CarlGlas
Gold Member
Here's an interesting article that might shed a little light about
oil, its viscosity, and its connection to catalytic converters.
The article starts about mid way down on page 2.
THE CATALYST AND OIL CONNECTION
Kevin S. McCartney
Automotive Support Services
Training, Consulting, Product Development
Catalytic converters provide a huge emission reduction on most automobiles. Many Original Equipment Manufacturers (OEM) depend on catalysts to clean up 99% of exhaust emissions.
<snip>
Many technicians select viscosity based on old habits instead of manufacturer recommendations. The result is that many cars receive engine oil that unnecessarily increases damage to the
catalytic converter and the engine itself. This is especially true in warmer climates. Technicians often assume that thicker oil is required in warmer climates. They often end up with oil that
is thicker but lower quality. IE: replacing a 5W-20 oil with a similarly priced 5W-30 will frequently represent a decrease in the quality of the base stock and increased likelihood of heat
related damage and other problems.
Source/More: http://tinyurl.com/8qufo
oil, its viscosity, and its connection to catalytic converters.
The article starts about mid way down on page 2.
THE CATALYST AND OIL CONNECTION
Kevin S. McCartney
Automotive Support Services
Training, Consulting, Product Development
Catalytic converters provide a huge emission reduction on most automobiles. Many Original Equipment Manufacturers (OEM) depend on catalysts to clean up 99% of exhaust emissions.
<snip>
Many technicians select viscosity based on old habits instead of manufacturer recommendations. The result is that many cars receive engine oil that unnecessarily increases damage to the
catalytic converter and the engine itself. This is especially true in warmer climates. Technicians often assume that thicker oil is required in warmer climates. They often end up with oil that
is thicker but lower quality. IE: replacing a 5W-20 oil with a similarly priced 5W-30 will frequently represent a decrease in the quality of the base stock and increased likelihood of heat
related damage and other problems.
Source/More: http://tinyurl.com/8qufo
