After using several of the products found in auto part stores with not much for results. I stumbled upon archoil products and read the reviews and decided to give it a try. WOW ! what a difference in throttle responce, in just a short amount of time. I knew it was carboned up from letting it idle in the morning to warm up, and driving carefully on snow and ice covered roads, you never get a chance to blow the cobwebs out of motor. Using AR6400G in my Raptor has brought back the performance I remember the first time i drove it! Don,t waste you money on the crap at gas stations, Walmart, auto part stores, if you want results, use ARCHOIL AR6400G it really works!!!!!!!