MPG Update...
We've put another 1200 miles on the Tiger the past 2 weeks. I've been trying to get an accurate gauge of our MPG. It's a little difficult to get exact numbers due to the length of the fuel filler hose. I'm still not sure exactly how much it holds. The other day I pulled into a gas station with the fuel gauge on "E" and pumped 28 gallons into the 27 gallon tank. I doubt I was running on fumes so I'm guessing the filler line could be capable of holding an additional 2+ gallons? As I've said before, it's hard to tell if the tank and fuel line are completely full due to the routing of the fuel line. Anyway, I'm accounting for the extra fuel in my calculations so these numbers should be "worst case"...
With the old "C" rated tires, we were mostly taking back roads, taking things slow and keeping the load as light as possible due to the squirrelly ride. With that combination we seemed to get right around 16mpg.
Now, with the new tires, we're able to comfortably drive SoCal freeway speeds and carry a "full" load (full water tanks, tools, camping gear, dogs, etc). On our recent Anza Borrego trip we spent much of our time either on steep mountain grades or creeping along, offroad, in 1st or 2nd gear. Our avg. MPG on that trip was 13mpg. This week I took the 101 and PCH up past Santa Barbara for some coastal camping. To keep up with the flow of traffic, I set the cruise control at 70-75mph for most of the trip. My avg., again, was 13mpg. Personally, I think the "magic" speed for the Tiger is going to be somewhere around 60mph. I'm guessing the mpg at that speed and with a heavy load will be in the 14-15mpg range. It'll cruise at 70+ just fine but it takes a
lot of extra fuel to push it through the air at 70 vs. 60.
FWIW- All of the above MPG calculations were done using GPS.