Recommended Oil Viscosity Grades John Deere prefers that 10W-30 be used in all its gasoline-powered engines, including those on riding mowers. The “W” indicates that the oil was tested at low air temperatures. A 10W-30 weight engine oil is viscous even at temperatures as low as negative 4 degrees Fahrenheit.Click to see full answer. Beside this, what oil do I put in my riding lawn mower?SAE 30 motor oil is commonly recommended for use in a lawn mower engine, but the safest best is to use the type of oil your lawn mower manufacturer recommends. Often 10W-30 or 10W-40, the same motor oil types that are used in vehicles, can also be used in a lawn mower.One may also ask, how much oil do I put in my John Deere lawn mower? The John Deere 102 mower has a recommended oil capacity of 1.5 quarts. The manufacturer also recommends the use of SAE oil such as 5W-30, 10W-30 or 15W-40, based on air temperature where you will be using the mower. Beside above, can I use synthetic oil in my John Deere mower? Yes! We have modified our engine oil recommendations to state that you may now use a synthetic 5W30 (100074WEB) or 10W30 oil in all temperature ranges. We recommend the use of Briggs & Stratton Synthetic Oil.What kind of oil does a John Deere e140 take?John Deere 32 oz. 10 W-30 Motor Oil is a 4-cycle, multi-viscosity oil engineered to stand up to high ambient temperatures. The oil is safety-tested and durable to ensure your tractor’s engine stays well-lubricated.