When I 1st got my 16,the 1st two changes were done in less that 4000 mi....Just wanted any break in gunk outta it..Now with synthetic an all ill go till dash sez to go or longer..Biggest problem with oil is that it gets overcome with unburnt fuel which over time does more harm that you think....Its all the start n stop by goin to the corner store or coffee n such and long warm ups which don't do any help..As for the quick sprints to the corner store,i go the long way to make sure engine gets a good warm up,as for the warm up time well in the summer its about 30 or so seconds and winter its a cpl min....Then I just baby it till temps are at proper running temps and then its game on..
If you did oil sampleing,thats when you realize how much your saveing or wasteing but how many sample their oil..
