Is there something wrong with my mpg figure...?

Is there something wrong with my mpg figure...?

Author
Discussion

007 VXR

64,187 posts

187 months

Sunday 22nd April 2012
quotequote all
nosubstitute said:
I used my car last week driving like Miss Daisy and got 14mpg. These cars will never give pleasing mpg figures.
Wrong IMHO Mine does good MPG yes

stick100

7,017 posts

168 months

Sunday 22nd April 2012
quotequote all
007 VXR said:
Wrong IMHO Mine does good MPG yes
theres a diffence between driving like mis daisy and being a total tart laugh

007 VXR

64,187 posts

187 months

Sunday 22nd April 2012
quotequote all
stick100 said:
007 VXR said:
Wrong IMHO Mine does good MPG yes
theres a diffence between driving like mis daisy and being a total tart laugh
laugh as i said i got 26mpg mostly m/way
alot of 3rd 4th gear avg over 70 leptons over 160 miles biggrin

stick100

7,017 posts

168 months

Sunday 22nd April 2012
quotequote all
007 VXR said:
laugh as i said i got 26mpg mostly m/way
alot of 3rd 4th gear avg over 70 leptons over 160 miles biggrin
i've got mine upto about 15mpg know so its getting better

ringram

14,700 posts

248 months

Sunday 22nd April 2012
quotequote all
Did 280 miles yesterday, London to Keswick, 12 Gallons = 23.3mpg
Not babying it either.

My long term mileage computer on the dash is reading 24mpg at the moment, sits between that and 23mpg.

So you guys getting less must be doing loads of around town use, or as mentioned need to do some data logging.
Check out your fuel trims, o2 switching, mv readings, codes etc.

The Seer

Original Poster:

664 posts

211 months

Tuesday 24th April 2012
quotequote all
ringram said:
Did 280 miles yesterday, London to Keswick, 12 Gallons = 23.3mpg
Not babying it either.

My long term mileage computer on the dash is reading 24mpg at the moment, sits between that and 23mpg.

So you guys getting less must be doing loads of around town use, or as mentioned need to do some data logging.
Check out your fuel trims, o2 switching, mv readings, codes etc.


Yeah, I do use the car for fair amount of round town usage. I donh't often see motorway journeys. Just used a pleasure ride at the weekend.

the_ferret82

25,627 posts

184 months

Tuesday 24th April 2012
quotequote all
The Seer said:
Yeah, I do use the car for fair amount of round town usage. I donh't often see motorway journeys. Just used a pleasure ride at the weekend.
then i doubt you will see more MPG than your getting.

i have just done over 600 miles in the last 2 weeks with a mixture of motorway, A roads and B roads and returned avg 20mpg and i was not hanging around for any of those miles.

fyi that was all done on 2 full tanks only..

The Seer

Original Poster:

664 posts

211 months

Tuesday 24th April 2012
quotequote all
the_ferret82 said:
The Seer said:


Yeah, I do use the car for fair amount of round town usage. I donh't often see motorway journeys. Just used a pleasure ride at the weekend.


then i doubt you will see more MPG than your getting.

i have just done over 600 miles in the last 2 weeks with a mixture of motorway, A roads and B roads and returned avg 20mpg and i was not hanging around for any of those miles.

fyi that was all done on 2 full tanks only..


Pay day tomorrow means more fuel for the car. I'll reset the trip computer and record different journeys on various roads.

merdock

494 posts

160 months

Tuesday 24th April 2012
quotequote all
Hi,
Best bet is turn the dam thing off and enjoy driving.or buy a BMW Performance Diesel.

ringram

14,700 posts

248 months

Wednesday 25th April 2012
quotequote all
The Seer said:
The only motorway journey I have done is when I bought the car, circa 235 miles and even then I used 6th, kept it steady between 65-80 and it used a tank and a half!

I can't figure why with driving the car easily and normally (most of the time) I'm getting such low mpg. Ten quid see's no more than twenty miles.
If this is correct then something is seriously wrong either with your tune, or with perhaps your O2 sensors, exhaust leak etc.
Get it seen to!

Tattooboy

7,946 posts

178 months

Wednesday 25th April 2012
quotequote all
ringram said:
The Seer said:
The only motorway journey I have done is when I bought the car, circa 235 miles and even then I used 6th, kept it steady between 65-80 and it used a tank and a half!

I can't figure why with driving the car easily and normally (most of the time) I'm getting such low mpg. Ten quid see's no more than twenty miles.
If this is correct then something is seriously wrong either with your tune, or with perhaps your O2 sensors, exhaust leak etc.
Get it seen to!
As mentioned above, something does seem to be at issue with your car, I get more MPG than that with a Supercharger, and I don't hang around !

A trip to Mr Fish may be a worth while journey.

yorky500

1,715 posts

191 months

Wednesday 25th April 2012
quotequote all
With an LS2 lump, my average reading between 10,000km services are 12.2l/100km at an average speed of 107km/h. Only rest the counter after each service.

The Seer

Original Poster:

664 posts

211 months

Wednesday 25th April 2012
quotequote all
ringram said:
The Seer said:
The only motorway journey I have done is when I bought the car, circa 235 miles and even then I used 6th, kept it steady between 65-80 and it used a tank and a half!

I can't figure why with driving the car easily and normally (most of the time) I'm getting such low mpg. Ten quid see's no more than twenty miles.


If this is correct then something is seriously wrong either with your tune, or with perhaps your O2 sensors, exhaust leak etc.
Get it seen to!


Post cat O2 sensors have been deleted, could this be an issue?

Johnyboi1

159 posts

181 months

Thursday 26th April 2012
quotequote all
I have a 05 vxr averages 20 mostly town driving an i do drive it quite hard, siting at 60 can see 37 mpg no problem once its warmed up

ringram

14,700 posts

248 months

Thursday 26th April 2012
quotequote all
The Seer said:
Post cat O2 sensors have been deleted, could this be an issue?
No, they are only there to QA cat function.

But if you are running in open loop the whole time at 12:1 AFR that would explain it.. which is why it was suggested by Mr Fish that you need to do some data logging to see if anything looks weird.

The Seer

Original Poster:

664 posts

211 months

Friday 27th April 2012
quotequote all
ringram said:
The Seer said:


Post cat O2 sensors have been deleted, could this be an issue?


No, they are only there to QA cat function.

But if you are running in open loop the whole time at 12:1 AFR that would explain it.. which is why it was suggested by Mr Fish that you need to do some data logging to see if anything looks weird.


Ok, maybe this data logging may be a matter of course. It's not that expensive?

The Seer

Original Poster:

664 posts

211 months

Friday 27th April 2012
quotequote all
The Seer said:
ringram said:
The Seer said:


Post cat O2 sensors have been deleted, could this be an issue?


No, they are only there to QA cat function.

But if you are running in open loop the whole time at 12:1 AFR that would explain it.. which is why it was suggested by Mr Fish that you need to do some data logging to see if anything looks weird.


Ok, maybe this data logging may be a matter of course. It's not that expensive?


Yes/no?

ringram

14,700 posts

248 months

Friday 27th April 2012
quotequote all
Depends where you take it.
Ring around and ask. Some may do it as part of helping diag something on the basis any issue found will end up with work for them.
If you are around SE England you are welcome to pop by and Ill take a look for you to see if its anything obvious like fuel trims, o2 switching, codes etc.

The Seer

Original Poster:

664 posts

211 months

Friday 27th April 2012
quotequote all
ringram said:
Depends where you take it.
Ring around and ask. Some may do it as part of helping diag something on the basis any issue found will end up with work for them.
If you are around SE England you are welcome to pop by and Ill take a look for you to see if its anything obvious like fuel trims, o2 switching, codes etc.


South East mate? I'm in Essex reasonably close to you? Many thanks for the offer, much appreciated!

The Seer

Original Poster:

664 posts

211 months

Saturday 28th April 2012
quotequote all
The Seer said:
ringram said:
Depends where you take it.
Ring around and ask. Some may do it as part of helping diag something on the basis any issue found will end up with work for them.
If you are around SE England you are welcome to pop by and Ill take a look for you to see if its anything obvious like fuel trims, o2 switching, codes etc.


South East mate? I'm in Essex reasonably close to you? Many thanks for the offer, much appreciated!


Ello?