Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Wow, just wow....
I just don't worry too much about it being a mile per gallon higher. Maybe they just do it to make us feel better. I'm okay with that. I like to feel better more than I like accuracy. But don't get around any engineers. They will lose their minds. Then they will take stuff apart especially lawn mowers and damage them and cause more problems for the tech to fix them. Like the two this month that took their Muffler off to fix what they thought was a fuel delivery issue. One even thought it was the carburetor!
I just know the mpg meter is quite accurate. The harder I drive and the more I idle, the lower it goes.