>>2663650I have two trucks.
On my Colorado (3.5 I5, 5 speed stick, 3.73 differential ratio, 29 inch tires)
I use 4 low so my truck can hold my boat on engine compression at the boat ramp, because my parking brake has been non-functional for a few years and I can't be assed to fix it. That's probably 30 times a year. I also use 4 low to haul fencing supplies around my pasture, because then I can idle in first at about walking pace and climb over the bumps, clumps, rocks, and stumps with 800 lbs of posts in the bed without bouncing it all over hell. That's a couple weekends each spring and each fall. I use 4 low when driving through deep snow so I can keep engine speed up in the RPM range where my throttle control to torque output is the most responsive and precise.
On my K5 (6.2L atmospheric V8 diesel, 4 speed manual, 4.10 differential ratio, 38 inch tires)
I use 4 low when skidding logs or pulling things out of the mud (10 times a year to 10 times a weekend, depending on the weather), I use 4 low when climbing rock ledges or very steep inclines, and I use 4 low when in sand or mud. I've been thinking about putting a doubler on and twinsticking (well, triple with the doubler), because this engine might sip fuel, but it's got fuck all for power. Might swap the diesel for a Big Block gasser instead. Doubler would be cheaper though.
I don't get people who think that big tires tear up trails bad. Overinflated tires tear up trails and people who spin tires tear up trails (UTVs, especially, do both of these things profligately with tires that would fit in the wheel wells of a Nissan Hardbody). Larger tires let you air down even softer and let you reduce how much you spin your wheels to accomplish a given task.
