Fuel Economy - lack of.

[VladTepes]

300Tdi Defender 130 (1994).

I have had it "tickled" by M.R. Auto for a bit of extra power (that's a laugth when talking about a Tdi) anyway...

Current consumption is 13.16 litres / 100 km. (mostly unladen)

I'd hope for 10-10.5 l /100km based on others experience.

http://www.aulro.com/afvb/general-chat/58136-300tdi-fuel-economy.html

Umm, help.

What should I be looking at / for ?

[DFNDR90]

What should I be looking at / for ?

A Td5.
;)

[isuzu110]

My 110 SW get's very similar figures to yours and has also had an MR Tickle.

http://www.emotasia.com/wp-content/uploads/mr-tickle.jpg

Mine was tickled shortly after buying it so don't have a baseline to compare it to.

[scott oz]

I had a 200 TDI disco and a 200TDI defender till it rolled. I believe you should be able to mid 10L per 100 or better sitting on 100k/Hr.

My currrent TD5 in city trafic every day gets 10.5L/100k's

[omy130]

All mine has is the 'tickle', K&N air filter & standard exhaust to 1st muffler, flow thur muffler & 2 1/2" standard bend exhaust. No 2nd muffler. I have adjusted the tappets a couple of times over the 200 thousand k's I've owned it.

I normally don't bury the foot @ hills, just a squeeze & let the motor do the rest.

Unladen, both city & hiway (105 max) 10 1/2 lts/100k's, can get sub 10's on hiway.

Last trip away 1100k's dirt, ute full & family with a/c on most the way. 100 kmh tops, 11 1/2ltr.
Last trip away 3000k's unladen, NSW 110 kmh freeways, hilly & having fun, 11 lts/100.

PS: unsure if it's a difference. Running 255/85/16 & trip meter is running true.

This all changes once I put a heavy trailer on though.

[scanfor]

Mine is a 99 300Tdi - had it from new.

For the first five years of its life, it was a daily use company car, and returned 10l/100km day-in, day-out around town.
It use 12l/100km on the highway when laden.

Now around 11 years old, fuel economy is 12l/100km around town.
Also been MR tweeked.

Two possibilities:

1. Diesel fuel energy per liter has deteriorated over the past 10 years (this is quite likely as when I used BP ultimate diesel, I do get improved economy)

2. Fuel components (pump, injectors etc.) getting old and worn

[triso]

Ive had an intercooler upgrage and pump tweek and get better economy than before, even in the 9.7L/100 range driving 50/50 rural/town but mainly 10L/100

it got 219000K's and 235/85/16s

cheers tristan

[flagg]

Used to get 14L/100k in a '92 200tdi Deefer, then had the injectors done at 180 000km.. brought it back to 11, and gave more power (felt like a new engine!). The injector service cost $1100 though (in 2001) so took a while to make that back on a fuel consumption / costs comparison.....

This was a bog standard unit...

[Brid]

I've had defenders the last couple of vehicles, but a 300TDI disco before then.

I just looked up all old records on it, and it averaged around 8.5L/100km over 210,000kms...by far the most economical of my vehicles.
Brid

[dromader driver]

Tray back defender around town on 750/16 XZA burns around 9.5 litres/ 100km and SYD-BNE flat out urgent trip 10litres /100km.

Brother in laws Disco does slightly more in consumption but then he doesn't have the streamlined shape of the defender....

don't drive it over 100km/hr otherwise burn increases significantly.

:twisted:

[langy]

A boost gauge can help - sort of a visual reminder to ease off the gas when you don't have to be at max power.

And, check that your odo is accurate - even though 235/85 are standard, if you have different tyres it can throw your calculations off.

All the normal things with a turbo diesel: hoses, clips, intake manifold gasket, intercooler and wastegate ( inc the fitting for the injector pump).

A big dose (ie a whole bottle of Moreys...) of diesel injector cleaner

Even with the 1.44 TC, you should be able to shave a couple of points off 13/100.

[Chucaro]

Have a look THIS (http://www.aulro.com/afvb/general-chat/98825-i-love-tdi300.html) tread

I think that the best bet will be to blow 2 weeks holidays and go and see Mr Cooper :)

[VladTepes]

My holidays are no convertible to cash, though.