Includes auto stop Fill Partner and Next day Postage if ordered before 2pm 5 litre Aspen 2 pre-mixed 2-stroke alkylate petrol (50:1) Aspen 2 is a pe-mixed (at 50:1) alkylate petrol suitable for all air cooled 2-stroke engines, no matter what fuel oil mix. It is mixed with a synthetic high quality high performance 2-stroke oil for maximum protection and low smoke. This 2-stroke ready-mixed alkylate petrol contains virtually no sulphur, benzene or aromatics. It is therefore much better from a health aspect to use than regular petrol - in fact normal petrol contains so much benzene and aromatics (solvents) that it poses a real health risk to use in 2-stroke engines. Aspen 2 is also chemically inert so you can comfortably leave the fuel in the machine and it will not gum-up, it will also store for years, where normal petrol start to go off after 30 days. If you care about your health, your environment and your machinery - Aspen alkylate petrol is your only choice