I recently bought a couple quarts of Truefuel50 to try in my Kawasaki string trimmer and edger. Interesting stuff, a bit on the pricey side, but Lowes and Home Depot in my area have been selling it for less than $5/quart. I dumped my previous mixture of 87 pump gas with Mobil One Racing 2T at 32:1 into one of my quads and poured in Truefuel50. 50:1 is the recommended mix ratio for my equipment. I noticed that the engines seemed to run a little bit rougher and didn't have that snappy acceleration I was used to with the mix I was using. I like the pre mixed form this stuff comes in and the absence of ethanol, but I wonder if I should try the Truefuel40 even though Kawasaki recommends 50:1?