Wayne, you're getting what I'm getting on the highway at about 95 kph. But most importantly, have you factored in tire size and do you know your odometer is accurate?
To all the Aussies, I am seriously beginning to think that you are getting fuel at and excessive temperature, high temp fuel will have much less energy than that served at 15C. Or maybe your diesel quality is much poorer than ours!
One thing to remeber as well is that 1HZ indirect injected normally aspirated engines are by design a bit less fuel efficient than the 1HD-T direct injected, turbo-charged version.
I've been getting consistently around 10.5 - 11 litres per 100 km for the whole summer doing medium short runs (no bumper to bumper or strictly city in that, though, most runs are about 30km or so).
Pure highway at a mellow 90-100 returns about 9.6 to 10 l/100 (based on about 6 test runs) and I've even attained 9.4 l/100 once (about 32 miles per imperial gallon!)
Finally, pure highway at a constant 115kph returned a fuel consumption figure of approximately 11.8 l/100 (one test run)
Maybe we should take pictures of our odometers, our tires, fuel stations and fill-up figures, level of fuel in the filler neck... Maybe that would settle the controversy!
