7moon12

i wanted to change the fuel filter, but i read here somewhere that our car's filter is part of the fuel pump. that's one less thing to worry about. as for the motor oil, i guess i've been messing up because i've been using castrol gtx motor oil/fram extra guard for the filter(not a good combo from what i've been reading hear)every 3xxx miles. so, my questions are...
1...i keep reading here that mobil 1 motor oil/filters are the way to go...is that mobil 1 synthetic that i keep reading about on these posts ?

2...should i be changing any other oils(tranny/diff, etc.). if so, what brands and oil weights should i be using ?

thanks in advance guys for the always useful info !!!