How to Make Your Car Last Forever by Thomas Torbjornsen

Author:Thomas Torbjornsen
Language: eng
Format: epub
Publisher: MBI
Published: 2011-03-24T16:00:00+00:00

Reading the encryption on an oil can can be like deciphering Egyptian hieroglyphs if you don’t know what you’re reading. Its best to go to your owner’s manual. If you don’t have one, call your dealer service department. It’s especially important to use the correct oil in today’s engines because of tight internal tolerances and high operating temperatures. Using the wrong engine oil can result in engine failure.

UNDERSTANDING THE DESCRIPTION ON AN OIL CAN

Q What do the letters and symbols mean on the bottle, such as API, SJ, CF, CG-4? Or SAE 5W30?

A API stands for the American Petroleum Institute, which provides the standards that high quality oils must meet.

SL means it’s for all automotive engines currently in production. SL oils are designed to provide better “high-temperature deposit control” and lower oil consumption.

SJ means it’s for 2001 and older automotive engines.

SM oils are designed to provide improved oxidation resistance, improved deposit protection, better wear protection, and better low-temperature performance over the life of the oil.

CF was adopted in 1994 for use in indirect injected off-road diesel engines that use a broad range of fuels, including those with high sulfur content. It offers effective control of piston deposits, wear, and corrosion of the copper-coated bearings used in this type of engine.

CF-2 is formulated for use in two-stroke diesel engines requiring highly effective control over cylinder and ring-face scuffing and deposits.

CF-4 covers oils for use in high-speed, four-stroke diesel engines. They are designed for use in on-highway heavy-duty truck applications.

CG-4 describes oils for use in high-speed, four-stroke diesel engines, and is suitable for both highway and off-road applications. They provide effective control of high-temperature piston deposits, wear, corrosion, foaming, and oxidation stability and soot accumulation. These oils are especially effective in engines required to meet 1994 emission standards.

CH-4 is for use in high-speed four-stroke engines designed to meet 1998 exhaust emission standards. CH-4 oils are specifically compounded for use with diesel fuels ranging in sulfur content up to 0.5 percent weight. It can be used in place of CD, CE, CF-4, and CG-4 oils.

CJ-4 is for 2007 and newer diesel engines. It was developed to address special concerns regarding emission control engines and their operation on ultra-low-sulfur diesel fuel (ULSD).

SAE stands for Society of Automotive Engineers. Motor oils have SAE grades, or numbers, that indicate viscosity. In other words, the SAE numbers tell you the thickness of the oil. The higher the number, the thicker the oil.

Q What does a viscosity rating of 5W30 mean?

A W signifies its winter rating, showing that it will perform well in cold weather. The number and letter designation signifies the winter flow weight of the oil. Colder temperatures tend to thicken oil so that it flows more slowly, which can be disastrous to your car’s engine. Therefore, in mixing the oil, the refinery adds a chemical (or package) that adjusts and stabilizes the oil at the lighter weight when it gets cold outside. Consequently, it will flow more easily and freely at subzero temperatures. The higher

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