Originally posted by gdub520:
...and why if this thing affects air intake it takes 2 or 3 tankfuls before u see any improved mileage...shouldn't it show up right away?
I think that the manufacturer is setting the requirement that you have to allow this period of time to allow it to adjust your computer... On the other hand, it buys them time so that the money-back gaurentee time is burned and you are left "screwed" out of your hard earned dollars. It is called a "Catch-22". Typical bait-and-switch marketing ploy. "Pretty Sneaky Sis"(ala Connect Four Commercial circa 1980)!!!