What is a 'green' lubricant?

The question sounds simple enough, but as TLT contributing editor Dr. Neil Canter explains in his in-depth treatment on page 50, there is no universally accepted definition for the term. "While the question raised is a simple one," Dr. Canter notes, "the answer is much more complex and, indeed, has not even been clearly articulated." Asked to select from a list, the largest group of survey respondents (45%) said the best way to define a green lubricant is by its life cycle, particularly final disposition (see box). Some readers reject the green lubricant notion altogether. "It's a politically correct term that really has no significant meaning," said one respondent. Asked to offer their own definitions of a green lubricant, TLT readers submitted the following. For another perspective, check out Dr. Bob Gresham's "The Global Case for Green" article on page 18.

Green means the lubricant will not spoil the environment if it is spilled.

Somethinq that has significantly less impact on the environment because it is less toxic, offers energy savings, lasts longer, is made from recycled material, can be recycled easier and is more biodegradable.

There is no such thing.

A qreen lubricant provides environmental benefits over a traditional lubricant. The environmental benefits include biodegradability, use of renewable raw materials or decreased energy consumption when produced or used.

Green lubricants are biodegradable or non-toxic to the environment. Both bio-based and certain synthetic fluids fit this description. A lubricant need not be bio-based to be considered green.

Our company categorizes based on the application - is it on or near a waterway or water table? If the application is on land, we suggest a lubricant that is readily biodegradable by OECD 301 standards. If we are lubricating a steering system in a ferry boat (where a leak gets immediately into water) a lubricant considered for use must pass the EPAs 40CFR435 Static Sheen test and be aquatically friendly.

One that contains no carcinogens, can be recycled, decomposed to basic ingrethents or has after-life use.

A qreen lubricant would be any product that maximizes the use of renewable resources while maintaining proper operational life of the equipment.

Products derived from a renewable carbon source or a product that reduces greenhouse gas emissions.

Deqrades to somewhat harmless...