For those who or your company owns 2007 or 2008 diesel pick-ups or “on-highway” heavy-duty diesel trucks, you may be questioning why the truck manufacturer is so adamant about using motor oil that meets the American Petroleum Institute (API) “CJ-four” specification within the engine. You could also be questioning if you’ll be able to “get by” with a motor oil that doesn’t show this designation on the label. The reply is not any! You can not “get by” with a diesel engine oil assembly the older API “CI-four” or “CI-four PLUS” specifications in these engines. There’s a excessive chance that costly injury will be the end result if you happen to try.
How did all of this begin? Just a few years again, the U.S. Environmental Safety Agency (EPA) determined that starting within the 2007 model year, strict new limits were going to be placed on the emissions of on-highway diesel engines in heavy obligation and decide-up purposes. This is able to limit the quantity of nitrogen oxide and particulate matter emitted by the exhaust pipe. The EPA determined that by means of a mixture of engine redesign, extremely-low-sulfur diesel (ULSD) gasoline and new engine oil expertise, these new autos would lower dangerous pollution by 95 percent.
Crucial of those engine changes are the addition of exhaust after-remedy devices and increased exhaust gas recirculation (EGR) charges. Both of these modifications demanded a dramatically different strategy to formulating a diesel engine oil.
The exhaust after-remedy gadgets getting used are “diesel particulate filters”. These particulate filters take away soot from the exhaust allowing for a lot cleaner emissions. Collected particulate matter is ed from the filter by burning it off at elevated working temperatures. Older generations of diesel engine oils contained additives which can plug or harm particulate filters. The new CJ-4 engine oils have strict limits on sulfur, sulfated ash and phosphorus content. A plugged or damaged particulate filter shouldn’t be solely very costly to scrub or change, it may cause severe drops in fuel financial system resulting from elevated back pressure.
One other vital change mandated by the EPA was to decrease the sulfur content of diesel gasoline by a whopping ninety seven%. Starting in September 2006, the sulfur ranges in diesel gasoline (for on-road use) had been restricted to 15 parts per million (ppm) from 500 ppm. This was executed so that the gas wouldn’t harm the new exhaust after-therapy devices. This was a priority to many as sulfur was an important additive that offered lubrication to gas pumps and injectors. The gasoline firms were not mandated to exchange the sulfur with another element to supply pump and injector lubrication. It is a good suggestion so as to add an aftermarket gasoline additive to your diesel gas to stop premature pump and injector wear. This is a good suggestion for all diesel engines using ULSD gasoline. Be sure that the additive is designed to offer fuel system lubrication and that it’s compatible with exhaust particulate filters and ULSD fuel.
With the exhaust filter removing the particulate matter from the emission, the duty of removing nitrogen oxide is accomplished by increasing exhaust fuel recirculation (EGR) rates by as much as 35%. EGR units redirect some of the exhaust gases normally emitted by the exhaust pipe, back into the engine. This fee improve generates extra soot and acids as well as rising working temperatures. This was another purpose for the radical modifications in the design of the CJ-four specification. These new hostile operating situations require that the engine oil have a better resistance to heat, a greater dispersant package to handle the upper levels of soot and a higher potential to stop depositing and oxidation. CJ-4 oils are also much less unstable which means that they are extra resistant to consumption.
CJ-4 oils will supply the last word in efficiency and safety for put up-2007 diesel engines. To take away the nuisance of fleets having to inventory completely different diesel motor oils for trucks built before and after the 2007 model yr, CJ-four oils are designed to be “backwards suitable” with pre-2007 diesel engines. Fleet house owners can inventory just one CJ-4 diesel motor oil to service all of their diesel trucks.
