Oil Viscosity

The right oil can make a dramatic difference in engine and overall equipment performance. Temperature, load, conditions and engine type and age affects the life of an engine, as well affects what oil you use. Knowing the appropriate oil viscosity needed for your fleet or equipment all year round can help you:

  • Lengthen engine lifetime and service
  • Reduce wear and tear and boost durability
  • Increase efficiency
  • Protect equipment

Just like the best oil can make a difference in performance, the right relationship with an Atlanta-based fuel, oil and lubricant supplier can make a difference. Burkett Oil Company can help business owners keep their equipment protected and reaching max performance.

Follow the manufacturer’s guidelines and recommendations for the best oil for your conditions. Burkett Oil Company provides a full line of Chevron Delo engine oils for both on- and off-road applications and different vehicle type, load and operating conditions.

Read more about the line of Chevron Delo oils at Burkett Oil Company.


Oil Weights

Motor oils are graded by the Society of Automotive Engineers (SAE) based on their viscosity characteristics. The grades range from low viscosity to high viscosity and looks like the following: 0, 5, 10, 15, 20, 25, 30, 40, 50 or 60. The number 0, 5, 10, 15 and 25 are accompanied by the letter “W” which stands for “winter” (not “weight”) or cold-start viscosity, at lower temperatures. Beyond the viscosity grade, every bottle of motor oil displays two other pieces of valuable information. This includes the:

  • API service rating
  • ”Energy Conserving’ indicator

The API service rating is a two-lettered rating that shows the type of engine the oil is designed for (gas or diesel) along with the quality level. The viscosity grade (as shown above), will tell you the oil’s thickness, or viscosity. A low number indicates thin oil that flows easily. A higher number indicates a thicker oil and are more resistant to flow. Viscosity is determined by measuring the time it takes for a standard amount of oil to pass (or flow) through a standard orifice at standard temperatures.

Multi-weighted oils
When polymers are added to oil, it creates multi-weighted oils. This allows the oil to have different weights at varying temperatures. An oil with a grade of 10W-40 for instance tells you a couple of different things. The first number displays the viscosity of the oil at cold temperatures while the second number indicates the viscosity at warmer, or operating, temperatures. The polymers allow an oil to flow freely both in cooler temperatures and in operating temperatures.

The “W” on a viscosity rating simply means that the oil viscosity has been tested at a colder temperature. The goal is to maintain viscosity in varying temperatures. This helps eliminate any “cold starts” to a car in the winter. The quicker oil flows in cold temperature, the quicker an engine can operate at peak levels. When an engine is forced to “dry run” or “cold start” in can mean significant engine wear over time.

If you have a question for us about oils and lubricants, fuels, coolants or anything relating to the industry we serve, please contact us. Burkett Oil has become a trusted supplier of fuels and lubricants in the Atlanta area for nearly 40 years.