3z
5 gallons
It depends on the brand and concentration of the powder mix. I would add it to taste.
46.875 Gallons
480 miles @ 20 miles per gallon = 24 gallons needed 24 gallons @ $3.75 per gallon = $90
21.62 a gallon. Regardless of how much you buy or how far you dillute the product; it still costs 21.62 a gallon. This is the answer I believe you are seeking. There are 128 ounces in a gallon. You want four ounces in each of 256 gallons. You will need 1024 ounces of additive for the 256 gallons. 1024 ounces of additive needed divided by 128 ounces per gallon equals 8 gallons of additive needed. Eight gallons times $21.62 a gallon will cost $172.96.
21 gallons
1158/20 = 57.9 gallons
If you get 25 miles per gallon you will use 72 gallons.
468 miles at 12 miles to the gallon = 468/12 = 39 gallons. 12 mpg!
4.75 gal 1 gallon = 4 quarts 1 quart = 0.25 gallon
Basic mental arithmetic !... 52.85 gallons.
You need 699/30 = 23.3 gallons.