Tide won't work for me, I'm sensitive to something in it - even doing double rinse cycles I will get itchy hives.
I've gone through many trials, and found that FOCA from Sams doesn't bother me, so that's what we're using.
I tailor it with some other stuff as needed.
DH greasy work clothes - add Oxyclean and (most important) pre-soak for at least an hour.
Bleach for whites.
Mrs. Stewart's Bluing...omg, this stuff is cool, fairly benign, and cheap. Add to jeans every few months to refresh the color. Keeps DH looking spiffy at work, and helps stretch the clothes budget.
Add a tiny bit occasionally to whites when they get dingy, it really brightens them back up.
Bluing can also be used to brighten gray hair if its tending to yellow - but be careful, it only takes a teeny bit.