[tonycarreon]

personally i wouldn't just start using the pre-mixed coolant (or any other off the shelf stuff) without doing a flush. too much can go wrong. i know i've got the porsche coolant in there, and that's what i'll keep using.

that said, there are a few people on the forum that have used it without problem.

if you're just a little low, add some distilled water instead of topping up with stuff from the store.