Gday guys, I’ve got a 2018 SR Dual Cab 2.8 Auto. Standard suspension, Mickey Thompson ATZ P3’s 265/70/17 on King D Locker steel rims. Ironman Winch bar and Side rails (no winch yet,) factory heavy duty alloy tray, Mini Canopy carrying 4x 20L jerry cans of diesel and 1 x 20L jerry can of water as well as work luggage and jumper cables etc, approx 180 - 200kgs most days, factory tow bar, Safari Armax Snorkel, Stedi Type X Pro spotties and 3303 light bar.
I’ve found a lot of the same issues mentioned with the fuel economy, Power/Eco and lack of holding in 6th gear above 100km/hr. I seem to notice the economy depends more on the terrain (uphill or flat) than it does on whether I’m light on the pedal or not. This is reinforced by the fact that I do 90% plus highway driving and on cruise control, thus eliminating the pedal technique theory.
I have also tested the difference between running the Mickey Thompson Atz’s (265/70/17) Vs the factory Yoky Geolandars (265/65/17) and I estimate the MT’s use around 0.5L/100 to 1.0L/100 more than the factory Yokies taking into consideration wind, terrain, weight of fuel load factors etc. Comfort wise, the steering is obviously a little lighter and the ride is a bit more comfortable (slightly softer.) These factors I think are pretty reasonable, considering the Yokies are a highway tyre and the MT’s are a much heavier duty 10ply aggressive all terrain light truck tyre. Many are reporting 85 - 100,000kms out of these tyres with no issues after consistent rotation.
Back to the fuel thing, being a brand new car it has only done 3000 kms, as mentioned 90% highway and as a result, no sign of DPF light or any symptoms (yet)..
One thing I have noticed, with the auto transmission which I find unusual, is that if I throttle to 105km/hr and activate cruise control in 5th gear it will hold 5th gear and not change into 6th. However, if I throttle past 105km/h to 110km/hr and slightly back the throttle off, the trans will change into 6th and settle at 105km/hr.. if I activate the cruise control there, it will maintain 105km/hr but will use 5th gear when needed (uphill) and return back to 6th on the flat. So why do I have to get the trans to find 6th above 105km/hr first? What does the trans use to decide what gear to be in?.. seems odd to me. And the Eco mode seems almost completely useless (fuel economy wise) at any speeds over 100km/hr.
As a rough average on varied highway terrain, you could basically say my economy averages are:
100km/hr = 10.5L/100kms
110km/hr = 11.5L/100kms
120km/hr = 12.5L/100kms
130km/hr = 13.5L/100kms
These figures are based on the averages reading on the dash, which is based on the fuel gauge and distance to empty.. which we all know isn’t very accurate at all. In the coming weeks I will be using the trip meters to calculate my ‘actual usage’
Yesterday I travelled 595km averaging 105km/hr and today put around 70l back in. This would indicate around 650km/80L or 12.3L/100kms... which is a little higher than the computer average was displaying.
Has anyone else experienced these issues or found ways around them?
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