I just purchased AMSOIL gearlube for my 2003 Dodge Ram 1500 and paid the $10 for the preferred membership because it was only an extra $3 with the savings. My question is on the oil. I have been a diehard 3,000 mile oil changer. The last oil change I did I used Mobil 1 and a 5,000 OCI after all the reading on this board. I am at about 4,200 miles and its killing me to not change it. I dont mind changing my oil, however I would like to have the extra protection and the longer drains help offset the cost. I live in Florida and it gets pretty hot! My vehicles are the 2003 Ram 4.7 V8 and a 2001 Pontiac Grand Prix with the 3800 V6. If I used the AMSOIL how long should I go between changes. The website says 25,000 but that seems pretty long. What can I expect in real world driving. Sorry this is so long and thanks for any help.