Back in the early 80s I had a Chevy Luv Diesel that got about 45 miles a gallon.
It was a great little truck until the transmission went out a couple of weeks after the warranty expired and they wanted about a thousand dollars less than I paid for the whole vehicle new to replace it.
I kinda wish I had kept it until I could have found a good used transmission.
I knew a girl who had a rabbit diesel pickup, she loved it.
Those little Japanese trucks were bare-bones death traps that you couldn’t sell legally today. We have the new Ford Maverick pickup which has a 40+ mpg hybrid version- and it is basically sold out for this model year.