Yes truck, 25 gallon tank, 20 mpg if I keep it down around 65/70 but drops much faster over 100, over 150 you can almost see the needle move.
Oh that was another thing the Tesla forum brought up. Like you said the charge procedure is controlled by the onboard system, so a long 120 volt charge uses a larger percentage of the power coming in the make it come in. I doubt it's a significant number, they were probably nit picking, but it's part of the equation.
Since the replacement battery cost will likely increase with inflation like everything else, when you know you're getting close it might be better to do it sooner than you have to in order to come out ahead.
The problem with this stuff is there's no crusty old fart whos been there, done that, got the t-shirt, to ask, but I suppose our AI Robot overlords will tell us what to do.