How many people calculate their true MPG by hand and compare it to the trip computer?
My trip computer ALWAYS grossly overestimates the MPG I'm getting. It's usually not even close to the actual MPG.
I drove 412 miles on my last tank...
- Trip computer said 35.0 MPG.
- Actual gas mileage was 32.5 MPG. It overstated the fuel economy by 2.5 MPG!
That has been the most egregious overstatement, though it is almost always off by 1.5 - 2.0 MPG.
My guess is the Mazda engineers (correctly) assume most owners do not check their mileage by hand.
So they can program the trip computer to state wildly optimistic MPG numbers, and consumers will be none the wiser.
My trip computer ALWAYS grossly overestimates the MPG I'm getting. It's usually not even close to the actual MPG.
I drove 412 miles on my last tank...
- Trip computer said 35.0 MPG.
- Actual gas mileage was 32.5 MPG. It overstated the fuel economy by 2.5 MPG!
That has been the most egregious overstatement, though it is almost always off by 1.5 - 2.0 MPG.
My guess is the Mazda engineers (correctly) assume most owners do not check their mileage by hand.
So they can program the trip computer to state wildly optimistic MPG numbers, and consumers will be none the wiser.