Hi, i have been learning a lot.... i think. the past few days from reading posts on this forum. I bought my first vehicle that is actually mine this weekend my parents have all oil changes done by the dealer but, i want to do it my self. I am trying to decide what oil to use on my new to me truck. Its a 2003 Ram 1500 4.7 V8 with 80k on it and has had conventional all its life. as far as i can tell it has no leaks. I want to use a synthetic probably M1 or Royal Purple i like changing oil i do it on my uncles cars often and would let these full synthetics only go about 8k i would use the filters that each company makes for that oil respectively. any advice is greatly appreciated, is it a bad idea to switch to one of these hi quality synthetics i have seen a lot of both sides on the forum i would rather not use a hi milage and also a recommendation on a good air filter would also be great. thanks I'm glad to be able to post.