Concerned about IS fuel economy

Post Mon Sep 12, 2005 8:58 pm

ok slap me if im wrong here, baring in mind i did have a 1.3 golf for a year

but i put 20 quid in my bmw on sunday nite, the tank was quite low but not on the orange, iv driven to college and back today about 14 miles there n back, about 3miles at lunch about about ten last nite an my tank is now below quarter, and my OBC range has gone from 191 miles left to 130, is this rite?

do i have a fuel leak/running rich?

or is this normal and i need to just get a new job??

im well concerned please help?

Post Mon Sep 12, 2005 9:04 pm

Mine used to do that.
But it would sit on red for 100 miles before the light would come on.
Just wait for the light

Post Mon Sep 12, 2005 9:05 pm

thanks fella i will do

iv got to try and make 30 quid last me a week getin to college back three times

i must admit one minute the fuel gauge is high the next its rite down!

Post Mon Sep 12, 2005 9:07 pm

mine takes ages for the light to come on

i haven't even dared let it get that low TBH, i though it should have been on before now, i'll fill up just to be sure

as 3.5 litres according ot the OBC lasts forever.

Post Mon Sep 12, 2005 9:09 pm

lol

so what advice shall i go for?

does it sound like a problem or just me not use to normal fuel usage

Post Mon Sep 12, 2005 9:13 pm

Depends how you're driving to be fair.

I've just managed to do 250+ miles on Ãƒ”šÃ‚£30 in mine, but they've all been at least 15mile journeys on A roads without much stopping and only a little town driving.

Post Mon Sep 12, 2005 9:17 pm

I've noticed that the fuel gauge can wander about quite a bit over a period of 15 minutes. Only real way is to brim it, drive it and then rebrim it and see how much fuel you used for so many miles.

Post Mon Sep 12, 2005 9:22 pm

i dont really drive fast to and from college
the first 15 minutes i let it warm up an the last 5 is midly sensible then im there

its not like i even go over 4 n a half when i drive hard, dont need to lol

il leave my gauge on til it goes orange see what happens

Post Mon Sep 12, 2005 9:40 pm

i put 40 pounds in my 320 in one go.....and it lasts me 2 weeks, i get about 325+ out of a tank...simply because i dont give my car a hard time. gear changes at 3,000rpm make it last!!!

Post Mon Sep 12, 2005 9:42 pm

thats what i do most the time

be interesting to see how long this 20 quid lasts

Post Mon Sep 12, 2005 9:55 pm

i was going to the beach the other day and i ahd just got out of where i live and the engine oil light came on.. of course i paniced and went to the nearest garage and bought some castrol 15/40 engine oil for engines that have done over 75,000 miles. after i had topped it up the o.b.c went through the roof saying i had 400+miles to go before i needed to fill up. and fuel economy if magnificent! i cant understand it, it must lubricate the engine better?

Post Mon Sep 12, 2005 10:00 pm

lol

cant help on that but how weird!!

maybe one of the genius' can elaborate...

Post Tue Sep 13, 2005 8:59 am

The IS is great on fuel ! mine always used to average 37mpg. 40+ on a run....

The fuel gauges do wander about a bit, the only true way to tell the economy is to fill the tank to the brim every-time, that's what i do. Then my misses nicks the car and uses it for work, and it comes home empty

It might be worth taking the instrument cluster out and checking the 'nuts' on the back of the temp and fuel gauges, as these always work loose and give dodgy readings.

Best i ever managed out of one tank was 420miles, very sedate driving!

Post Tue Sep 13, 2005 9:55 am

e30bmlover wrote:i put 40 pounds in my 320 in one go.....and it lasts me 2 weeks, i get about 325+ out of a tank...simply because i dont give my car a hard time. gear changes at 3,000rpm make it last!!!

I wish i didnt have a heavy right foot...........

in my 320 Ãƒ”šÃ‚£20 gets me no more that 90 miles

Post Tue Sep 13, 2005 10:13 am

dont get me wrong... i ring its neck sometimes, iv had 120 out of it once and it still kept going. i havent had it flat out yet.. any ideas what the will do. i think the book speed is 123mph.

Post Tue Sep 13, 2005 10:33 am

mine will show 130 (just on the speedo) Flat out, But my GPS (more accurate) says 119

Post Tue Sep 13, 2005 7:10 pm

iv done a hundred an ran out of road

cheers for the fuel gauge info il try it at the wekeend when i change my OBC bulb

still on the 20quid i put in sunday an i went to college and back and to the pub today so looking ok