i'm making a test right now, I filled my tank with the tod turned off, and i ran 340 Miles per tank. now i'm almost done running with tod turned on and i have a 1/4 tank left, and by far, i think i may gain more, but at this point its a maybe, or come real close, but when i run out of gas, I will post how many miles i did, and if i gained any or lost any. the frist and this second test, have been done with the same conditions, so we will see what happends. and u guys will have your answers, .