The main difference between 10W-30 and 10W-40 motor oil is that 10W-40 has a higher viscosity, which means that it will remain thicker at higher temperatures than 10W-30. Viscosity means a liquid's resistance to flow, and normally a higher viscosity is a good thing for oil, as it acts as a better lubricant and creates a stronger seal.Know More
The viscosity of an engine oil is measured at two different temperatures: zero degrees Fahrenheit and 212 F. The first viscosity reading at zero is represented by the number in front of the W, meaning that both 10W-30 and 10W-40 oil have the same viscosity when cold. The number after the W indicates the viscosity at 212 F, with the number being higher the more viscous the oil is at high temperatures.
While both 10W-30 and 10W-40 are perfectly suited for use in warm environments, many experts recommend switching to a 5W-30 during the winter. This is because it will be slightly thinner at cold temperatures, which allows it to flow more easily through the engine. If the oil is too thick, it can make it difficult for the engine to start and run. This is turn can cause lowered fuel economy and can possibly damage the engine over time.Learn More
Although it is best to use the oil viscosity recommended by the manufacturer of a given vehicle, it is sometimes acceptable to substitute 5w30 oil for 5w20. This might result in a drop in fuel economy, especially during the winter months.Full Answer >
Vintage Petroleum Inc. was an oil company based in the United States. It was acquired by Occidental Petroleum Corp., better known as Oxy, in 2005 and is now a subsidiary of that company.Full Answer >
To remove engine oil sludge, use an approved sludge-removing additive, such as a synthetic oil with sludge remover or a flushing oil concentrate. Applying these additives and correctly flushing the engine effectively removes engine oil sludge.Full Answer >
If a vehicle's oil is not changed as required, the filter stops working and dirt accumulates in the engine making the oil lose its lubricating qualities. As a result, the metals in the vehicle come into contact, making them wear.Full Answer >