GotQuestions? Lubricants

Q. How can a lower viscosity oil still protect my engine?

Isn't thicker better when it comes to long engine life?

April 10, 2013

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A. Lower viscosity oils or oils with a lower W rating such as 10W-30, 5W-40 or 5W-30 can be formulated for both engine durability and fuel economy.

When a low viscosity oil can demonstrate proven engine durability, the benefits of significant fuel savings while sustaining optimum engine life is achievable. However, emphasis needs to be placed on how the oil is formulated and tested. Just lowering the viscosity grade without providing a performance enhancing additive technology could lead to higher engine wear and shortened engine life.


With the push to improve fuel economy, the unknowing consumer may be inclined just to listen to the fuel-saving message and not check out product performance support behind the claims.

Overall, properly designed, low viscosity heavy-duty engine oils can provide fuel savings, reduce cold engine cranking with reduced dependency on energy consuming block heaters, and improved battery and starter life, reduce cold weather start wear and superior high temperature performance.


  1. 1. willie essary [ May 02, 2013 @ 07:38AM ]

    does royal purple meet these standards purtection.

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Author Bio

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Mark Betner

Heavy Duty Lubricants Manager

CITGO Lubricants

Mark Betner boasts 35 years of experience in the lubricants business. As the Heavy Duty Product Manager for CITGO Lubricants he is responsible for initiating and implementing the marketing of new products and human development programs and oversees communications with the media, trade shows and consumer education.

Prior to this, he was a field sales manager and technical training administrator at an independent lubricant company specializing in heavy equipment lubrication.

Mark earned a master’s and bachelor’s degree in both chemistry and biology from Indiana University. He holds a certification from the Society of Tribologists and Lubrication Engineers and is a member of the Truck Maintenance Council.


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