my car is giving me too many miles per gallon :D
Discussion
thought id complain about my cars MPG, Basically today i went from Manchester to London round trip (420 mile journey)
as i am the sort of person that just enjoys driving, soo i put my car on cruise control at 55mph behind a truck all the way and same on the return journey
on the way back i thought why not reset the trip meter to see what MPG my car is giving
it turned out 68 MPG, i cant believe this C220 Automatic, just checked autotrader and a similar car to mine is supposed to do 53 mpg
the 68 mpg sounds about right because i put £45.00 diesel in and still have around £10 left so used around £35
i usually see people on here complaining about real mpg vs manufacturer mpg
oh i would like to ask one question aswel. i did the round trip and my thermostat never went past 60 degrees, usually should be at 90 degrees, is this going to cause damage to the engine?
as i am the sort of person that just enjoys driving, soo i put my car on cruise control at 55mph behind a truck all the way and same on the return journey
on the way back i thought why not reset the trip meter to see what MPG my car is giving
it turned out 68 MPG, i cant believe this C220 Automatic, just checked autotrader and a similar car to mine is supposed to do 53 mpg
the 68 mpg sounds about right because i put £45.00 diesel in and still have around £10 left so used around £35
i usually see people on here complaining about real mpg vs manufacturer mpg
oh i would like to ask one question aswel. i did the round trip and my thermostat never went past 60 degrees, usually should be at 90 degrees, is this going to cause damage to the engine?
You picked the exact situation where a car will get its best mpg - my impreza used to see 27-28 mpg in those conditions compared to 13-15 in mixed driving, my megane reports over 50mpg if i sit at 60 too.
Its unlikely to do any harm as i assume its not labouring - i do suspect your thermostat is broken though
Its unlikely to do any harm as i assume its not labouring - i do suspect your thermostat is broken though
Every car I have ever had will smash the official "mixed" MPG figures doing this, it's what the "extra urban" figure represents. I can get well into 60+ MPG from my C70 D5 doing this.
Also I have found some cars have extremely accurate fuel economy computers and others are miles wide of the mark. Only way to know for sure is, as people say, to work it out manually. If your computer tracks your calculations accurately you can start trusting it.
Also I have found some cars have extremely accurate fuel economy computers and others are miles wide of the mark. Only way to know for sure is, as people say, to work it out manually. If your computer tracks your calculations accurately you can start trusting it.
ahah yes i agree most may find it boring behind a truck for 4/5 hours. it was not directly behind truck to avoid stone chips, probably around 100 meters
i actually enjoyed it. no stress, music was on full, singing along, enjoying all the nice cars flying past in the fast lane.
should i worry about the thermostat being broken? because i cant afford to repair at the moment or is it possible to get it changed after a month or so without engine being damaged, just spent £650 on electric steering lock problems these W204 come with.
i actually enjoyed it. no stress, music was on full, singing along, enjoying all the nice cars flying past in the fast lane.
should i worry about the thermostat being broken? because i cant afford to repair at the moment or is it possible to get it changed after a month or so without engine being damaged, just spent £650 on electric steering lock problems these W204 come with.
ikarl said:
doodz444 said:
i am the sort of person that just enjoys driving, soo i put my car on cruise control at 55mph behind a truck all the way and same on the return journey
Are you sure you enjoy driving?
i said no, I'm coming to collect it ! just so i had a reason to go on a long drive
EDIT:
my normal mpg is a silly number near 20mpg, i blame sport the button and rear wheels, hence why im shocked at 68mpg
Edited by doodz444 on Saturday 21st February 13:27
doodz444 said:
because i cant afford to repair at the moment
Use all the money you are saving on fuel and capital letters, that should easily cover the cost.I used to do a long journey twice a week and once I decided to try just sitting in the inside lane with the trucks and cruising along. Great fuel economy, arrived at the other end more relaxed and far less tired than normal but my god it was boring! It also took me an hour longer than normal and an hour of sitting at 50 - 55mph just isn't fun.
Just to add my four pennyworth so all you throttle hooligans can call me a w''nk'r. At 85 MPH you are using TWICE as much fuel as you are at 60MPH. Keeping a cars revs at or below 2000 RPM will always give you the best MPG. (This is the reason that trucks never rev more than 1500RPM because it gives them the best economy).
Behind a truck you will have zero airstream & even reversed airstreams, effectively giving you a bonus tailwind. To be fair this is about as near to real life you can get to the official figure drive cycle driving.
A gen1 Honda insight is just about in lean burn at that speed so 130mpg is on the cards with a tailwind. Ideal for cheapskates.
A gen1 Honda insight is just about in lean burn at that speed so 130mpg is on the cards with a tailwind. Ideal for cheapskates.
Blue Oval84 said:
If your car has a DPF then you need to think about getting it done sooner rather than later ideally, it won't regenerate at 60 deg and will get more and more clogged. My mate's E60 did something similar and it cost a bit to put right.
Now thats something i did not think about. hmmm true, engine management light comes on and off randomly, most likely to do with the thermostat. Back to the specialist 
thanks
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