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Originally Posted by urban_legend
Since porsche says it is lifetime - I could not find how much coolant that I would need in the service manual. How much coolant do I need to buy?
Also I thought the whole point of colored coolant was to provide a way for the folks who don't read labels or instructions to have a fair shot at getting it right.
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You'll need 2-3 gal. of coolant and 2-3 gal of distilled water. Mix 50/50 and any unused can be saved indefinitely (in a sealed container) for top-ups.
You should also have another 3-4 gal. of distilled water to flush the system. Drain it, add the distilled water, run the car for a few minutes (driving it is best, maybe 5-10 mi.), then drain the water and refill with the 50/50 mix. Bleed and top off as necessary.
Despite what many think, there is no color standard in the Industry. Mfgrs. are able to add any dye they want to their coolant, so you cannot go by color alone. Also, just because a coolant says it's compatible doesn't mean that it is.
