So you wouldn't recommend the 5w30 that GM is putting in these cars? And is the filter from Toyota any different than the one GM sells?

Ive been searching all the forums trying to find what brand and weight of oil people are using. I am doing my first oil change on my wife's vibe and am getting conflicting info from gm and toyota. Gm uses a semi-synthetic 5w30 while toyota is using some 0w20. First of all I have never used anything ...