Aspen 4 is an alkylate fuel for lawnmowers, rotary cultivators, snow blowers, boats and other 4-stroke engines. Aspen 4 keeps valves and pistons cleaner, which gives the engine a longer service life and greater operational reliability. Aspen 4 can be stored for a long time without any deterioration in quality. Aspen alkylate fuel keeps for 3-5 years compared with ordinary fuel, which keeps for around 3-5 months.