Gumout Octane Booster, 10 oz Bottle (Pack of 6)

This is the best stuff I have found to make a noticeable difference in the way your car runs. I have used in everything from a turbocharged MB E550, to a Firebird Trans Am, to a Subaru and a Nissan. You will instantly hear your engine running smoother, and at a far better price than other products made by STP for instance. I drive V8’s because I have always regretted when I didn’t at some point, and this counteracts bad gas mileage whether you are burning regular, or the premium grades. What that means for me is when I drive the speed limit, or near it, I’m making up to 6 mpg better than when I don’t use this. Even if I drive more aggressively I get about 2 mpg more. I used to make a separate trip to Walmart just to get this product, but now get it at my front door thanks to Amazon stocking it. It’s cheaper to buy them six at a time this way anyway.