Originally Posted by
ala_xfire
The concentrate Zerex G05 gallon + 1 gallon of distilled water costs almost the same as the one gallon 50/50 and you have twice as much.
On Amazon, 1 gallon of concentrate is $16.99 and 2 gallons of premix is $22.26. I am sure that 1 gallon of distilled water can be had for a lot less than $5.27. Remember to dispose of the old fluid properly as this stuff is not eco friendly, and painfully kills animals who are drawn to the taste of it.
I think that I purchased 2 gallons of each when I did my system.
There is a How To on the method to do the job by James1549
(CLICK HERE), I never bothered to change the thermostat but on a higher mleage car it might be worthwhile though.