It may not be 25, but the little bit of info I can compile is indicating it's somewhere around there. It's also a fresh rebuild, (less than 3000 miles on it right now) so maybe that'll give it better mileage than most of the other 96's out there. When you were getting 18 in that 94, was that when it was new, or was it already nice and worn in?
New engines tend to get worse mileage, being "tight".
That '94 was pretty consistent all the way to 225k when I traded it for a Tundra.