We have purchased a couple of new cars the past few years, a 2011 Chevrolet C1500 Silverado (Flex-Fuel) and a 2013 Chevrolet Malabu (Eco). All of my previous vehicles since 1995 have had the Berryman B-12 added to every 2-3 gas tanks and they ran PERFECTLY at 150,000 miles just as they did at 1,500 miles. I feel adding the B-12 helped contribute to the life of the engine and fuel system and have been a strong believer in the product. The owner's manual for both of our new vehicles State the Following: Notice: This vehicle was not designed for fuel that contains methanol. Do not use fuel containing methanol. It can corrode metal parts in the fuel system and also damage plastic and rubber parts. That damage would not be covered under the vehicle warranty. My question is....The manual says NOT TO USE fuel that contains METHANOL and the Berryman B-12 contains 20%-30% Methanol. Can the Berryman B-12 be used in these new vehicles to improve performance without causing the issues listed in the Notice above from the owner's manual that could potentially not be covered under the Manufactures Warranty? Sincerely, A Loyal Customer....