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[Neil (Cardiff)]

Bit of a strange one - I tend to drive quite economically (or so I thought ) but I've just bought this 2.5 Auto and the display says I'm doing around 15-19mpg through town. This (as expected) goes up drastically when using cruise control on the motorway.

My question really is are these really that accurate? It's just 15mpg sounds ludicrous to me! I have to admit the car is a bit of a shed so I imagine it isn't running very efficiently but still, 15!



Thanks

[rustym95]

they can be out abit, if you put a reader on it should see if there is a fault, some times the speed sensor has a bad connection and dose not read all info, can check this by av speed on display, rest it a few times wile driving making sre you check speedo and av speed are the same.

[Neil (Cardiff)]

That's a really good idea! Thanks for the advice, I'll be giving that a go 

[rustym95]

 

[Darth Loo-knee]

Bit of a strange one - I tend to drive quite economically (or so I thought ) but I've just bought this 2.5 Auto and the display says I'm doing around 15-19mpg through town. This (as expected) goes up drastically when using cruise control on the motorway.

My question really is are these really that accurate? It's just 15mpg sounds ludicrous to me! I have to admit the car is a bit of a shed so I imagine it isn't running very efficiently but still, 15!



Thanks

Stopping and starting the MPG soon drops down, so around 19 doesn't sound far wrong to me being honest. If you put your foot down you can see 7mpg
The other thing there is an Instant MPG (think it says instant :-?) which shows what your doing at that time, plus the Actual MPG which will tell you what you have done over your trip.
So have a look at both mate, so people dont reset the Actual one so they get an idea of what MPG they have got over several thousand miles.
Hope that helps

[Neil (Cardiff)]

Yeah thats what I've been thinking. The car only cost £250 - I'll have spent that in petrol by the end of the month 

Yeah I've seen 7 a lot! I think it's just a big inefficient engine with a slow auto box to be honest. Anyone know of any cheap n quick fixes to maybe improve things a little?

[Darth Loo-knee]

Yeah thats what I've been thinking. The car only cost £250 - I'll have spent that in petrol by the end of the month 

Yeah I've seen 7 a lot! I think it's just a big inefficient engine with a slow auto box to be honest. Anyone know of any cheap n quick fixes to maybe improve things a little?

Give it a service and make sure the breathers are clean to start with

[Neil (Cardiff)]

Thanks, I will give it a go when I get a free hour. Any tips? The only Vauxhall I've ever worked on was a '77 Viva 

Will start with an oil change I think, I think its been in there about 10yrs!

[Darth Loo-knee]

Thanks, I will give it a go when I get a free hour. Any tips? The only Vauxhall I've ever worked on was a '77 Viva 

Will start with an oil change I think, I think its been in there about 10yrs!



If so breathers will definately need a good clean, there should be a How To in the Maintence Section mate

[Neil (Cardiff)]

Ah brilliant, thank you. I have to say I've never come across a website so useful.

[Darth Loo-knee]

here you go

Service with a smile

http://www.omegaowners.com/forum/YaBB.pl?num=1152598350

[Neil (Cardiff)]

Erm this might be totally unrelated, but when I start the car from cold I get a bad hissing sound for about 30secs - I assumed this was the "engine check" but could this be something to do with the breathers?

[Darth Loo-knee]

Where is the hissing coming from?

[CaptainZok]

Where is the hissing coming from?

I'd be guessing something to do with the sai.

[Neil (Cardiff)]

I've got to be honest, I've no idea, under the bonnet but thats about it. I didn't think anything of it, thought it was normal. Oops!