hi brooklyn, the viscosity of motor oil is how quickly it flows
Motor oil typically has greater viscosity than olive oil. Viscosity is a measure of a fluid's resistance to flow, and motor oil is designed to have a higher viscosity in order to protect the engine's moving parts at high temperatures and speeds.
Low viscosity oil flows easier when it is cold but become thinner when it is hot.
olive oil
decreased temperature
A motor oil with a high viscosity (resistance to flow) like SAE 50, will be your greatest density motor oil. Low viscosity like SAE 20 will have the least density.
I understand you can use the same oil viscosity in both motor & transmission on the 2008 harley roadking!
5w30
SAE 10W30
Not usually
motor oil. higher viscosity better for hot weather, lower for winter
The difference between 10W-40 motor oil and 80W gear oil is mainly in their application, viscosity rating system, and additives. Application 10W-40 motor oil is used in the engine. It lubricates engine parts, reduces heat, cleans internal components, and protects against wear. 80W gear oil is used in gearboxes, transmissions, and differentials. It lubricates gears that operate under heavy pressure. Viscosity Rating Although the numbers may look similar, they are measured on different viscosity scales: 10W-40: The “10W” refers to winter (cold temperature) performance, and “40” refers to viscosity at normal engine operating temperature. 80W: The “80W” refers to cold temperature performance for gear oil. Gear oil uses a different rating system, so 80W is not directly comparable to 10W. In fact, 80W gear oil is generally much thicker under operating conditions than 10W-40 motor oil. Additives Motor oil contains detergents and additives to deal with combustion by-products and keep the engine clean. Gear oil contains extreme-pressure (EP) additives to protect gears from heavy loads and metal-to-metal contact. Summary 10W-40 motor oil is designed for engines and focuses on cleaning, cooling, and lubrication at high temperatures. 80W gear oil is designed for transmissions and differentials and is thicker, with special additives to handle heavy gear pressure.
Of course you can but when you do you are changing the viscosity of the oil. Your engine requires a certain weight or viscosity of oil. Use only the weight oil recommended by the manufacture.