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I would like to flush the coolant on my sons 2015 Mazda 3 gx car as well as change the manual transmission fluid. The car was made in Mexico and has the 2.0l skyactive.
1. His car takes fl22 coolant. I would like to flush everything out with distilled water but I'm not sure how I would get the proper ratio of coolant afterwards since the collant is premixed.
2. Anyone know what fluid I need for the manual transmission?
Thanks in advance.
 

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My recommendation for the coolant flush would be to simply drain the radiator and refill it, the majority of the coolant will be in the radiator anyways and that way you won't have to worry about your water:coolant ratio. And as for the manual transmission gear oil, it's 1.8 qts of 75w-80 gear oil.
 
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