Hi all,
I have a 2000(W) 306 HDi, which i purchased recently. I was after a car that would be very fuel efficient and after reading that the 306 HDi can return on average an impressive 55.4mpg.
I was concerned when i found my fuel needle was approaching reserve a lot earlier than expected. I calculated that i was getting on average a very poor 30mpg!!!
Can anyone please help me to find what is going wrong or if there are any other 'tell tale' signs that i should be looking for?
Thanks in advance
SLT
Edited by Pugugly {P} on 07/10/2007 at 21:24
|
For a start, make sure your calculations are meaningful. Using a single journey or a single tankful is a waste of time. I suggest you record every drop of fuel used in a reasonable time period ~ say a month. Fill the tank to the brim and record the odometer reading. Then record all the fuel put in during the test period, making sure that the final filling is also to the brim, and record the final odometer reading. Also be aware that, on your own admission, the claimed 55.4 mpg is an average. That may mean an average of several cars, several drivers, several seasons of the year, several types of journey etc etc. What was the source of the claimed average?
--
L\'escargot.
|
I can't help thinking that you'd really need to go some to get a 306 HDi down to 30 mpg, but as L'escargot says, the answer really depends on what journeys you did, and how many tankfuls this was calculated over.
For what it's worth, I could beat my old XUD engined 306 D-Turbo down to 35 or so, but never 30, and the HDi engine is far more fuel efficient.
One of the popular misconceptions of modern turbodiesels is that they are frugal even when driven hard. This is not the case. Driving style, road and traffic conditions can easily make 25 mpg difference with a modern diesel.
Cheers
DP
--
04 Grand Scenic 1.9 dCi Dynamique
00 Mondeo 1.8TD LX
|
|
|
My calculations were based on just over 21 litres (£20 approx.) on two occasions, on both occasions. In total i covered 430 in total of which 420 were motorway miles , i refilled the tank as soon as the reserve light came on. According to the handbook and Parkers i should be getting aound 65mpg (motorway), which equates to 300+ motorway miles with 20 litres of fuel.
I do not drive it hard at all, i purchased the HDi becaue i cover alot of miles, and therefore i drive economically to get the most out of the fuel.
I have also just found out that the cat on my pug has collapsed, and therefore need a new one, does this affect the mpg?
Sorry for my original question being brief as this is my first time using discussion forums.
Thanks in advance
|
My calculations were based on just over 21 litres (£20 approx.) on two occasions on both occasions. In total i covered 430 ......
Does that mean 2x21 litres for 430 miles? That's 46 mpg.
--
L\'escargot.
|
Does that mean 2x21 litres for 430 miles? That's 46 mpg.
I'm still dubious abut your calculations. Are you sure you've got it right ~ it's well known that it's easy to repeat calculations over and over and again and keep making the same mistake.
--
L\'escargot.
|
|
|
|
|
|
You don't say what sort of driving you do!!
|
Over a period of several years, always using brim-to-brim calculations, my 306 X-reg (2000) HDi has achieved 53 - 57 mpg on a mixture of short and long journeys, motorway and minor roads, continental driving etc, etc. I think I'm usually fairly gentle with the right foot, but I do boot it from time to time.
Soon after I bought it, and when therefore it was too early to have established what the fuel economy was like, my trusted indie cleared a lot of muck and water out of the fuel filters and the engine responsiveness increased. I have usually put Miller's in and recently switched to Miller's Sport, with resulting improvements in both responsiveness and economy. (Apologies to those who, according to recent posts, think this stuff is snake oil; I beg to differ.)
I'm not enough of an expert to know what might be the OP's problem, but I would support the comments above that you need to do mpg checks brim-to-brim and over a period of time to find out where you really stand.
Is the car running OK? If not, getting that sorted out would be a start. Brakes binding? Under-inflated tyres?
|
" have also just found out that the cat on my pug has collapsed"
A collapsed cat will certainly screw it.
Happy now ???
Edited by Pugugly {P} on 10/10/2007 at 20:39
|
Stop mucking us about!!My reply was on the fuel consumption site.
Give a chap a chance ! Meant splitting the thread in three, moving to other forums and then splicing the answers back into the correct posts...and they don't teach that in Mod School....Good Grief !!!
Edited by Pugugly {P} on 10/10/2007 at 20:40
|
I bring your attention to the above title, my original question was regarding fuel economy, my engine is not cutting out, therefore i dont understand what you are doing by splitting the threads.
Can you not leave this thread for messages regarding fuel consumption?
Sorry, normally changed as a matter of course - dunno how that happened !
Edited by Pugugly {P} on 10/10/2007 at 20:41
|
So, can anyone tell me whether or not a damaged CAT can make a big difference on my HDi's fuel economy?
Thanks again in advance
|
|
8th.OCTOBER 19.19!!!!!!!!!!!!!!!!!!
|
|
Indeed JC2. I thought that myself when the OP reposted.
|
|
|
|
Hi
drop in miles per gallon can be a number of things, simple first dirty air filter, leak in fuel supply line, poor quality fuel.
it may also indicate that your AC unit needs serviced.
your HDI should return 55 m.g easy
|
|
|
|
|
