Pretty much what everyone here says. The interval is very important, especially depending on the usage of that interval. Remember that (1) hour of idling equals to 27. 5 miles driven. Miles driven in temps below 34°F and above 103°F are considered heavy use and require a shorter interval. Towing or pushing to the cars Rev limit also shortens interval. My 16’ tC is my first Toyota, however all my other cars I stared doing the BG crankcase cleaning every 10k or one year after 60k and seafoam additive every other oil change after 60k. Had one 92’ Accord go to almost 317k, a 2010’ F-150 V8 that got to 227k until it got hit by a Drunk driver in a chevy Dualie and my wife’s 03 Accord still alive and kickin at 281k. My 16’ tC has just over 91k.