24mpg at what speed in what conditions? Low speed in the plains states, the kind of speed that nobody actually drives at, I can believe that. We all know how aerodynamics work (I'm betting you drive a 2nd gen)...
We both know a stock 12v is grossly under-powered by early-mid 2000s standards.
And if you've got a close to stock (nobody gets 24mpg with 35s and a lift) 12v powered vehicle that isn't a completely clapped out POS or very, very rusty you're probably not wheeling it much if at all...
Was I close?