How many of you YNABers still change your oil every 3,000 miles? My first recommendation is to follow the manufactures recommended schedule while under warranty. After that, you should easily be able to go 5,000 on any name brand conventional oil without issues. If you want to learn more about motor oil, the Bob Is The Oil Guy forum is the place to do it. I personally run my 2004 Sequoia 10,000 miles on my oil of choice and have paid to have the oil tested to verify the results. This won't work for everyone, but 5,000 miles should work for just about anyone.