dense air makes it throw more fuel in, so you get lower mpg.

 

[msa197]

^^^^^ and it feels faster LOL

 

[oneeighttwo]

I got that on the Brands trackday!

I was at Brands to (the day it pissed down) and was getting 24 MPG but that was before the mods.

 

[Macca172]

I was at Brands to (the day it pissed down) and was getting 24 MPG but that was before the mods.

That was a fantastic track day... Looking forward to the next one at Brands!
My mpg ended up at 18.8 after that session!!

 

[fizzy_drink]

I'll try to re-fit a paper filter... see what happens.

 

[Alan]

I get 28mpg in my 1.2!

Thats pretty poor mate, does the car need a service or do you just rag it everywhere?

 

[edde]

What fuel have you been running the car on that can make a difference.
The wetaher will affect it though.
200 miles to a tank though? I start to get worried when I've only 200 miles left in a tank.

 

[Tigger]

I've got a drop in mine (standard 172) since it had a bit of work done for MOT :S
Gearbox stripped & new seals in
New O/S driveshaft

Around town I would of been getting 30-33mpg
last night my average was 19.8

Any ideas?

 

[cat171]

2.5 year bump, get in !!

My dad has it too on his 52 172, after it came back from renault from having the cambelt done the mpg as totally dropped down. He could get 45 mpg from it, now he's lucky to get 35 mpg:S same driving style & conditions etc.

He took it back to them & they claimed to have done a few checks on it, he told the dude that some could get over 40 mpg (info I found out on here & printed off hfor him)
The dude claimed that he's never heard of that bafore and it was quite impossible to do. They gave him the car back with an average of 46 mpg showing on it :S in order to get the high mpg figure, they had all the fans off & no air con on either, they also didn't do any speed in it.

 

[Tigger]

Mine was averaging at 37-42mpg (combined driving) before they did the work :S

 

[Mark One]

Few things:
Clean air filter,
Could be the cold air (but I seriously doubt it)
Lambda sensor may help, it certinally did for me, twice.
http://www.cliosport.net/forum/showthread.php?t=314560&highlight=FAO+everyone

 

[Black-Clio-1.4]

I was really confused, until I looked at the bloody date!!!

91p for unleaded?!!! I wondered where the fook he lived!

Bit of a look back into the past!

 

[cat171]

Few things:
Clean air filter,
Could be the cold air (but I seriously doubt it)
Lambda sensor may help, it certinally did for me, twice.
http://www.cliosport.net/forum/showthread.php?t=314560&highlight=FAO+everyone

Just had a read of that, interesting stuff. I'll print off

 

[Mark One]

Few things:
Clean air filter,
Could be the cold air (but I seriously doubt it)
Lambda sensor may help, it certinally did for me, twice.
http://www.cliosport.net/forum/showthread.php?t=314560&highlight=FAO+everyone

Just had a read of that, interesting stuff. I'll print off

Thanks very much. :approve:
If you record any results yourself, post them up on that thread.

 

[cat171]

Yep, i'll pass it on to him & ask him to let me know.