Most of my driving is local, short trips, etc. I change at 6-month intervals ... I like to say 5,000 miles or 6-months, but I don't reach 5,000 miles in that time frame. When sweetie was alive, we visited her family frequently, and there were a lot of 50 mile trips thrown into the mix.
Now, when driving around town, I keep the car in 3rd or 4th gear, hoping to put a little more heat into the oil, and the engine feels a little happier at 2,000 rpm in 3rd rather than at 1,400 rpm in top gear.
Even though I use an oil rated for higher mileage (M1 EP) I don't feel right about abusing it by driving an entire year in a severe servce situation. However, I'm in the process of transitioning to HPL, and when the switch is completed, I'll feel better about going a full year.
What I'm doing might be considered overkill by many - short OCIs with spendy oil in a lowly 4-cylinder Camry - and I agree, but it allows me to feel good to be doing something that may help prolong the life of the engine. When you get right down to it, unless a part breaks or wears out, the car requires nothing, and has required almost nothing, in the way of maintenance other than fluid changes and a set of plugs at 90,000 miles, so why not pamper it, and myself, with a bit of excess.