GASGAS Pro Technical bulletin July 22nd 2013Application: 2002~2014 GASGAS “Pro” model motorcycles. Transmission oil:Recommend type: ATF DEXRON IIIAlternatives: NOTE: GASGAS Spain recommends only Dexron III automatic transmission oil at this time.Oil type warning:DO NOT USE #12378508 GM auto-trac II (blue) oilNever use synthetic oil in the transmission~clutch. The synthetic oils are “stickier” and this adhesion tendency, when applied to the areas between the clutch plates contribute to excessive clutch drag. Some brands of synthetic oil will chemically react when mixed with water, (from creeks, rain, or waterpump seal leakage). This reaction alters the pH factor of the oil. This acidic condition accelerates corrosion of steel engine parts, and loosens the bond of the clutch fiber plate material. Please do not second-guess this information. We have twelve years of experience with the Herbringer/Adige brand clutch plate materials, and we are in direct contact with the technical department at GASGAS Spain.