Originally Posted By: CT8
Only you can decide if you are wasting your money. You can do a uoa to prove whether the oil change light or the 5,000 mile interval are the beast for you.
Exactly. A UOA will tell you if you are getting full usage out of the oil, or wasting it by dumping early.
Your Oil Change Light should be correct but without doing a UOA you can't be certain. You're using conventional oil, which in general is good for at least 5000 miles and can be used further. Next time you change it, send in a sample to see how it's doing.