The difference between 10w-30 and 5w-30 oil is the thickness of the oil during cold weather conditions, 5w-30 being the thinner of the two and therefore recommended for colder operational climates. Engine oil is rated on a viscosity scale by the Society of Automotive Engineers, which determines its cold- and warm-weather rating; the cold rating is indicated by a “w” for winter.Know More
Automotive oil manufacturers currently produce multigrade oil, which means it behaves differently at different temperatures. The Society of Automotive Engineers grades oil based on its performance at different temperatures by measuring the amount of time it takes to flow through a length of tube. Oil that takes 30 seconds earns a grade of SAE 30. Lighter-weight oil passes more rapidly through the same tube but thickens under colder temperatures, allowing for better performance. Therefore, an SAE 10w-30 performs like grade-30 oil during warm temperatures and grade-10w oil in colder climates.
In the past, oil manufacturers only offered single-grade oil that needed to be changed for seasonal operations. Heavier oil that offered good performance in the summer would have to be changed for lighter-weight oil for easier starting in the winter. A single-grade oil has one number to signify its viscosity, such as SAE 50 or SAE 10w.Learn more about Engine Oil
The difference between 5w-20 and 5w-30 oil is that 5w-30 oil has a higher viscosity at its operating temperature. Viscosity is the term used to describe the thickness of a substance, in this case oil, where a higher number indicates a thicker oil.Full Answer >
The additives that manufacturers add to motor oil break down over time, making oil changes necessary, according to HowStuffWorks. The oil also picks up dirt and debris from the wear of the engine. While the filter removes foreign material for a while, if it gets plugged the oil bypasses it.Full Answer >
PAG oil is a synthetic compressor lubricant used by original equipment manufacturers in their R134a automotive air-conditioner systems. PAG oil stands for polyalkylene glycol oil.Full Answer >
Oil should be changed in the interval specified in the vehicle's owners manual. Among 2013 model vehicles, the oil change intervals can vary from every 7,500 miles in some cars to as high as 15,000 miles in others. These are high intervals are because of advancements in oil and vehicle technology.Full Answer >