"I am a Mercedes Benz Master Guild Mechanic with 20 yrs. experience. I have been very displeased,as have been my customers, with the effects of ethanol on an engines performance and fuel mileage. One of my own vehicles, an Audi A6 Allroad has a 5 valve per cylinder 2.7l twin turbo engine which has never performed to my expectations regardless of how well it was "tuned". I generally don't buy into "miracle claims" of performance improvers. At best a good fuel system/injector cleaner is all I use and recommend. After reading these reviews I thought I might try Startron in my Johnson outboard which had some old fuel in the tank .On my way home I was fueling up the Audi, and I put Startron in it to see what, if any improvement there might be. This stuff is incredible, the car idles better, and has performance as though I increased the turbo boost...a lot. It pulls harder than it ever did in previous 70K miles . The engine runs smooth, more powerfully and I think it's getting better fuel economy, (hard to tell, my foots always in it because it's so much fun to drive now ! ) It's clear that this product does what it claims regarding performance, and I suspect it will help with water contamination issues as well. (but realize folks that if you have a fuel tank half full of water you probably need to drain it). I've told my Mechanic Buddies about this stuff and now they are using it as well. I haven't got around to putting it in the outboard because I used up the bottle on customers and my cars, but I will get more and try it in the boat, where I expect it will do great there also."

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