P21S W Washer Booster

[BigLeegr]

Has anyone tried this stuff? How much would you add to a typical washer tank?
Has anyone tried both this and 303's booster? Which is "better?" Why?

[Bob]

The P21S you are supposed to add the pre measured amount, it measures it for you, to a gallon of windshield washer fluid and then poor it in.

[BigLeegr]

So, how much is the "pre measured amount?" (Was wondering about cost comparison per use vs. the 303 tablets.)

[Bob]

So, how much is the "pre measured amount?" (Was wondering about cost comparison per use vs. the 303 tablets.)
It doesn't say the amount but a full bottle will treat 40 quarts (10 gallons).

[BigLeegr]

So, since it's a 250 ml bottle, 1 measurement to a gallon, makes 10 gallons, it uses 25 ml per time. About 80¢ per use at the time of posting price. So it's about half the 303 cost.

Now all I need to find out is if it's an improvement over 303! :P