Greetings, so i have run a Fram Ultra for 2 OCI's with Valvoline Max Life High Milage. I changed the oil at 6 months with only 2,500 miles on it, twice. I got some Quaker State 5 30 High Milage to put in but wondering if I can extend my Fram Ultra one more cycle? My car is a 2005 Toyota Corolla with 90,000 miles on it. I try to take care of it the best I can on a tight budget. The car runs great and I suspect rust is what will eventually kill the car as I live in the Midwest. I due to a lot of city driving. Thanks for any respones