Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: viper357 on 28 March 2013, 19:06:27

Title: Better fuel consumption on 3.2?
Post by: viper357 on 28 March 2013, 19:06:27
Hi guys, silly question :P But is there anything I can do to eke out an extra mpg or two on my 2001 3.2 v6? Apart from the obvious regular servicing and leaving it parked in the garage, lol. Are there any changes I can make? I'm a novice with the Omega's so any advice would be appreciated, thanks.
Title: Re: Better fuel consumption on 3.2?
Post by: VXL V6 on 28 March 2013, 19:12:52
What are you currently getting out of it?
Title: Re: Better fuel consumption on 3.2?
Post by: viper357 on 28 March 2013, 19:21:08
What are you currently getting out of it?
10 litres of fuel gives me about 30 miles doing school runs every day.
Title: Re: Better fuel consumption on 3.2?
Post by: OmegaAnglesey on 28 March 2013, 19:22:23
I'm sure someone will recommend LPG and that wouldn't be a bad idea if your using it as your main daily car. Or just buy something smaller for the daily stuff and use the Omega for long journeys , weekends, summer etc  :)
Title: Re: Better fuel consumption on 3.2?
Post by: feeutfo on 28 March 2013, 21:11:23
Insure that;

multi rams work.
Exhaust isn't blocked.
Cam timing is cock on.
Insure all extra weight is out of the car.
Pressures are good er ing on the high side

Lpg it.

Drive with minimal braking, ie, off the gas early and coast up to the junction etc. use the auto box minimal engine braking to your advantage.


Title: Re: Better fuel consumption on 3.2?
Post by: TheBoy on 28 March 2013, 21:18:24
Make the kids walk to school!

Not sure LPG is the answer here, as guessing all short journeys?
Title: Re: Better fuel consumption on 3.2?
Post by: feeutfo on 28 March 2013, 21:24:47
Good point. You do need to do the miles to warrant lpg outlay.
Title: Re: Better fuel consumption on 3.2?
Post by: dbdb on 28 March 2013, 23:50:28
superunleaded.  Got me 10% more mpg in a V6 2.5 and its not 10% more expensive.

You could also try thinner oil eg 5W30.
Title: Re: Better fuel consumption on 3.2?
Post by: zirk on 29 March 2013, 00:13:40
What are you currently getting out of it?
10 litres of fuel gives me about 30 miles doing school runs every day.

That equates to 13.6 MPG,  that cant be right :-\
Title: Re: Better fuel consumption on 3.2?
Post by: jonny2112 on 29 March 2013, 00:28:11
Does sound a bit low, even without the calculation.
Definitely 10 litres of fuel, rather than £10 worth?
Title: Re: Better fuel consumption on 3.2?
Post by: Lazydocker on 29 March 2013, 00:34:11
Does sound a bit low, even without the calculation.
Definitely 10 litres of fuel, rather than £10 worth?
Good point... I always reckon on about 30p per mile on petrol from mine (and about 21p now on LPG)  :-\
Title: Re: Better fuel consumption on 3.2?
Post by: Andy B on 29 March 2013, 00:42:10
What are you currently getting out of it?
10 litres of fuel gives me about 30 miles doing school runs every day.

Do a proper brim-to-brim calculation  ;)
Title: Re: Better fuel consumption on 3.2?
Post by: jonny2112 on 29 March 2013, 00:44:53
It's the only way to create accurate results, and 'about' takes on a whole new level of importance when discussing mpg on Omegas  :D
Title: Re: Better fuel consumption on 3.2?
Post by: Andy B on 29 March 2013, 00:46:28
It's the only way to create accurate results, and 'about' takes on a whole new level of importance when discussing mpg on Omegas  :D

 ...... and R320s  ::) ::) ::)
Title: Re: Better fuel consumption on 3.2?
Post by: viper357 on 29 March 2013, 07:31:10
Thanks guys, the way I have been measuring is as soon as the fuel light comes on I set the trip meter to zero and put in 10 litres (not £10), then drive until the fuel light comes on again, I did this religiously for 2 weeks and it always measured in at 30 to 32 miles before the fuel light came on again.
Title: Re: Better fuel consumption on 3.2?
Post by: viper357 on 29 March 2013, 07:33:36
Make the kids walk to school!
lol, I would if I could but it's a 8 mile walk.  :(
Title: Re: Better fuel consumption on 3.2?
Post by: jonny2112 on 29 March 2013, 07:42:29
Thanks guys, the way I have been measuring is as soon as the fuel light comes on I set the trip meter to zero and put in 10 litres (not £10), then drive until the fuel light comes on again, I did this religiously for 2 weeks and it always measured in at 30 to 32 miles before the fuel light came on again.

Fair enough. I wouldn't put too much faith in the light, but your results are certainly consistent.
At a tenner, I would have said it was about right, but with another third on top I would expect a bit more  :(
Title: Re: Better fuel consumption on 3.2?
Post by: cem_devecioglu on 29 March 2013, 08:56:04
if its auto, convert to manual.. if most of your commute is urban your consumption will drop.. there are some mechanics here who converts them..
Title: Re: Better fuel consumption on 3.2?
Post by: tigers_gonads on 29 March 2013, 09:26:09
What are you currently getting out of it?
10 litres of fuel gives me about 30 miles doing school runs every day.

That equates to 13.6 MPG,  that cant be right :-\


I'm getting about 25 miles to a tenner (17mpg ish) with mine and I don't mess about  ;)
Check the multirams ect imo  :)
Title: Re: Better fuel consumption on 3.2?
Post by: tunnie on 29 March 2013, 09:31:44
This thread is making my eyes water  :o

100 miles costs me around £12, £14 if town work, with summer tyres on (uh-oh!) got around 412 miles to a tank (74L/£50) of gas.
Title: Re: Better fuel consumption on 3.2?
Post by: tigers_gonads on 29 March 2013, 09:39:16
This thread is making my eyes water  :o

100 miles costs me around £12, £14 if town work, with summer tyres on (uh-oh!) got around 412 miles to a tank (74L/£50) of gas.


Tell me about it  ::)

I finished the back end of the lpg conversion 3 weeks ago but due to wind / rain / snow / taxi service for the missus or my own work, its gone no further  :'(
What i'd do for a garage to work in. All my work is carried out on the road outside my house  :(

Anyway, enough moaning, the sun is out  :-X so I've got a gearbox oil filter clean / flush and a selector to abuse clean and setup  :)
Title: Re: Better fuel consumption on 3.2?
Post by: I_want_an_Omega on 29 March 2013, 09:43:17
Make the kids walk to school!
Not sure LPG is the answer here, as guessing all short journeys?

+1.  :y Much better on all fronts as far as I can see .............
Title: Re: Better fuel consumption on 3.2?
Post by: viper357 on 29 March 2013, 09:43:47
Is there an idiots guide to what these "multiram" things are and how do I check if it's working ok? I've done a search but can't really find anything that explains what they are and what they do and how to check them? Thanks guys.
Title: Re: Better fuel consumption on 3.2?
Post by: Andy B on 29 March 2013, 09:52:59
Is there an idiots guide to what these "multiram" things are and how do I check if it's working ok? I've done a search but can't really find anything that explains what they are and what they do and how to check them? Thanks guys.

The maintenance section has some references  :-\
http://www.omegaowners.com/forum/index.php?topic=90499.0
http://www.omegaowners.com/forum/index.php?topic=90513.0
Title: Re: Better fuel consumption on 3.2?
Post by: bootzey on 29 March 2013, 10:33:56
I'm doing much better than that....mine does about 15 miles to a tenner!!  :'(

What do you think of these http://engineheaters.co.uk/ (http://engineheaters.co.uk/) ? Only £50 for a 2.6/3.2

I found this after wanting to make my own way that pre-heated my engine to save a lot of fuel and reduce engine damage. Not a new idea in itself I know but was googling after designing some things and trying to find a way of using the electric pumps connected to our cooling systems and discovered this.

They seem to make sense and could save me £30/week if they do as they say on the tin. The company told me that the oil never gets baked on to the sump. The only problem is miggies are quite low and we have rather a lot of speed humps on our roads so they could get scrapped off.

Could even put one on the gearbox sump.

I'm also looking at ways to pre-heat the air intake between the air filter and MAF so the ECU is "tricked" in to reducing the fuel injected.

Any thoughts? Just don't shoot the messenger  :)
Title: Re: Better fuel consumption on 3.2?
Post by: 05omegav6 on 29 March 2013, 10:55:55
122 miles from the last £40 (£1.37). Driven gently due to suspension issue, but biggest culprits have to be a failed thermostat and low ambient temperatures :-\ between -3° and +4° lately.
Title: Re: Better fuel consumption on 3.2?
Post by: Elite Pete on 29 March 2013, 11:05:03
Fit a proper gearbox ::)
Title: Re: Better fuel consumption on 3.2?
Post by: Webby the Bear on 29 March 2013, 11:22:49
in addition to chris gixers post as to what cud also be the culprit....

vacuum leak
faulty maf sensor
faulty coolant temp sensor
faulty thermostat
faulty o2 sensor
leaking exhaust/exhaust manifold
timing out
Title: Re: Better fuel consumption on 3.2?
Post by: zirk on 29 March 2013, 14:02:12
Make the kids walk to school!
lol, I would if I could but it's a 8 mile walk.  :(
In that case get yourself a little 1.2 LPG run around and the Kids can run behind you. :y
Title: Re: Better fuel consumption on 3.2?
Post by: tunnie on 29 March 2013, 14:04:57
8 miles? I'd cycle it  :)
Title: Re: Better fuel consumption on 3.2?
Post by: TheBoy on 29 March 2013, 18:43:23
What are you currently getting out of it?
10 litres of fuel gives me about 30 miles doing school runs every day.

That equates to 13.6 MPG,  that cant be right :-\
About right for an auto in urban traffic.

Christ, I only managed 15mpg over an entire tank earlier in the week, and that was in open countryside
Title: Re: Better fuel consumption on 3.2?
Post by: dbdb on 29 March 2013, 18:57:43
Thanks guys, the way I have been measuring is as soon as the fuel light comes on I set the trip meter to zero and put in 10 litres (not £10), then drive until the fuel light comes on again, I did this religiously for 2 weeks and it always measured in at 30 to 32 miles before the fuel light came on again.
How does that compare with the avg MPG on the Multi Information Display?  You can reset that at any time, it then calculates your avg MPG from then on.  Many here don't trust it but I have found the MID accurate  to under 1 mile on the range function, tested 3 or 4 times on two different migs.  If you don't trust it the fuel light will be no better, probably worse in fact, and brim to brim is the only way.