1,Suggest the mixture of fuel than 20 :1 to 15:1 2,Horizontal bar cold wind 3,direct from factory chain saw in best price directly from factory chain saw in best price1 > 30 °C below zero when using the points for attention of fire-fighting2 > A mixture of fuel, advice than 2 to 1 for then to (must use high quality air cooled type two-stroke engine oil mixed)3 > saw chain lubrication oil to be 10 ...