Volume 1 Issue 1 - Lubrication

Intro to Lubrication

Why have a section about lubrication in a magazine about GM Diesels?

Simply stated, there is a direct connection between lubrication and the health and life of your vehicles. GM has done its part by manufacturing these marvelous machines; each owner is solely responsible for their maintenance. As a Certified Lubrication Specialist (CLS), certified by the Society of Tribologist and Lubrication Engineers (STLE), I cringe at the misleading advertising, misinformation and lack of lubrication education for both consumers and service professionals. In this continuing series, Lube Notes, I seek to provide factual information on lubrication to allow readers to rise above all the advertising hype and half-truths in order to make informed decisions when selecting lubricants – engine oil, transmission fluid, gear lube – for their vehicles. With this goal in mind, I intend to educate, not indoctrinate. In fact, the information in these columns will equip you to see through the attempts at indoctrination that surround us.

I want to begin with some fundamentals of lubrication and, in subsequent editions of maxxTORQUE, progress through lubricant formulation and applications.

So come along for the ride and be sure to jot down questions as you read. You will always find my email address at the end of the article, and I will be glad to answer your questions. Also, I will select some of the questions to publish in the next issue of maxxTORQUE.

Fundamentals of Lubrication

When two surfaces slide or roll in contact with each other, friction is the force that resists that motion. It is important to remember that motion is required in order for friction to occur. There are several factors that affect the level of friction between the moving surfaces. I list these in no specific order or level of magnitude.

• Surface finish: relative smoothness or roughness
• Type of motion: rolling versus sliding
• Load: amount of pressure pushing the surfaces together
• Speed: rate of relative motion
• Lubricant: base fluid, viscosity and additives
• Temperature (affects the condition of the surfaces and the viscosity of the lubricating film)