Warranty Oil Change Requirements

[Steveh27]

I bet this has been covered before, but I searched & didn't find a good opinion on my situation. I did post this at the end of an existing topic, but decided I might get an opinion with my own post.

I've got a question re; oil changes in my 2010 3dr auto. I bought it 6 months old with 4,600 miles on it. The dealer had changed the oil then. I had the second oil change done 7 months later with 3,500 more miles on it. The service guy said the oil looked brand new & almost kept it for his truck! lol. So now I'm approaching 6 months again, but only have 1,800 more miles on it. Sure seems like a waste to do it now, but I want to keep the warranty valid. This 18 month service (I have 9,800 miles on the car total now) would also be the time the manual says to inspect other items. A Toyota service manager said they don't worry about the time interval like they do the mileage. I know the manual says do it every 6 months no matter the mileage, but... I'm betting most would say do it every 6 months until out of warranty then do it every 5,000 miles which is about 11 months for me. The oil in it now is conventional Shell 5w-30. Opinions?