WHAT TO LOOK FOR ON A MOTOR OIL
he symbol at left is referred to as the "API
DONUT". It gives you three pieces of information. API (American Petroleum
Institute) Service Rating - this two letter classification identifies the vehicle fuel
type and quality level of the motor oil. The first letter indicates the vehicle fuel type
that the oil is designed for. Ratings that begin with an "S" are intended for
gasoline engines. Ratings that begin with a "C" are for diesel engines. The
second letter designates the quality level of the motor oil. The higher the letter, the
more advanced the oil and the more protection it offers your engine. An SJ oil can be used
in any engine requiring an SB, SG, SH, etc. oil.
There are two types of
motor oils, single grade and multigrade.
Multigrade oils such as a 10W-30, are designed to have the viscosity of an SAE 10W oil at
cold temperatures combined with the viscosity of an SAE 30 oil at engine operating
temperatures. The "W" or "Winter designation indicates that the oil meets
viscosity requirements for low temperatures (below 30°F).
SAE (Society of Automotive
Engineers) Viscosity Grade. Viscosity is a measure of an oil's thickness,
or resistance to flow. Lower numbers indicate thinner oil and higher numbers indicate
ENERGY CONSERVING. Oils displaying this
phrase are formulated with friction modifiers to improve fuel economy in an industry
The International Lubricant Standardization and Approval Committee (ILSAC), in association
with the API, have created a symbol for the front of the bottle that indicates that an oil
meets both the latest performance category, SJ, and the ENERGY CONSERVING standard.
engines in passenger cars and light duty trucks beginning with 1997 models.
||Oil designed for this
service level provides greater fuel economy, lower volatility and lower phosphorous limits
over the previous SH category.
||Minimum Duty Gasoline Service.
||For engines operating under conditions mild enough
to require only minimum protection. Non-detergent oil. Should not be used in an engine
unless specifically recommended by the equipment manufacturer.
injected diesel engines and two-stroke diesel engines.
||Provides effective control of piston
deposits, wear and bearing corrosion in a broad range of fuel types often found in
off-road applications. Provides effective control over cylinder and ring-face scuffing and
deposits in two-stroke cycle engines.
Be sure to check your owners manual to make the correct
||-25 degrees C
||Provides excellent fuel economy and low
temperature performance in most late model automobiles. Recommended for non-turbocharged
engines. Especially recommended for new cars.
||Most frequently recommended viscosity grade for most
automobile engines, including high performance multi-valve engines and turbo-charged
||-20 degrees C
||The first multigrade introduced. A good
choice for controlling engine wear and preventing oil breakdown from oxidation. Note:
Always check your owner's manual or warranty requirements before using this grade.
||Provides maximum protection for high performance, high RPM
racing engines. Excellent choice for high temperatures and heavy loads such as driving in
the desert or towing a trailer at high speeds or long periods of time.
|-5 degrees C
0 degrees C
|For cars and light trucks, where
recommended by manufacturers. Not recommended when cold temperature starting is required.
| Engine Additives | Techron
Motor Oils & Automotive Lubricants | How To Read A Motor
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