Coolant flush interval

[Tom M]

I have a '20 Eco-boost. The owner's manual says to flush the coolant at 100,000 miles (no time specification). On every car I've ever owned, I've changed the coolant every 3 years, regardless of mileage. I bought the car used last July, and it's now 5 years old. Would I be wasting money by having the coolant flushed now? The car has 13K miles on it.

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[robvas]

Take a good look at the coolant and it's condition. Today's coolant lasts soooo much longer than it did in the old days.

 

[Garfy]

I have a '20 Eco-boost. The owner's manual says to flush the coolant at 100,000 miles (no time specification). On every car I've ever owned, I've changed the coolant every 3 years, regardless of mileage. I bought the car used last July, and it's now 5 years old. Would I be wasting money by having the coolant flushed now? The car has 13K miles on it.

You can also use coolant test strips that shows a number of different parameters (amount of protection, anti-corrosion content, etc.)

 

[Skye]

The current printing of the manual shows the initial change should be 200,000 mi / 320,000 km or ten years, whichever occurs first.

I'd check the condition of the coolant. If it tests good, leave as-is.

https://www.ford.com/support/owner-...t-yuPCtl2BgW_jamGJqOZ1Je61Lq37FGIzbnGfH7U2D4x

https://www.ford.com/support/owner-...t-yuPCtl2BgW_jamGJqOZ1Je61Lq37FGIzbnGfH7U2D4x

 

[Tom M]

I know I'm living in the past, but 200K miles between coolant flushes boggles my mind.

 

[Zrussian13]

Whats it worth to you? Flushing the coolant costs next to nothing. My mustsng has been flushed several times but only because I had to do work on it. My 2005 f150 might still have the original coolant in it. I haven't flushed it in almost 15 years of ownership. Doesn't overheat and doesn't get driven much so I've never worried about it.

 

[wingnutt]

I do it every 50k, 1-200 is a tad much for even me

 

[Tom M]

I do it every 50k, 1-200 is a tad much for even me

That seems more prudent, even if not strictly necessary.

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