306 TD fuel consumption.

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greg123
Posts: 50
Joined: 26 Apr 2008, 00:14

Re: 306 TD fuel consumption.

Post by greg123 » 29 May 2008, 17:44

Brisk driving mixed work, 43-45 on a 405 td, 45-47 on a 306. You'll never get direct injection miliage (Octavia 1.9tdi = 65mpg motorway), but you shouldn't be in the 30's.

Greg.
reffro wrote:I'll admit to having a heavy right foot, but on my last tank I got 34mpg out of my 306 TD. Its '96 N-reg with 120k miles and full service history. The fuel consumption has been dropping of late. I know its due for an oil change right now, when I'll also change the fuel and air filter, but is there anything else that might want looking at? (Besides me cruising at 90mph). Even at 70-75mph on the M1 the other week it only hit 40mpg, so somethings not right unless everyone else tells fibs about their fuel consumption of their 306's.

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Plumb bob
Posts: 39
Joined: 14 Sep 2007, 17:27

306 TD fuel consumption.

Post by Plumb bob » 29 May 2008, 21:42

Paulmi16 wrote: From my experience it all depends on how you drive. In the days when I had the use of company car, I used a 306dt for a couple of weeks. Around town the mpg would be excellent. However a soon as I got the open road and started using the turbo, the economy tumbled, being only a couple of mpg better than my 2.0 petrol. After I had the car the new keeper was more sedate driver and the overall mpg figure for the car showed an increase.
People who say they get over 50 or over 60 are fooling themselves. A friend who creeps round in his dt only averages 46 mpg.
My conclusion is that, if you're a 'press on driver' then a petrol engine is a better option.
Paul.

On the last few tanks I've clocked up the following, do the maths for yourselves.

700 miles on 60 litres, and the next tank and a half was 1040 miles on 86 litres.

I work that out at 53 MPG on the first tank full, and 55 MPG on the next lot.

My trip meter is accurate accoring to AA and Google Maps for the journey I do every day.

The journey is about 10 miles through town, then 40 miles on the motorway, and I travel (generally) at the maximum legal speed limit on all roads, with occasional bursts needed to overtake the odd line of traffic.

Make of it what you will, I have no reason to embellish my results.

r.welfare
Posts: 46
Joined: 12 Apr 2008, 13:01

306 TD fuel consumption.

Post by r.welfare » 30 May 2008, 09:34

I think 50mpg or more from the 1.9TD, whether 306 or 405, is pretty good. I got 700 miles out of 63 litres in my 405 from the last tank fill, mainly due to a 450-mile round trip to Bradford on motorways, going no faster than 70. The rest was all A/B-road work.

My current work route is taking me to Trowbridge in Wiltshire (70 miles each way daily), which encompasses a real mix of roads from 10 miles of single track up to the A303/A34 dual carriageways. Like Plumb Bob, that's at the legal limit on all the roads (apart from the single tracks, where it's a maximum of 45 and more like 20 round the blind corners!).

The last partial fillup for this route I did got me 410 miles from 38 litres, which I make 49mpg. I'd probably get more if I took the roof bars off! Car is serviced every 5k (last done 2k ago) with new air, oil and fuel filters. Check the tyre pressures on a weekly basis too.

I had a 2007 Saab 9-3 1.9TiD (120bhp 8-valve model) as a company car in my last job, and driving the same way I was lucky to break 50mpg for a tank (according to the trip computer). The best I ever achieved was a run up to Dumbarton in Scotland, with a stop at the Lake District - the computer reckoned 56mpg for that one. A 2007 9-3 weighs a lot more than a 1994 405, which rather negates the benefit of direct injection! I'd also say the refinement of the engine when on the move is better with the XUD :lol: If (rather than when!) my current 405s go to the Peugeot dealer in the sky, I'd probably consider a Mk1 Octavia TDI estate, if there were no suitable replacement 405s available...

greg123
Posts: 50
Joined: 26 Apr 2008, 00:14

306 TD fuel consumption.

Post by greg123 » 30 May 2008, 09:49

I make of that, that you are not going over 70mph and are not 'pressing on'. If you don't go fast and baby it, they do better, but even on long roads in about half a dozen of these I have not broken 45mpg. My friends he got 47mpg, driving the way drivers behind keep flashing their lights at you....

In comparison the heavier and more powerful Octavia tdi 110, driven hard off the roundabouts over 40 miles up to (in theory) 90mph+ where allowed and about 10 miles of town work, basically a journey that has the brakes steaming, it still managed 50mph. Driven like I normally drive the 405 it gets 60+, best of babying gets 68.

Either you drive very gentlly or your engine is something special and we should investigate what's going on with it!!!!

Greg.
Plumb bob wrote:
Paulmi16 wrote: From my experience it all depends on how you drive. In the days when I had the use of company car, I used a 306dt for a couple of weeks. Around town the mpg would be excellent. However a soon as I got the open road and started using the turbo, the economy tumbled, being only a couple of mpg better than my 2.0 petrol. After I had the car the new keeper was more sedate driver and the overall mpg figure for the car showed an increase.
People who say they get over 50 or over 60 are fooling themselves. A friend who creeps round in his dt only averages 46 mpg.
My conclusion is that, if you're a 'press on driver' then a petrol engine is a better option.
Paul.

On the last few tanks I've clocked up the following, do the maths for yourselves.

700 miles on 60 litres, and the next tank and a half was 1040 miles on 86 litres.

I work that out at 53 MPG on the first tank full, and 55 MPG on the next lot.

My trip meter is accurate accoring to AA and Google Maps for the journey I do every day.

The journey is about 10 miles through town, then 40 miles on the motorway, and I travel (generally) at the maximum legal speed limit on all roads, with occasional bursts needed to overtake the odd line of traffic.

Make of it what you will, I have no reason to embellish my results.

evilally
Posts: 744
Joined: 17 Apr 2008, 22:39
x 1

306 TD fuel consumption.

Post by evilally » 30 May 2008, 18:47

I got my 405 1.9TD in February and was a little disappointed to find I struggle to reach 45mpg on my daily commute which is mostly dual carriage way. But as my homebrew veg mix is working out at 12ppl I'm not too fussed ;)

My Clio 182 surprisingly returns 42 mpg when driven in the same manner, despite having twice the HP and tons more torque. Strangely both cars weigh about the same despite the size difference. I guess things have progressed a lot efficiency wise.

amjake
Posts: 118
Joined: 14 Nov 2004, 23:10

306 TD fuel consumption.

Post by amjake » 01 Jun 2008, 12:47

Hi All

I have 405TD estate FSH with 227,000

Daily commute of 112 return on Dual & A roads mixed regularly achieved 40-41mpg.

At 224,000 had new clutch and bits done with new tyres all round (advised by ex peugeot mech to run tyre press. at 36 all round for better wear and economy, how true??? but trialling) mpg now up to 45mpg in past 3000 mls. Average speed 70 -80 on duals and limits on A's.

Use Tesco Diesel coz every little helps them from going to the wall!! and 5p off vouchers & loyalty points (wife loves!) plus I add 1 shot Millers Diesel Plus every other tankful for injectors benefit.

Would run with veg oil 50/50 but have Lucas pump and word is that risky on seals etc. be grateful of advice on this.

Also I check the air filter regularly as quite suprising how quick it fills with crud and makes a difference on economy.

Given up on days of 90 - 100mph!! may as well give my pay packet to Tosco!!!!

Kevin

greg123
Posts: 50
Joined: 26 Apr 2008, 00:14

306 TD fuel consumption.

Post by greg123 » 01 Jun 2008, 13:42

Not risky on seals Kevin, the rotor head will sieze in the casting and snap the shaft, possibly taking the cambelt and your engine with it.

Bosch pump for any veg I'm afraid, unless you have a good twin tank kit. Bosh pump can be single tanked on a mix, or just bunged in the tank if you wish to get poor mpg and be unkind to the engine! I run a heat exchanger, higher temp heated fuel filter, advanced pump timing and modded injectors and should really have a lift pump and closed loop front end - that lot doesn't cost that much and you'd be amazed how much better it runs on veg than just 'bunging it in the tank' whcih, from a mechanic's point of view specialising in veg systems, isn't very good.

Greg.
amjake wrote:Hi All

I have 405TD estate FSH with 227,000

Daily commute of 112 return on Dual & A roads mixed regularly achieved 40-41mpg.

At 224,000 had new clutch and bits done with new tyres all round (advised by ex peugeot mech to run tyre press. at 36 all round for better wear and economy, how true??? but trialling) mpg now up to 45mpg in past 3000 mls. Average speed 70 -80 on duals and limits on A's.

Use Tesco Diesel coz every little helps them from going to the wall!! and 5p off vouchers & loyalty points (wife loves!) plus I add 1 shot Millers Diesel Plus every other tankful for injectors benefit.

Would run with veg oil 50/50 but have Lucas pump and word is that risky on seals etc. be grateful of advice on this.

Also I check the air filter regularly as quite suprising how quick it fills with crud and makes a difference on economy.

Given up on days of 90 - 100mph!! may as well give my pay packet to Tosco!!!!

Kevin

driversdomainuk
Posts: 3
Joined: 25 Jun 2008, 21:51

306 TD fuel consumption.

Post by driversdomainuk » 26 Jun 2008, 09:17

My 207 GT 1.6HDI

40mpg around town
50mpg on motorway
60mpg on rural roads

Not great - esp. around town but rural roads it is great