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[TECHNOPUG]

15.8mpg since April in mine. That's mainly due to quite a but of town driving, well, central London crawling to be precise! Will run at mid-20's on the motorway, although I'm running smaller radius wheels (55's on 15 rims) which will lower the gearing - don't know whether this will be refelected in the trip computer calcualtions? I think the speedo is over-reading by around 5%, so not really anything noticeable. Managed about 22mpg on a 270miles trip across Europe in the summer. Stuck 60l in the tank at Adeanau and managed to get all the way to Dunkirk ferry terminal and into the BP at Dover with zero miles range showing.....not too bad considering it was pretty much a 100mph hack all the way. Misfire probably isn't helping matters but I'll address that when I get her back from the MoT station.
     Altogether, not exactly frugal, but then again she only cost £460 to buy and I'm probably doing less than 5k a year - so I don't mind paying out the petrol tokens in return for the nice V6 growl when she gets to stretch her legs.

[rastamanblues]

Over the past 2/3 tank fulls, The averages have been between 28-32mpg, thats with a few runs to MK and back, but also giving it quite alot of right foot action. I also stuck it into instant consumption mode, and managed to get it down to the high 6's low 7's!

It also prolly helps that my trek to work is about 14/15 miles each way, and thats a mix of a/b roads, and a trip down the M4, with very little traffic, so no stop start.

[TheBoy]

I use my car mostly on combined runs with some town driving, and consistently get 30+ mpg, with my 3.0 V6 Auto Estate.

With unleaded at 91ppl here, and diesel 15p more at 106ppl, it makes no sense whatsoever to get an oil burner.

For me, petrol is just over £4 a gallon, to which I get 30 miles. That's less than 13p per mile, so I'm more than happy with that, given car size, engine size, and autobox.

If fuel economy  over short distances is anything of a concern for you, then I'd probably suggest a V6 Omega probably isn't the best choice of vehicle in that department  

In terms of incresing MPG, my biggest bit of advice is make sure it's getting up to temp quickly  

If you are getting a consistent 30mpg from 3.0 auto, you would get mega miles from a chipped tractor manual if you drove it the same Miss Daisy way

[TheBoy]

Since filling up tractor on Saturday morning, 24mpg .  Hopefully now resolved

[Kevin Wood]

If you are getting a consistent 30mpg from 3.0 auto, you would get mega miles from a chipped tractor manual if you drove it the same Miss Daisy way

.. and probably won't miss the power. So, a pair of ear defenders on your Christmas list and you're sorted.

Kevin

[TheBoy]

If you are getting a consistent 30mpg from 3.0 auto, you would get mega miles from a chipped tractor manual if you drove it the same Miss Daisy way

.. and probably won't miss the power. So, a pair of ear defenders on your Christmas list and you're sorted.

Kevin

Oi  

I changed the oil on Saturday, now I can here the wheel bearing

[MickAP]

My speedo tells me I've just done say 37 miles (trip mileage) and my MID also tells me I've covered the same distance. Question can I believe it's telling me I've achieved 37 mpg. The reason I ask is I don't completely know whether if that accurate because I have had the TD chipped recently.
How does the MID take it's mileage covered calculation, and fuel used calculation. OK maybe a bit thick on this one, but can someone explain so's I can understand whether it's giving me the correct info.

Mick

[Peter H]

My 2 cents.

My 2.5V6 Elite (prefacelift 1999) returns 21mpg pocing about in Somerset, lanes and all, and just managed 29.4 return run to London for a theater trip.

My XJ-S does around 15 mpg on the local circuit, and has done 20.8 mpg on a London run.  

I always run my tyres near the upper end of the range, I think the Omega is 32psi front 30 rear, but I am not sure how much help this actually is.

Given that the Omega is more comfy I think it is a small price to pay for the amount of car you get to drive.

When filling up I always think of the depreciation on say a BMW 535d and feel better about another £60 of unleaded!

[Kevin Wood]

MID needs 2 inputs to work out MPG: Distance covered and fuel used.

Distance comes from the same signal from the ABS ECU that the speedo uses so it should be reasonably accurate.

Fuel used comes from a signal from the ECU which indicates how much fuel it thinks it's injecting. This is not measured, but depends on the (known) flow rate of the injectors and the duration for which they are open. If the flow rate of the injectors is not as it should be or fuel is leaking out, etc. the MPG reading will be inaccurate.

The above applies equally to petrol and diesel engines. I find the MID is within 1 or 2 MPG.

Kevin

[MickAP]

MID needs 2 inputs to work out MPG: Distance covered and fuel used.

Distance comes from the same signal from the ABS ECU that the speedo uses so it should be reasonably accurate.

Fuel used comes from a signal from the ECU which indicates how much fuel it thinks it's injecting. This is not measured, but depends on the (known) flow rate of the injectors and the duration for which they are open. If the flow rate of the injectors is not as it should be or fuel is leaking out, etc. the MPG reading will be inaccurate.

The above applies equally to petrol and diesel engines. I find the MID is within 1 or 2 MPG.

Kevin

So do you think having changed the chip on the TD would have messed the figures up on mine or should it still be reasonably accurate. In other words are the MID readings correct.
I get roughly around 10 mpg more now than I was getting pre chipped. The chip was obtained and fitted by our good friends here on the forum, so others have the same fitment on their TD's.

Mick

[beemerdevil]

well........hmmm......quite a variation of mpg figures there peeps.........i did about 250 mile rond trip at weekend, 90% motorway, and according to the obc, i did about 25 mpg - that was cruising at 85-90 (and obviously slowing to 50 mph speed zones on the A1)  i dont think thats bad at all  

[TheBoy]

MID needs 2 inputs to work out MPG: Distance covered and fuel used.

Distance comes from the same signal from the ABS ECU that the speedo uses so it should be reasonably accurate.

Fuel used comes from a signal from the ECU which indicates how much fuel it thinks it's injecting. This is not measured, but depends on the (known) flow rate of the injectors and the duration for which they are open. If the flow rate of the injectors is not as it should be or fuel is leaking out, etc. the MPG reading will be inaccurate.

The above applies equally to petrol and diesel engines. I find the MID is within 1 or 2 MPG.

Kevin

So do you think having changed the chip on the TD would have messed the figures up on mine or should it still be reasonably accurate. In other words are the MID readings correct.
I get roughly around 10 mpg more now than I was getting pre chipped. The chip was obtained and fitted by our good friends here on the forum, so others have the same fitment on their TD's.

Mick

As Kevin Wood says above, should be accurate, as its based on how much ecu thinks its putting in, and (on diesel) feedback from injector 4.

The only true way is brim it, use it (not necessarily the whole tank), brim it again, then calculate by hand.