Because of winter here at 9000ft in the Rockies my Moggies are "off" the road for around 6 months every year, I use Stabil in full tanks which is readily available and cheap from Walmart have never had any issues.
Bruce 1964 4/4 Series V Comp (Megan) 1994 +8 (Maurice) tis no more 2013 M3W (Olga)