5k OCIs.
2010 Hyundai 2.4L with 93.5k on the clock.
PYB 5w-30 (5w-20 on the fill cap, 5w-30 okay by book)
Over 90% highway, probably close to 95%.
No topping off during the 5k interval. Barely gets below the full mark at 5k.
Book - something like 7.5k normal service, but at 5k its easy for me to remember when to change and I think its good enough service. And seems at about 5k, the engine gets a little more noise, goes back (less noise) after a change. Could be just me but seems the same thing every time.
When I hit 100k on the clock, will probably continue doing the same (PYB & EOM filter), but have thoughts on occasion to try something else, dunno yet.