Just come back from my latest run to cornwall in the sdi , went down last friday and seems to have been my most economical run ever as it covered 400miles on half a tank

ok the actual mpg when i checked on the refill was 67(lots of hills plus wind) but it must have been getting close to 80mpg on the run down .

seems to have improved since changing the rear wishbone bushes and getting it tracked up (the front tyres used to scrub badly) plus getting a new battery (i think the old one was permanently needing heavy charging so the alternator drag may not have helped)

The only other thing ive done is an oil and filter change plus a fuel and cabin filter change but i cant understand this improvement maybe its losening up at 86k!

i'd say 80mpg isn't possible, VW claimed that sort of figure on that special lupo with aluminium panels, special gearing and a small SDi engine so i don't think a fabia would do it.

do you brim the tank and do the vent pipe thingy?

Good result, see if you can get the same results on the way back up the hill

yep i did vent the tank but didnt try too hard to fill 100% , there was no movement at all in the gauge for 100 miles or so (untill the m42) btw I drove at about 2800 rpm or just around 70 but sped up to iron out the hills , usually the gauge is abit below the half way mark when i get to St Agnes and i do belive i was at least getting close to 80mpg, there was a north wind , maybe that helped btw 65ish on the return journey:)

i'd say 80mpg isn't possible, VW claimed that sort of figure on that special lupo with aluminium panels, special gearing and a small SDi engine so i don't think a fabia would do it.

This is measured under laboratory conditions though. I can easily get high mpg is I'm driving down lots of hills with a following wind as I'd hardly touch the throttle, so somewhere in the order of 80mpg isn't unheard of, but would be very difficult to consistently reproduce and nigh on impossible in lab conditions....

Chris

interesting article here on an avensis going from jhon o groats to lands end on 1 tank averaging >75mpg (lower official mpg figures than mine)

Avensis Diesel Returns 75mpg

I drove down to leeds and back with the cruise set at 70 and got 400 miles from a unvented tank, i dont know how you would of get 80 mpg :S

I drove down to leeds and back with the cruise set at 70 and got 400 miles from a unvented tank, i dont know how you would of get 80 mpg :S

Thats whats confusing me as well when i got the car i would get 440 to 480 to the beeper (not to the tank) now im well over that, anyway going back down in two weeks but with a bigger load so i will see what happens

Not obsessed with mpg but it does allow me to get down to my caravan in cornwall alot more often

My mum some how manages to squease over 65mpg (according to car trip info) out of my car... that is up and down hills and along the M25. Maybe it is possible in a sdi.

I imagine you would have to be going very very slowly!

My mum some how manages to squease over 65mpg (according to car trip info) out of my car... that is up and down hills and along the M25. Maybe it is possible in a sdi.

I imagine you would have to be going very very slowly!

The thing with the sdi is , go too slowly and you lose momentum up hills having to compensate with the right foot plus i like to stick to 6hrs or less on my trips to Cornwall so i tend to stick around 70 but build up speed before inclines

I got 68.5mpg average (on the trip) on a 60 mile journey the other day and managed to squeeze 500 miles out of a perfectly normal tank on my Fabia VRS... how's that?!

I got 68.5mpg average (on the trip) on a 60 mile journey the other day and managed to squeeze 500 miles out of a perfectly normal tank on my Fabia VRS... how's that?!

Were people dieing of old age in the que of traffic behind you? :P

From sheffield to halifax and back twice I got 62mpg. Lots of uphills and downhills and I wasn't going slow as there is a lot of NSL areas.

I went from Gatwick to Portsmouth and back once, computer reported some 84 odd mpg.

That was a TDi100

My mum some how manages to squease over 65mpg (according to car trip info) out of my car... that is up and down hills and along the M25. Maybe it is possible in a sdi.

I imagine you would have to be going very very slowly!

My vRS MFD has shown a return upwards of 65 mpg on my daily commute! I cover about 40miles a day up and down the A10 between Ely and (just north of) Downham market. That is at an average speed of 50mph because of the tractors and HGVs though.

For those who like doing the maths it was 625 miles out of a tankful (vent method but leaving a little room for expansion) about 46-47 litres.

Whenever I go on a long trip I make sure that I brim the tank and then do the same at the other end. I can usually get 63 mpg easily.

I went from Newcastle to Cheltenham recently at 70mph and got 68mpg! On the way back I was running around 75mph and got 63mpg. It is far and away the most economical car I've ever had and I've been driving since 1970. It is the first diesel though. Long ago, I used to have a 100 hp Lancia Beta Twin Choke 1.8 litre and that would do about 20mpg at the same speed. If you drove that Lancia at 55mpg it went up to 24mpg on a run.

if you find the sweet point then i guess it can be done.

hello all,went to plymouth thursday from rochdale.there and back is exactly 600miles.when i got back trip computer indicated 110miles remaining! i vented the tank and average speed was 63mph not bad considering how windy it was going down on thursday

80 is fetching it.... Having said that my car got 65mpg on a 160 mile round trip to Poole on Sunday. But this was mainly 60mph cruising on the A35, mainly in traffic. And my car is currently reading 450+ miles done on this tank of diesel, and the car is a fair way still off the beeper going BEEEEEEEEEEEP! So I think I might be heading for a 600 mile tank (if I ran it dry)

With an empty 1.4TDi it is easy to get 80 for a single trip given the right weather and traffic so that you travel at 60mph. Of course it all goes to pieces when you turn round, carry passengers, get up to 70 etc. Overall in 86K miles, I've averaged just about 70 with most on flat M56.

V

SWMBO gets 70+mpg from her TDI 100 on longer motorway/A-road runs (if she's nice to it, and sticks under 70).

I managed an average 62 mpg on a recent 700 mile round trip to Cornwall in a PD100. The most I've managed from one tank (straight fill, no fancy ventectomy stuff) is 550 miles - it took 42 litres to fill up after that. Even in the very heavy South London rush hour traffic I usually drive in, I manage around 50 mpg so I'm very pleased with the economy.

What is this "venting" of the tank you speak of?

I just fill up until it clicks off.

Has anyone tried Shells V power diesel? I have and find i get around 10% extra / gallon of fuel. On a long run I can get around 60mpg and knocking around the doors get 48-52mpg:).

some interesting responses, i had a go on the way home form work to see what the max i could get was... 56mph.... cruise set... 82mpg.... one bored driver!