Ive read some discussion about the distilled water in the mix evaporating off during the summer months... and only some distilled needing to be added to keep the mix at the proper ratio... assuming there are no leaks... any thoughts?
The concentrate was not on the shelf... I was just happy not to be reamed for $17 for the G05 or $20 for the Motorcraft.
All I'm doing is topping off the reservoir before winter... I'm a cheap bastard... the reason I change my own oil with the Motorcraft 5w-20 and filter for $21 from Walmart. And the reason I picked the Focus with a $3500 rebate over some of the other economy cars out there.
The Motorcraft gold coolant is designed to last 6 years or 105,000 miles until first flush, according to the owner's manual. Then, should be replaced every 3 yrs or 45,000 miles after first flush. Of course, use an equivalent brand to WSS-M97B51-A1, don't have to buy at dealer. But, I wouldn't use 'old green' fluid.
In hot climates, manual says not to let concentrate get more than 60% water, or corrosion damage may occur. Just passing info to the warm climate owners above.
its always better to use coolant more than water because the coolant has additives that help the water pump and such run better . first thing i learned when i went through auto classes at valvoline. they teach ya small stuff like that