i dunno i have a 95 s-10 (newer ones get better mileage) 4 cyl 5 speed and it got 32 on the way down to college, generally gets 27-29 mixed.
i do have some mods done to it but thier very basic, efan (biggest improvement)pullies (slightly smaller and aluminum crank pulley) ebay intake and blocked off the EGR valve (thing was broke/plugged and not spending $80 for a new useless part).
ive loaded the bed with 1000 lbs of gravel before and up to the top with topsoil, still drove ok and got the job done.
that and s-10's are everywhere and are reliable. parts are plentaful and cheap, comes in many different combinations (reg cab. ext cab. quad cab. shortbed longbed, feetside, flareside, 2wd, 4wd, non locking differential, locking differential. either a 2.2L 4 banger or a 4.3 V6)
the 98+ get better mileage because that year they had a head/intake change that improved mpg. 2000 and up can run E85 if thats any intrest.
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