ChiefH

So far my 2015 Journey EVIC has indicated Oil Change at 3500 miles every time. I don't mean around 3500 miles, I mean EXACTLY 3500 miles. It seems that it always occurrs early on a trip, then annoys me every time I start the engine. I read that the PCM used a "magic" algorithm to calculate when oil should be changed. I don't believe it as no matter the type of driving I do, it still comes on at 3500 miles. So mechanic what is happening? (the Owner's manual indicates the interval could be as long as 8000 miles). My old '67 VW had 3000 mile changes with straight weight oil. Untfortunately the valve clearance had to be adjusted every other oil change (about 6000 miles) I would expect a modern engine to go 5000 miles before needing an oil change. BTW, on the last trip when it came on I decided to "reset" it and put in my log book the expected odometer reading for 5000 miles. I then changed the oil at 5001 miles, reset the oil change again. I think that 5000 miles is good enough and a good time for an oil change and tire rotation.