Xant MPG!!!!!!!!

paranoid · Post by **paranoid** » 15 Jun 2005, 03:05

Not a problem at all but my recently bought Xantia td is doing 46 MPg
Yippppeeeeeeeeee

last week put £10 worth of diesel in at 92p a litre and managed 109 miles just tootling about around town and the couple of miles to and from work
If I have worked it out wrong please feel free to shoot me down in flames[:I]

bencowell · Post by **bencowell** » 15 Jun 2005, 03:19

The best way to measure MPG is to fill the tank until you can see the fuel, drive, drive some more, keep driving until the red light is on then go to the same pump and fill again until you can see the fuel, then work out the consumption.

paranoid · Post by **paranoid** » 15 Jun 2005, 03:32

I have been[:)] exactly the same pump the last 4 times

Kowalski · Post by **Kowalski** » 15 Jun 2005, 04:12

My calculations agree with yours, although there is a bit of optimistic rounding going on [;)]
My '97 Xantia does very similar figures, at the minute its doing about 47-48 but my driving style and the roads I'm on obviously aren't the same. New tyres have just been fitted to the front and I'm sure I'll find out soon what difference (if any) they've made.

JohnT · Post by **JohnT** » 15 Jun 2005, 04:17

By my rough calculations you paid around £4.22 a gallon (very expensive!) You bought 2.36 gallons divided in to 109 miles is 46mpg. My brain hurts!

paranoid · Post by **paranoid** » 15 Jun 2005, 13:05

Ahh......Its now 91.9p a litre but I think it has been 88-89p

Post by **RichardW** » 15 Jun 2005, 13:07

47 - 48? How??
At a steady 3000 rpm, both of mine have just dipped below 40. Currently trying to keep it below 3000 in normal driving, avoiding booting it, limiting cruising rpm to 2,600, aiming for 2000 rpm where possible. This is a) boring and b) only giving about 43 MPG (mostly open roads with a few towns to go though to/from work).
Mind you, I'm a fat bloater....

Kowalski · Post by **Kowalski** » 15 Jun 2005, 15:03

How?
Take the catalyst off and make sure the tyres are blown up to the correct pressure. Turn the aircon off, close the windows and cruise at a constant speed up hill and down. My other Xantia does about 43mpg on the same route it has smaller wheels so its overall gearing isn't the same and it doesn't have the electronic timing control so its timing may not be spot on. I've heard people say that if your timing isn't absolutely perfect on a diesel the mpg goes off.

JohnT · Post by **JohnT** » 15 Jun 2005, 15:44

All my Xantias have returned 43mpg+ under local and distance driving. I do not take any special care in driving style, just normal. It looks as though your car does have a problem especially if you are driving with a consideration to economy. I assume you have looked to the obvious as Kowalski suggests, and check the air filter, check for exhaust restrictions, like a collapsed baffle etc.

paranoid · Post by **paranoid** » 15 Jun 2005, 22:29

My old Rover 416 (K reg) was a great car but the Mpg was absolutely crap,30 mpg absolute maximun I ever got at a steady 60 barely touching the throttle, the only reason I got rid in the end after 5 very reliable years in fact.
But if the tyres lost any pressure it would hit economy even more, I have found with the diesel if you plan the overtaking on the motorway well in advance you hardly have to put your toe down much.

splat · Post by **splat** » 15 Jun 2005, 22:57

I get 40-44MPG seemingly irrespective of driving style, which varies quite a lot depending on how fed up I am. The only thing that really hits it is towing.

JohnD · Post by **JohnD** » 15 Jun 2005, 23:15

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by splat</i>
The only thing that really hits it is towing.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Mine too! It's a 2.1 estate with a VanAaken box and from 1 months end to the next, does 42mpg, except when it tows, then it's down to 31mpg. BUT - in several ways I've proved the mileometer and speedo reads 5% over - so where does that leave the economy figures?

Kowalski · Post by **Kowalski** » 16 Jun 2005, 02:28

If the speedo reads 5% over, you're economy figures are over by the same amount too.
42 mpg becomes 40mpg and 31 becomes 28, oh dear.

THELABMAN · Post by **THELABMAN** » 16 Jun 2005, 03:02

Hi,
I'm on my second Xantia 1.9TD 1st was a 95 N plate with a reconditoned engine(written of in bump), the second is a Mk2 99 T and I reckoned on getting 11 miles for each pound of fuel put in both of them, I've only brimmed the new one once and it gave 43MPG, the old one I done a few times over the 3 years I had her and it was allways between 42 - 45MPG.

stewart_c · Post by **stewart_c** » 16 Jun 2005, 03:15

Hi
I am begining to feel I have a special one as nornal consumption is 50-52 with no special driving considerations as to economy,and it goes down to around 46 on the anual 500 mile tow to Cornwall[8D]