I have a question. Those of you who are running 20K oil change intervals on quality synthetic, are you putting on that many miles in a year or does it take longer?
Never used the Amsoil but have noticed products like Mobil 1 "Extended Performance" and "Annual Protection" advertise that they are good for 15 or 25K miles or up to one year. What if you only drive 6 or 7k a year on a vehicle? Technically, you are supposed to dump it but I don't really see why, especially if you get the vehicle out on the road occasionally and get everything heated up.
I know the only real way to answer this is to have a lab analyze the oil but just wondering if anyone had any opinions.
Last edited by RJY66; 01/24/18.
