Ok filled the tank up, cost about Ԛ£47ish and drove my m3 cab from scotland to manchester which is about 240 miles or so, and it almost used to whole tank, bearing in mind i wasnt ripping it, only about 85mph to 95mph most of the way. and i had to fill her up again to come back up. so about 2 tanks Ԛ£90 quids's worth for a round trip (just under 500 miles)
This cant be right can it? and how do i sort it out? whats causing it? one guy says it might be the lamda sensor? another guy tells me its an air leak in my inlet block? and so on.
really crap fuel consumption?
Moderator: martauto
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
The weight of your right foot.koolz wrote: whats causing it? .
Whatever good points the E30 may have, and we all agree on here that they are many, it's drag coefficient isn't one of them.
If you force a large brick shape through the air at 85 - 95 MPH, then it'll use a lot of energy doing so. Combine that with the fact that fuel efficiency wasn't the highest priority on the engine designers list, then fuel consumption in the low 20s is easily achieved.
I managed to get down to 15 over a whole tank full doing some (illegally) high speed towing about three months ago.
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koolz
- E30 Zone Newbie
- Posts: 88
- Joined: Wed Jan 12, 2005 11:00 pm
yeh but the thing is, that i drove the car down to the midlands one time which also used a full tank, and i got almost 300 miles, and the thing is when i stand next to the car when its on idle, u can smell it chuking out fuel from the back.
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Globulator
- E30 Zone Regular
- Posts: 389
- Joined: Fri Sep 23, 2005 11:00 pm
Yes, this is a 2.5litre car that I have sometimes found less economical than a 3.6litre turbo car 
the upside benefit is that because tax discs cost money even if you travel 0 miles, using as much petrol as possible reduces the percentage car tax you pay
the upside benefit is that because tax discs cost money even if you travel 0 miles, using as much petrol as possible reduces the percentage car tax you pay
1986 325i 'vert, funk louder than standard.
"No Mr Bond, I expect you to tell me why your 4 litre, 282bhp sports car can't outrun some lardy old Mercs.."
Audio & electronic software: http://www.cutestudio.net
"No Mr Bond, I expect you to tell me why your 4 litre, 282bhp sports car can't outrun some lardy old Mercs.."
Audio & electronic software: http://www.cutestudio.net
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Brianmoooore
- E30 Zone Team Member
- Posts: 49360
- Joined: Mon Jan 10, 2005 11:00 pm
Decent service is the first thing, including new plugs. Check the colour of them after a couple of weeks.
If it's still overfueling at idle, the first thing to check is the engine ECU coolant temperature sensor, or replace it anyway.
If it's still overfueling at idle, the first thing to check is the engine ECU coolant temperature sensor, or replace it anyway.
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Rupe30
- E30 Zone Newbie
- Posts: 102
- Joined: Sun Oct 08, 2006 11:00 pm
i'm getting 180miles out of a full tank if i'm lucky... guessing i may have a fuel leak??
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fuzzy
- He who sleeps with "Gingers"
- Posts: 14351
- Joined: Sat Jun 04, 2005 11:00 pm
- Location: melbourne Australia
180 miles from a full tank isnt what id call lucky8O thats worse than mine .its either a fuel leak or the gypos are syphoning out your fuel while you sleepRupe30 wrote:i'm getting 180miles out of a full tank if i'm lucky... guessing i may have a fuel leak??
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seanboy
- E30 Zone Regular
- Posts: 642
- Joined: Mon Aug 21, 2006 11:00 pm
- Location: Beckenham
You probally would have checked this already, A week after I got my cab I noticed a stong smell of petrol at junctions. Thought she's running rich, pulled up on drive there's a puddle, started her up again and petrol was spraying out from the fuel line coming away from filter. replaced fuel line problem solved. dont know if this helps.