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50 degrees at 69.172 miles = 3458.6 miles
Qoute from autoeducation.com Oil weight, or viscosity, refers to how thick or thin the oil is. The temperature requirements set for oil by the Society of Automotive Engineers (SAE) is 0 degrees F (low) and 210 degrees F (high). Oils meeting the SAE's low temperature requirements have a "W" after the viscosity rating (example: 10W), and oils that meet the high ratings have no letter (example SAE 30). An oil is rated for viscosity by heating it to a specified temperature, and then allowing it to flow out of a specifically sized hole. Its viscosity rating is determined by the length of time it takes to flow out of the hole. If it flows quickly, it gets a low rating. If it flows slowly, it gets a high rating.
It is kW/kY where k is any non-zero number.
Any time greater than 0 seconds. You have failed to specify the distance the motor is lifting the mass, along with any gearing ratios.
Calculate the amount of potential energy required. Then divide by the power.