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[05omegav6]

Facelifts are a smidgen heavier... And actually have less emission strangulation... Just the ecu and cats... No sai or EGR. They are also a touch more powerful/torquier than the equivalent 2.0 16v/2.5/3.0...

[terry paget]

I did not know FLs were heavier. Not much, surely? Not 10%. I appreciate they are less lumbered with emission devices, that should be in their favour. They seem a bit less frisky. I blame that on the electronic throttle. My right foot tells it to go, but the ECU is able to overrule me if it feels like it. The cruise feels different. When I engage cruise on a PFL there is a surge of power; on the FL nothing happens for a while.

[tigers_gonads]

The compression ratio is iirc, higher on the 2.6 / 3.2 then the 2.5 / 3.0.
Combined with the pre cats and associated ecu software, this screws up the mpg big style.

My first and favourite omega was a pfl 2.5cd saloon with a manual box.
Best handling omega i've ever had and averaged 28 mpg (mixed) with my right foot 

Current steed is a face lift 3.2 Mv6 estate with a shitty auto box.
On lpg, I get no more then 19 mpg (mixed) and its down to 15 mpg around town 

[2boxerdogs]

I do no town work in my 2.6 at all , it is used for my commute to work on excellent A roads it returns around 28 - 30 mpg , on a good run I have achieved 34mpg .Next Saturday I collect my replacement for it Mercedes E430 auto I hope to get 18 - 25 mpg from that V8 4.3 litre , will be very sorry to see the Omega go but have always wanted a V8, & this one ticks all the boxes for me www.mtsv.co.uk

[Kevin Wood]

The compression ratio is iirc, higher on the 2.6 / 3.2 then the 2.5 / 3.0.

Bingo. This is the penalty for removing the sai and egr systems. You have to reduce the compression ratio and this impacts economy slightly.

[terry paget]

Now you have muddled me. TG says compression ratio is higher on facelifts. Kevin says it is lower because of losing the EGR and SAI.
Anyway EGR and SAI only kick in on cold starting, so are not of concern to Uk emission tests.

[05omegav6]

Having stupidly taken the hilift keys home from work this evening I have had cause to return to work... Partly due to the weather conditions, and partly traffic, I have just done 23 miles rather sedately. Pay no attention to average mpg as that's about 20.1 range was showing as 112 miles... Now back at the airport, it's saying 138 miles.  I intend, via the cinema to return home with the same range remaining.

The trick seems to be light throttle, use top unless you're almost stopping at junctions, in which case third is fine, and stop as infrequently as possible. The other approach, which seems to work well is to onky use the clutch for pulling away,  then as the revs hit 2K, lift off, out of gear without the clutch and as the revs drop to 1.5K, simply snick it into the next gear until you hit top, which will be about 41/2 mph. Changing down, simply lift off, out of gear, blip the throttle and as the revs drop back to approx 500RPM higher it should slot into the next gear down just so...

[STEMO]

I'm going to buy a car with a big 3.2 V6 in it. Then I'm going to moan about MPG and drive like granny whilst not using the clutch. break OFF! 

[Andy B]

around town my 3.0 V6 will average anything from 30mpg with a very light right foot on a Sunday morning when everyone else is still in bed to 23/24 if I take everyone on at the Traffic Light Grande Prix .......

mpg is all in the right foot 

[05omegav6]

I'm going to buy a car with a big 3.2 V6 in it. Then I'm going to moan about MPG and drive like granny whilst not using the clutch. break OFF! 

No moaning here if I were to moan itwould be at averaging 20.1 mpg on the mid and using £75 worth of unleaded every week, in which case I would fit lpg and the be pissed off at it only managing 17 mpg

Point is you don't need to rag a car that will pull from 1000RPM in top. Unless you like the noise it makes above 4K... In which case you really don't care about the economy...

[jimbo125]

The noise oh yes the V6 noise ummmmm

[Broomies Mate]

I'm going to buy a car with a big 3.2 V6 in it. Then I'm going to moan about MPG and drive like granny whilst not using the clutch. break OFF! 

No moaning here if I were to moan itwould be at averaging 20.1 mpg on the mid and using £75 worth of unleaded every week, in which case I would fit lpg and the be pissed off at it only managing 17 mpg

Point is you don't need to rag a car that will pull from 1000RPM in top. Unless you like the noise it makes above 4K... In which case you really don't care about the economy...

Nail-Head.

General consensus on here is that the 2.2 will achieve the same sort of economy as the 3.0.  Reasoning being you just don't drive them the same.

A steady 30-70 pull on a motorway slip-road in a V6 is inseparable to a full-on WOT blast in a 2.2.

Also, the V6 is quite a reasonably economical engine at idle.... so city-centre traffic is not too much different.

The economy issue is when you have a very heavy right foot, and several points on your license.  The V6 gets into naughty territory very easily.

[Kevin Wood]

Now you have muddled me. TG says compression ratio is higher on facelifts. Kevin says it is lower because of losing the EGR and SAI.
Anyway EGR and SAI only kick in on cold starting, so are not of concern to Uk emission tests.

Apologies. Hadn't spotted that TG had got it @rse-about-face when I agreed with his post.

EGR is not used only on starting but most of the time, in fact. It is used to reduce burn temperatures and hence NOx emissions, and also slightly increases fuel efficiency on a petrol car. Lowering the compression is a cheaper way of reducing NOx, but at the expense of power (hence the increase in capacity to 2.6/3.2) and fuel efficiency.

[05omegav6]

Well, a self imposed limit of 2k on return trip, sat in top, over 21 miles, including two long, significant hills and several roundabouts sees my range end up at 119 miles.

It was 112 when I left home 46 miles earlier... and shows an average of 31.4mpg... it can be doner, but as said it might not be the most enthralling of journeys 

[Lazydocker]

What's economy? If I was worried about it I wouldn't drive an Omega like I'd stolen it almost all the time!!!

Basically I currently get around 200 miles to £40 of LPG, mostly fast A roads with lots of roundabouts and a bit of town but have recently seen nearly 300 miles (283 rings a bell) from the same tank on a long run

But I just fill it up when it needs fuel