Go ahead and buy what they want you to buy.2yrs! Well if that's true then that's twice as long as with sta-bil
Q: How long will STA-BIL Fuel Stabilizer® keep fuel fresh?
A:STA-BIL® Fuel Stabilizer will keep fuel fresh for up to 12 months, guaranteed. Depending on the quality, type and source of the gasoline, as well as storage conditions, doubling the dosage rate of STA-BIL® brand could prolong this storage time to up to 2 years.