 you say you put it in every tank do you do it every or do you because i i try and do the ballpark thing where i'm like well i did it last time and then i went to half a tank and then i filled it so now if i go to like half a tank i can put it in most of the time i'm filling up my diesel at about a quarter tank somewhere around there quarter tank sometimes less because i my gauge actually i still actually have six gallons left when it says empty so when it hits around a quarter