1L Outboard 4T 10W-30 Motor Oil Motorboat Outboard 4 Stroke NMMA FC-W FC-W Diesel Xtreme INBOARD 4T 10W-40 is a high performance, multi-grade synthetic lubricant designed for use in 4-stroke diesel and gasoline inboard engines. Excellent low temperature properties for quick lubrication during cold starts. After use, this oil belongs in a waste oil collection point! Improper disposal of used oil endangers the environment! Any addition of foreign substances such as solvents, gasoline, brake and coolant fluids is prohibited. Used oil must be disposed of properly; packaging does not belong in household waste. Used oil can be returned to us depending on the quantity purchased (Flex-Autoteile, Elsterweg 8, 03130 Spremberg). The same applies for oil filters and oil-containing waste that regularly.