What Is the Numbers and Letters in Motor Oils?

Taking the time to know more about what helps your vehicle and other motorized toys work provides you with the ability to be a better owner.  This in turn will provide you with the ability to better maintain your purchase and keeping it in working order for a longer period without issues.  Therefore, when I was provided the opportunity to write about the explanation of motor oils I was excited.  Without any further ado, I will provide you with the maybe surprising, but rather simplistic concept.

About fifty years or so ago oils were created that were multi-grade oils or oils that could be categorized in two grades known as viscosity.   Viscosity is simply the thickness and stickiness of the oil.  These two grades are taken into consideration under use for different times of year.  The first number is for the winter months, while the second number is for the summer seasons.  This is the reason that you will often see the letter W after the first number.  This is for winter, and not for weight opposed to popular belief.

The lower the number, the better ability it must function during the winter.  The second number is the viscosity of the oil when it is at 100 degrees Centigrade.  It is important that you follow the manual of your motor as to what viscosity your engine requires.  Another factor to ensure is that the oil you utilize fall under both specification requirements of the ACEA (Association des Constructeurs Europeens d’Automobiles) and the API (American Petroleum Institute).

There could be further discussion of what the difference between Synthetic blends and standard blends, but that subject has already been covered by Lustine Chrysler, Dodge, Jeep, & RAM in depth.  Visit their article on the benefits of Synthetics Oils to further your motor oil knowledge.


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