This is our 2007 FJ Cruiser.Approximatley 3500 miles on QSGB 5w-30. 213,8xx miles on engine. I generally change the oil around 4000-4500 miles. Toyota says 5000 but it does lots of dirt roads and idling with the ac on.
Both vehicles plug up pretty fast. Never more than 10k.
A few years ago I kinda forgot about the jeeps filter. I was on the fwy climbing a grade and something was wrong! Couldn't maintain the speed limit the air filter was that dirty
No dipstick.... late model Merc & Beemer, plus a Triumph motorcycle. Can only get a read on the indicator after the engine/oil is warm. Not a great idea given you have to run the engine with possible adverse consequences if you measured incorrectly.