Viscosity is a fluid’s resistance to flow, in this case engine oil, and is represented by a number. The first number is followed by a w for winter, indicating that the oil has “x” viscosity at 0 degrees Fahrenheit. The second number that follows the dash is the oil’s viscosity at 212 degrees Fahrenheit.
For an example we will use 5W-30 engine oil. The 5 represents a 5 viscosity at 0 degrees Fahrenheit, and the 30 represents a 30 viscosity at 212 degrees Fahrenheit.
Synthetic oil is comprised of chemical compounds that are artificially made versus conventional engine oil, which is derived from petroleum. Synthetic oil is more expensive but has a lot of mentionable benefits.
- Improved fuel economy – from 1.8% up to 5% has been noted
- Decreased evaporative loss
- Better resistance to oil sludge issues
- Extended drain intervals
- Better lubrication during cold weather starting
Oil Change Intervals
We recommend that you follow the oil change intervals that are specified by the manufacturer in your vehicle owner’s manual. Oil change intervals can vary from 3,000 miles to as much as 10,000 miles in some cases.