used 2 3/4 cans total over 1000 miles,,,2/3 can drove about 3-400 miles changed oil filter another 2/3 can about 4-500 miles then again i say 2/3 can because i was spraying thru the intake hose behind the MAF meter,,it never threw a code and that really surprises me. Drone about 100 miles then changed oil . Have put 8-850 on it and the bottom end torque is Better,,i check my milage constantly (not the dash) im up 1.2 mpg after,,,,i dash reads im get 2.3 mpg better than i really DO,, dont notice much difference above 3500rpm but idle up to there is better.. So my new plan is spray about 1/2 can the week before i change oil.