I am considering using this product for winter and summer use in my fuel tank.My dealer recommends this product. The problem seems to arise in many areas where more than 10% ethanol is added to the gas! Yamaha has done a lot of testing of the amount of ethanol in fuels purchased at gas stations and has found ( i am told ) that some stations were as high as 30% ethanol! This can cause major problems for vehicles not made to handle that concentration. Any body have experience with this product?