Ultra reliable, good mileage (steady at 21.4 on road trips), snappy acceleration... Best truck I've owned until I bought a 2000 Tundra SR5, then a 2006 4-door Limited Edition Tundra. The T-100 is still an awesome workhorse truck that never falters. I have changed only the oil, oil and air filters, battery, and tires. My neighbors with F-150s and silverado 1500s don't even come close to either the T-100 or the Tundras in reliable service and road clearance. Two Silverados (a 2005 and a 2006) busted their rear shock mounts trying to follow me off road on my Father-in-law's ranch in Caddo, Texas.
My T100 has the 3.4 liter engine. I regularly get 20 mpg, even loaded. The only fault with it is that I had to install an aftermarket tranny cooler as the oil overheated towing in the mountains. That solved 99% of my towing problem. Great truck otherwise. I have 225k miles on it, burns no oil, runs well.
I've had my TOYO 8 years now. It has 357,000 miles on it/ I have replaced the radiator, water pump, heater valve, shocks and a lower ball joint in all this time, most dependable mid sized truck ever built hands down! I train Strongman and had had literally a ton in the bed at a time and hauled a trailer and 3 atvs for 4 hrs to the mountains
How could I have ever know that when I drove off of the dealership lot 15 years ago that I would still be driving my T100 on a 120 mile daily round trip commute in 2010. Originally purchased to pull a boat and haul camping gear. 411,000 plus miles later, I would say that I got a great return on my investment. The only work performed on this truck besides normal maintenance happened after a deer hit the front end. So both headlight assemblies, radiator, and fan were replaced. That was 159,000 miles ago. Still on the original alternator, Water pump, PS pump and even transmission fluid! Has taken it's share of licks but never has stopped ticking.