2012 Jaguar XF Supercharged Alaska Road Trip: Tricky Tank
September 19, 2012
One of the main concerns we had with taking our 2012 Jag XF Supercharged on a 7,000+ mile road trip, was the range. The EPA says that our Jag has a max range of 282 and the furthest we'd ever managed on a tank was 265.2. During that 265.2 mile tank, the driver said that he'd driven it as gently as possible had filled up when the needle read nearly zero. Still, he only managed to put 12.575 gallons of fuel in for an overall fuel economy rating of 21.1 mpg.
12.575 gallons in an 18.4 gallon tank? And it read empty? What gives?
Well, for starters, the Jag is a bit of a wuss.
As you can see in the quick shot of the Jag's owner's manual, when the needle reads empty, there's a reserve fuel capacity of 1.5 gallons.
So already your hamstrung on capacity, but the Jag takes it one step further and does a fairly poor job at estimating your range. This means that when the Jag gets all panicky and tells you to fill up, you've likely got another 40-50 miles left at minimum.
We assumed that the estimated range would increase as we started on our long, long highway slogs, but we had no idea by how much, and no idea if we could even beat that 21.1 mpg trip.
One final sticking point was what to do if we ran out of fuel. See, the manual says that once you run out, you need two gallons of fuel to get things started again and our can was a simple 1-galloner. We decided to play it safe: 1) If we were below 1/2 a tank and the next fueling station was more than 100 miles away, we fill up. 2) If the warning turned red (we assumed it would turn red when you hit the reserve tank) instead of yellow, we'd add the extra gallon before running out and limp to the next station as slowly/efficiently as possible.
30 potential fillups on one road trip. Stopping is a-productive, once we stopped playing in Death Valley, we focused on range. Any guesses as to how many fillups it actually took?
Mike Magrath, Features Editor