Put 18.2 gallons of premium in mine the other day, was just wondering how close I was to walking.

 

I believe it takes 20 us gallons

 

I was thinking 21.3. I've put 20.3 and 20.2 in mine before, with lots of 19+ gal fill-ups.

 

My handbook says 80 litres. Not sure if that is "usable" or a "dry fill"???.

Fuel pumps are too expensive and waaaaay too hard to change to test it.

 

Wow, didn't realize it had that much left. The "range" reading kept going from 0 to 1 for the last 4-5 miles, as I hyper-miled my way to the gas station. I was sweating it.

PS: 80 liters works out to 21.13 US gallons.

 

I'm a little on the **** side at tracking fuel comings and goings...but having admitted that, I can tell you over the past year of X300 ownership, if I take the computed mpg from a fill-up and multiply it by my assumed 21.3 gal capacity (seem to recall 81L from the disc) I get a min range of 385 mi, a max of 513, and average of 438. It would be a wee bit lesser if the actual # is 21.1. Then again, I have significant highway mileage on most tankfuls. Avg fillup is 16.5 gal and occurs every 4.5 calendar days, FWIW.

 

The "Vehicle Care" manual says that there is 19.8 US gallons from Full to the Empty mark and there is an unidicated capacity of 1.6 gallons below that for a total refill capacity of 21.4 gallons.

One of the other manuals shows that there is 2 gallons remaining when the low fuel light comes on.

 

Felt a bit daring today. Fill-up was 19.2 gallons.

 

I am with most of the people here, the most i put is around 20 gallons.

 

Why are you guys filling your tank?
I can understand it if you drive so much that you empty the tank every 2 days but otherwise you are just wasting money. I mean to say, would you fill a 10 gallon barrel with water and put it on your back seat? No you wouldn't. Not if you are sensible anyway. If there's no need to carry the extra load, why do it.
Try this.
If you know that, starting with a full tank, a trip of X miles leaves you a RANGE marker of 250 miles, take the same journey but starting with half a tank. (obviously, this only works if you know that you can complete the journey on half a tank of petrol) Now see how much greater your gas mileage is compared to starting with a full tank. It may only save you half a gallon each full tank but that's 10 miles of free motoring, lol

 

I seldom fill my tank simply because it's shameful for a grown man to cry in public :-)

Actually it takes too much time. Filling the tank is very boring. I have a Gas-Coffee-Cigarettes routine: whenever I need one, I always get some of the other two. I usually get gas about $50 at a time.

Cheers
DD

 

So, Doug; You don't subscribe to the "full tank makes the pump last longer" theory?

FWIW, neither do I. If that was true, my cars would be plagued by bad fuel pumps, which they are not. And that pretty much goes for 10% Ethanol, which we have had here in Atlanta by law for many years now.

 

Oh, geez......there are SO many "theories" out there that I don't subscribe to. They might make sense in conversation and may have some amount of actual truth but, in real life, I just don't see or experience them. And it appears that lots of others don't see or experience them, either.

The ethanol thing has now been politicized, making matters worse. "Enviro-nuts, democrats, and Communists, acting on direct orders from President Obama, seek to destroy your car with ethanol" type of thing.

Good grief! :-)

Cheers
DD

 

Apparently gets worse with age.

My tank capacity out strips my wallet capacity at $165 for a full fill.

 

I noticed that all the websites like Edmunds and Autotrader say the the xj6 has a 23 gallon tank.

 

If I'm being really honest here, my Jaguar is just a toy. Now that I'm back up to 90% fitness I just tootle round town once a week and then give her a good spanking on the local motorway for about 25 miles to get rid of the cobwebs. I put £10 worth of petrol in when we start and there's usually a tad more Go Juice in the tank when we finish than when we started.
Our every day car is a Nissan Note Tekna 1.6 automatic and the tank is full to the brim when about £47 is showing on the petrol pump. That will keep me going for a week at 57 MPG. But the average jumps up to 61 MPG if I put £10 worth of petrol in at a time.

 

I dig the "Hyper-Miling".
Who needs a hybrid if you just use your brakes to slow down. Not the tranny. Am I correct here?
Any feedback would be appreciated.

Thanks,
Chris

 

Sounds tossy, but I don't care (at the moment) about the price of gas, or my MPG. However I am an anorak and I monitor it because I like to know. My 3.2 X300 uses the same gas as my previous daily driver (4 litre Ford) and our other car, 3 litre Tribeca Subaru - all do 16mpg round town, 25mpg on a long run, and about 20mpg on a mixed 2x 15km daily commute (this is Imperial gallons, ie: 4.5 litres)

My Daimler, bought in February, is now my daily driver so it has to be reliable. Hence it has, ironically, spent 3 weeks at the Daimler Doctor (his car number plate is "JAG DR") getting niggles ironed out.
In this time I have resorted to my previous daily driver, 2002 Ford Falcon estate/wagon. It never breaks down. My kids (luckily) wouldn't let me sell it.

So I have figured that the solution is what they said in the 70s - if you want a Jag, you need two.
I need to sell my Falcon, and get another Coventry car. There are two I have an eye on in NZ - a good low-miles V12 Double Six Daimler and a nice XJR which popped up last night on the web. I am torn. I want a blower, but a good V12 with AJ6 Engineering enhancements really appeals too

Incidentally, back from my tangent, I can get about 60 litres in my tank, I am too scared to run out and have air locks, tank debris up the fuel line, etc. As a daily driver, I like lots of gas in my tank. It might even save my life if there's a tsunami (I live about 4metres above sea level). I like 60 litres, as it makes the maths easy when I squirt in 1.9 mL/L of 2 stroke outboard oil !

thinking about some of the replies above, re- improved economy with a half-fill:
Me plus X300 is about 1900-2000 kg
80 litres of petrol weighs about 60kg (specific gravity of petrol is 0.71-0.77 kg/L according to google).
And 20 litres is about 15 kg
I struggle to believe that 45 kg is of any significance when already hauling 2 tonnes around... (2-3%).
There is a major confounding factor not mentioned - the lesser application of pressure upon one's accelerator pedal when one wants to reach Home in one's Jaguar with only a few litres of fuel sloshing around at the bottom of one's 80-ish litre tank! Those of us with mucho fuelo putta the boot down, and have fun.

 

That was one of the things I was thinking when I read the theory of less gas equaling less weight. The other thought was "I don't have the time or desire to stop at a gas station twice as often". I've got betteer things to do, just ask my wife!

 

Yup, that's right! By the way, all the extra fuel consumption to actually get to the petrol station, then queue up, switch off the engine, start it up again... Pointless :P