[oil pan 4]

I doubled the fuel mileage in my suburban with 7.4L engine by tuning the carb for lean burn cruse and doing EOC. It started out getting 6.6mpg, it was so horrible I only collected data for roughly two 50 mile fillups.
Just the lean burn increased economy about 50% or up to 10mpg.
I was told that double digit fuel economy with a 3 speed auto and big block would not happen, then when I started doing EOC it went up to 12 to 13 mpg.
I have not taken the suburban on any highway trips, the only highway trip data I have is filling up, driving to the next town over then back, about 50 miles and filling up again at the same gas pump pointed in the same direction. Highway fuel mileage is between 16 and 20 mpg with lean burn.

To move a much smaller electric truck like an S-10 or ranger at 50mph, best case scenario is 7,000 to 10,000 watts to maintain speed.
To move a large vehicle like that van, more like 20 kw.

As far as budget a half way decent 7 to 8 kw generator is going to cost almost $1,000.
A good generator intended to run at full load for many hours will cost at least double that and provide less power.

Lets put it this way, if I thought it could be done for $2,000 to $3,000 I would have already done it.