Going to change my oil for the first time coming up, got a 04 Lexus rx330 140k miles Been fed whatever cheap dino the quick lube places had at 3-5k miles. I plan on changing it myself. Gonna try to go full synthetic with Supertech and a Bosch premium filter. Will run it for about 5k miles then change again and run a 7k OCI after that. Does that sounds like a good plan?