Matt has a good routine down. Changing at 5k intervals makes it easy to remember and it isn't to early or to long on the oil. Just right. Plus you can work your tire rotations in along with it and depending on how long the mileage takes you in time wise, you can work your vehicle inspections around it as well. Keeps everything organized.

AMSOIL has been out since 1972 and have been growing every year. They were the first to have an API certified synthetic engine oil, that is why you see "First In Synthetics" on their site.