I have a 2000 4runner with 125k. Trying to do my first oil change on it. Can anyone give step by step on how to do it? also all the parts that i will need to do the oil change and what oil is recommended? ive been using regular conventional oil but been told to switch to full synthetic cause of high miles and stop n' go driving conditions. co-worker told me to get castrol edge w/ syntec and said once i switch oil can go 15-20k before another oil change. give me some input and directions. thanks!