Omega Owners Forum
Chat Area => General Car Chat => Topic started by: SIR Philbutt on 15 July 2011, 01:01:19
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[size=9]Saw this article http://www.omegaowners.com/forum/YaBB.pl?num=1310116709 and it made me think. What displayed and calculated MPG am I getting from mine? and how the hell is it reading it and calculating it? ::) and how does it know if i am on LPG or petrol? (assume it's the air flow sensor thingy). Anyway .....
Soooo filled up with LPG, reset the trip distance and average MPG and drove around as usual. After 150 miles (urban) fill up again (40ltr) shock horror 15 mpg :'(. Average says 17mpg close enough
This is the sad bit
This time determined to get better MPG with better driving. Reset again and set off this time watching the average .... and missing a few green lights as it rapidly goes down whilst stopped :o.
After a few miles get it back to 17, then 16 (bloody lights) then 17 and staying. 17.2, 17.5 17.7 god i'm getting good at this oh nooooo the lights are on red 16.9, 17 and so on and so on. Get the picture :D :D
Got it up to over 19 :y on a good 15 min run with no lights & hills. But currently going between 18 and 18.2 (bloody rush hour & lights :'( ) and yet to fill up again (will update if there is any +ve interest).
Yes i know the LPG wants looking at, it's booked in. Also know it uses some petrol that throws calc out but this is omega science not rocket >:(
What can you get from yours? Lets start a game ;D ;D ;D ;D ;D
Remember drive safe, dont use your mobile or watch your display whilst driving ;)
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i get 30mpg avg, 24 around town. 2.2 manual.
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26.7 mpg at the moment 3.2 auto urbun
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My first meg was an ex plod mv6 on an M reg. On a long motorway run, averaging 75mph, the trip computer and my maths calculated 38mpg :)
Recently drove to my partners from Bristol to Poole, average speed was 35mph (lots of going from 30 to 50 to 40 to 60 to 30 etc etc) and trip now says 25.7mpg. Doing the trip again tomorrow so ill try and get a picture :)
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I used to get 38mpg on a run in my 2.5 manual
It would do 28 on my old city commute and easily 22-24mpg is ragging it.
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My 2.6 auto estate is a thirsty beast - only just over 30mpg on a motorway run and low 20's mpg around town.
my old 2.5 manual saloon used to give me figures similar to Mark's until near the end when we suspected the cat's were colapsing
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The mpg on the display is the theoretical petrol equivalent when running on LPG. The computer doesn't know you aren't burning the petrol as the LPG system is just piggybacking off the petrol ECU.
I found the MID on my mini-facelift was spot on with several manual calculations (for petrol) but not checked the accuracy on the facelift.
For LPG, expect up to a 20% reduction in efficiency
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The mpg on the display is the theoretical petrol equivalent when running on LPG. The computer doesn't know you aren't burning the petrol as the LPG system is just piggybacking off the petrol ECU.
I found the MID on my mini-facelift was spot on with several manual calculations (for petrol) but not checked the accuracy on the facelift.
For LPG, expect up to a 20% reduction in efficiency
Having, very boreingly, been keeping recods for 3 years of LPG running I can only agree here.
The MID on this one runs at an almost constant 17% difference to actual LPG use, prior to LPG conversion it was extremely accurate on petrol, so I have no reason to doubt it.
Figures change rapidly when done over less than 500 miles IMHO, so I tend to reset mine at "significant" times and run over several thousnad miles to try and get a truer picture. ... if I reset every time I put the van on the back the figures would be horrendous !!! A reset when I do an oil change seems to work ... the "distance travelled" then acts as a reminder for the next one.
Just my thoughts ... nowt else .. :)
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in the short time i have had my 3.0 elite the best i have had is 26.4 and when i gave it a thrash inc some sideways roundabout action it went down to around 13-14 WHOOPS lol
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All I know is that my old 2.2 used to get 320/340 miles out of a tank.
The 2.6 has yet to reach 300 miles on a tank, best so far is about 270.
:(
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Being sad, I keep records of my 2 Omegas since LPGing, and know what they returned before on petrol (and had checked the computers were accurate).
In the MV6, my average over many, many tanks of LPG is 19.5. It seems not to vary much with driving style to be honest, but does obviously increase on a decent run. The Elite is around 20.5mpg over about 5 tanks of LPG (I don't use it much ::)), although isn't driven as hard as the MV6.
What I have noticed, its much more economical over the tank if I use the full tank (obviously never completely use it, as running out of gas is a sin ;D). If I refill when only half empty, I tend to get the silly 16mpg figures. Not sure why, as you can't lose that much during the fill/disconnection process :-/
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My 2.6 gave a quite disappointing 28 mpg on a long run recently at about 70mph :(
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All I know is that my old 2.2 used to get 320/340 miles out of a tank.
The 2.6 has yet to reach 300 miles on a tank, best so far is about 270.
:(
Autobox lockup doesn't happen until almost 50mph. You need to go faster than 45 :P
On petrol, in my 3.0l auto, I had to try really hard to get under 300m to a tank. I guess it depends on your definition of how empty the tank is before filling ;)
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My 2.6 gave a quite disappointing 28 mpg on a long run recently at about 70mph :(
I honestly think the non-DBW V6's give noticbly better economy than the DBW ones :'(
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both my 3.0 auto estate and my 3.2 auto estate give around 22 around town...I struggle to hit 30 with either of them without extreme care.
her 3.0 Manual estate gets about 24 around town, low 30's on a careful run.
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both my 3.0 auto estate and my 3.2 auto estate give around 22 around town...I struggle to hit 30 with either of them without extreme care.
her 3.0 Manual estate gets about 24 around town, low 30's on a careful run.
Manual makes a massive difference urban, not convinced it makes much difference on a run.
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Anyway, on LPG, who cares about economy. Its all about fun ::)
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Anyway, on LPG, who cares about economy. Its all about fun ::)
This is true... Hence why I seem to be getting mid teens for my LPG economy all the time :-[ ::)
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All I know is that my old 2.2 used to get 320/340 miles out of a tank.
The 2.6 has yet to reach 300 miles on a tank, best so far is about 270.
:(
Autobox lockup doesn't happen until almost 50mph. You need to go faster than 45 :P
On petrol, in my 3.0l auto, I had to try really hard to get under 300m to a tank. I guess it depends on your definition of how empty the tank is before filling ;)
I'm aware of that, but surely that applies to both a 2.2 and a 2.6?
I have noticed that the 2.6 changes down a lot quicker than the 2.2, even on slight gradients.
Tends to hold the lower gears longer too.
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All I know is that my old 2.2 used to get 320/340 miles out of a tank.
The 2.6 has yet to reach 300 miles on a tank, best so far is about 270.
:(
Autobox lockup doesn't happen until almost 50mph. You need to go faster than 45 :P
On petrol, in my 3.0l auto, I had to try really hard to get under 300m to a tank. I guess it depends on your definition of how empty the tank is before filling ;)
I'm aware of that, but surely that applies to both a 2.2 and a 2.6?
I have noticed that the 2.6 changes down a lot quicker than the 2.2, even on slight gradients.
Tends to hold the lower gears longer too.
I don't think the V6 DBW gearbox maps are as recent or as refined as the V6 non-DBW ones. Probably same for the 2.2...
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as others mentioned, your MID display won't be accurate on LPG :y
I tend to look at pence per mile rather than MPG. I used to be able to crack 10p a mile on a good run. 27mpg at 59p a litre aint bad :D
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As a comparison to all you V6 boys :P I generally get around 29mpg out of my 2.0l 4 pot on runs to and from work (20 miles each way / extra urban).
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As a comparison to all you V6 boys :P I generally get around 29mpg out of my 2.0l 4 pot on runs to and from work (20 miles each way / extra urban).
Which my 3.0 would do on mine if I behaved ;) ;) That wasn't easy though as there are 11 Roundabouts between home and work (20 miles) :o :o
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I averaged 32mpg on the Lakes trip. Motoway up there, days out on the Friday and Saturday, scenic route back down through Lancaster and then back on the motorway. Not bad for a manual chipped 2.5 diesel ;)
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I averaged 32mpg on the Lakes trip. Motoway up there, days out on the Friday and Saturday, scenic route back down through Lancaster and then back on the motorway. Not bad for a manual chipped 2.5 diesel ;)
A manual chipped tractor, esp those with 427 ECU's, I reckon are an excellent combo and compromise for power and economy. Matches the DTi for economy, and trounches it for power and smoothness.
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I have driven from Walsall to Telford (and back again) for the last 2 days.
10 Minutes worth of driving on roads and dual carriageways leading up to the motorway. (hardly any traffic)
25 miles on the motorway doing 65mph.
Then reverse route back.
Getting (according to trip computer) 39MPG from my 3.0v6 Manual.
(Do not know how accurate it is)
Going straight from 2nd to 4th Gear has had a positive effect on fuel economy.
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My 2.6 auto saloon only gives 16 mpg in town driving. Is this low?
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Omega 3.2 Auto estate... 25 average, 29-30 on a run.
Cavalier 1.7TD Manual... Equivalent to 200mpg all day long!!! 75% wvo, don't ya know!! 8-)
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My 2.6 auto saloon only gives 16 mpg in town driving. Is this low?
Yes but easy done. Make sure multi rams are working, and use the auto box tendency to roll without engine braking to roll up to junctions off the power for as long as possible. For more progressive drivers this can be exceptionally dull, but the challenge is to to judge throttle off so no braking is necessary, say, at the next roundabout for example, provided nothing is on the roundabout of course. High corner speed and minimum pedal work is key IMO. Its a very different way of driving, but can be fun, for a while. :-/
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It's probably been covered before but how do you check that the multi rams are working?
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It's probably been covered before but how do you check that the multi rams are working?
No so easy on 2.6/3.2 due to electronic throttle. Basically, get someone to rev it from idle quite hard up to redline (blip, dont hold it there), and you should see them move.
Or, given your location, PM Marks DTM Calib... ....although dont expect a response this weekend ;D
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Getting pretty much bang on 30mpg. mainly use A roads and Motorway at 60 to 80mph.
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Just filled up. I've being driving like a puff and broke 24 mpg (urban), unheard of for me! Still, the black stuff is there to be burnt!
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So far on my 2.6 after travelling around Holland / Germany / Austria & back to Germany I've got an astonishing 33.4 mpg showing on the trip. done over 1500 miles & counting. Just 500ish to go till I'm back home - starting tomorrow.
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8-)Do a round trip of 54 miles daily very good A roads & about 5 miles of dual carriageway, always get bang on 30 MPG makes no difference whether aircon / climate control is on or off have had the 2.6 7 months now & very pleased with it.
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I can't add comment as I don't have my mig anymore, but think of a number and double it for my VW :P
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Thanks for all the responses and the realisation I am not the only one :y
Right continuing to be sad (but not as bad as TheBoy with his books and spreadsheets and VB'd databases showing trends and price comparisons to OPEC oil barrel prices etc etc ;D ;D ;D ;D) please dont take offence
First observation is that you six pot guys have better MPG than us 4 pot lowlife sorts. Ah well! thats what you get from having to work on them more often. Anyway arround 22 - 25 is the norm for a 4 pot
Just filled up on lpg again after having the LPG ecu "fettled" and now getting 17.5 calculated from the receipt. BUT . calculating the same milage, 172, with the number of gals on the MID get to 21.5 mpg which is the same as the MID average (so thats how it calc's it ???). Result getting what should it be ish. :y
Setting of for the Cote D'Azur 8-) on Friday with the tribe and filled to the gunnels with stuff so will report back on that trip. :o
Would be nice if the was a maintenance guide on what to look for/do to get the best, or fix bad, MPG with us all having these guzzlers
As a footnote have just sold the previous meg (xreg) on fleabay for 1220 yet another result :y (although he's not picked it up yet). :-/
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Quite surprised driving down to North Devon from the Lakes last week - managed to get 31-32mpg over the 370 mile journey with 3 people, luggage, gas barbie and various camping accessories. Speed around 75-80. Seem to get better mpg using Shell fuelsaver fuel. :y
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Quite surprised driving down to North Devon from the Lakes last week - managed to get 31-32mpg over the 370 mile journey with 3 people, luggage, gas barbie and various camping accessories. Speed around 75-80. Seem to get better mpg using Shell fuelsaver fuel. :y
Mine liked Shell too. Texaco was it's favorite, 30 miles extra per tank and Asda was worst - 30 the other way.
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Just looked at the trip on my Miggy after getting home. 1872 miles completed, used 56.3 gallons of fuel = 33.25mpg. I think that's quite good really :) :) :) Especially when driving on the
racing tracks ahem! Autobahns I mean and stretching Miggys legs, just a little ;) ;) ;)