OK, I have a JD L111 riding mower, a 4 stroke edger, and a 2 stroke weed eater. Everytime I take my 5 gal gas tank or 1 gal tank (2 cycle) to the station for fill-up I always wonder which is the best additive to put in. I have FP+, RLI FI cleaner, MMO, and Stabil on hand. I go through the 5 gal tank pretty quickly with the mower, but the edger might see 1 or 2 fills/year. The 1 gal tank for the eater lasts a year easily. My current plan/usage is FP+ in the 5 gal through the long cutting season, and then try to get some Stabil in there as the season winds down. I've just been using the 2 cycle oil mix with a little Stabil in the 1 gal can. Would the RLI cleaner or MMO be better choices than my current plan? I haven't really noticed anything unusual with what I'm doing. But then again, who says I know what I'm doing?