[Cliff8928]

I believe the official Texaco statement was that if you mix the green with the orange, you just shorten the lifespan to that of the green. The orange is just a silicate-free formula. You do want to make sure that you keep it up to the full line or the dye can precipitate out of the antifreeze and that's what causes those greasy formations people complain about (that's what texaco said).