Oil sludging atonement: Toyota settles class-action suit

If you're the owner of certain Toyota products built with the 2.2L I4 or 3.0L V6 between 1997 and 2002, you may soon be receiving notification from the automaker concerning its recent settlement in a class-action lawsuit. Filed as the result of damage caused by sludged oil (which ultimately can destroy an engine by clogging lubrication passages), the suit claimed that affected customers suffered from failures despite following Toyota's maintenance recommendations. As a result, Toyota will be extending the warranty of up to 7.5 million vehicles to 8 years and 120 days from the original purchase date (without regard for mileage), and will pay for damage incurred as a result of oil sludge - also referred to as oil gel.

In 2002, Toyota offered an extended warranty to some owners who were affected by the sludging problem, but many customers claim to have been accused of improper maintenance and were forced to pay for their own repairs.

Sludging is the result of several factors, some of which included longer drain intervals, tighter engine tolerances, and the typically higher operating temperatures of new engines. Several other manufacturers have also faced allegations of oil sludging problems and have responded in a variety of ways.

As a consumer, the best defensive measure is, of course, a regular oil change (following the "severe service" schedule if required) with a name-brand oil that meets the manufacturer's recommendations for viscosity and API service rating. Some manufacturers recommend different viscosities for operation in extremely hot or cold climates; as always, the owner's manual is an outstanding source of information on matters like these.

[Source: Consumer Affairs; a hat tip to AB readers Drew and Ryan]

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