GX550 Real World MPG

[Redbird99]

Are you guys refreshing or restarting your truck's mileage computer while you are up & cruising on the highway, or are you restarting it (zeroing it out) immediately after filling up at the gas station pump?

I typically reset my trip meter each time I fill up, at the pump. However, I'm still on the first tank, so I haven't touched it. I also calculate by gallons pumped and miles driven.

Apparently, the GX trip computer calculates each 'session' of driving. I'm not used to such fanciness, but I'll take it.

 

[Bluegill]

I reset my "current" and "history" mpg after every fill-up, that way I see what the truck is calculating for that particular tank of fuel. It's under "Trip Information" under one of the settings menus.

A "trick" for really good mileage would be to reset the "history" while you're cruising along the highway at 65 mph. Then you don't get the penalty of city driving or accelerating up the on-ramp factored into your mileage.

I filled up yesterday morning, reset the truck's mpg history, and then cruised about 40 miles across town on the highway. I was at about 9.5 mpg for the mile or two from Costco gas to the highway. I set my cruise control at 65 mph, got in the slow lane, and cruise controlled the whole way. I got up to 18.7 mpg indicated, which is just over 20 mpg when I adjust up 7% for my larger tires. That's definitely an all-time high. I did accelerate up to about 80 mph to pass one big truck hauling dirt and blowing it all over the highway and I watched in horror as my mileage dropped off a cliff.

Then I went another 10 miles or so on surface streets and spent about 4 hours at 2 job sites, starting and stopping dozens of times and driving around a couple miles off road inspecting drainage features at big box Amazon warehouses. My mileage was in the 15s when I headed home.

 

[Redbird99]

I just did my first fill up today. The computer said my average MPG was 16.2, my calculated was 16.3 for overall, so, pretty close agreement. Overall, it was not bad as far as average, given that I spent some time at idle while I trying to figure out some of the stuff in the infotainment section.

 

[Redbird99]

Update to my MPG.

We went on a 400 mile trip to my sister's home. I filled up about 50 miles into the trip, and again after we got there. The first fill up was about 17.5 MPG, a combination of around town and highway. When I filled up after getting there, I calculated 19.5 MPG. Trip computer said 18.6. The tank took just over 17 gallons, and said I had 20 miles to empty.

I have 1404 miles.