I have an '05 durango 4.7L that consumes no oil that I can notice. I am relatively new here and was changing the dino every 3 to 4K miles (ok you can stop laughing) I have done that on my accord and just passed 320K miles---anyway. after I finish the ARX on the durango, would it be worth it to switch to synthetic and run higher OCI's? I would like the convenience of the higher OCI's but also want the most wear protection---yes I am still getting over the 3K OCI. Also, the cost of doing a couple oil changes vs. 4 or 5 would be nice....but I do my own oil changes so with dino and aa good filter was only about 22 bucks. your thoughts....thanks