LAT’s NITRO 50-HP & 70-HP blends are specifically formulated to withstand the extreme conditions found only in Nitro Methanol, and Top Fuel, Alcohol burning engines. NITRO HP offers high viscosity, zinc content, high film strength, and robust additive package. Developed for superior protection under heavy fuel dilution conditions and protects against piston scuffing and valve train wear Safety Data Sheet Appearance: Dark Amber Viscosity @ 100C: 39.50cSt Viscosity @ 40C: 385.60cSt Zinc wt: 2500ppm Viscosity Index: 131.00