CJ 4 Oil

What Are The Benefits Of Using API CJ-4 Motor Oil?

It has been about three years since API CJ-4 diesel engine oil was introduced.  In the past when a new API category diesel engine oil was introduced, the previous category was typically discontinued.  Today both API CJ-4 and the previous category API CI-4 PLUS diesel engine oils are available.

However, there are many benefits to using the latest technology found in API CJ-4 motor oil. Each new generation of motor oil provides incremental improvements and benefits for your diesel engine. API CJ-4 motor oils provide a significant improvement  in wear protection, soot and deposit control, and high-temperature stability over API CI-4 PLUS motor oils.

API CJ-4 motor oils were designed to meet the needs of the newest generation of engines built beginning in 2007, as well as provide improved protection for engines built prior to 2007.

In pre-2007 engines, API CJ-4 motor oil provides the latest protection. Engines using this higher-performance motor oil can experience significantly less wear in the valve train and power cylinder areas of the engine.  In addition, API CJ-4 motor oil provides increased protection against heat and increased soot handling capabilities, which can help enforce engine cleanliness.

By using API CJ-4 motor oils, you are able to use one product that meets the needs of new and older engines and helps to avoid confusion about which motor oil belongs in different types of engines. By using only an API CJ-4 motor oil such as Shell Rotella® T with Triple Protection™ technology, you won’t run the risk of using a non API-CJ4 motor oil in a new generation engine, which could result in increased maintenance costs.

In addition, Shell Rotella T Synthetic 5W-40 heavy duty motor oil which meets or exceeds API CJ-4 specifications is available as well.  The motor oil offers significant improvements in wear protection, soot control, deposit control, heat resistance and protection in extreme climates compared to the previous formulation.  Shell Rotella T Synthetic can also provide enhanced fuel economy verses conventional 15W-40 motor oil.


– Tech Tip courtesy of Shell (www.shell.com)


You May Also Like

LTR Engine Build

This Late Model Engines build is centered around Concept Performance’s new LTR block, which is the first aftermarket as-cast aluminum Gen V LT block. 

The Chevrolet LT engine family from General Motors is rooted in the early ‘70s, when the LT1 was featured in the Corvette and Camaro Z28. After a 20-year hiatus, GM reintroduced the platform in the early ‘90s. The “LT1 350” came out in 1991, and was distinct from the high-output Gen I LT1 of the 1970s. It displaced 5.7L (350 cu in), and was a two-valve per cylinder pushrod design. The LT1 used a reverse-flow cooling system, which cooled the cylinder heads first, maintaining lower combustion chamber temperatures and allowing the engine to run at a higher compression than its immediate predecessors.

LS Intake Manifolds

LS swaps are popular for many reasons, but there are a lot of variations and details to sort through – more of them than you may expect – and many of them are associated with the intake manifold.

LS Cylinder Heads

The LS engine is known for its cylinder heads, and there are tons of options available to upgrade the factory components.

Choosing the Correct Block for Your LS Engine Build

Whether you’re scouring junkyards, ordering cores, investigating factory options, looking at aftermarket cast iron or aluminum blocks, or spending big bucks on billet LS blocks, you’ve probably noticed it’s been harder to find exactly what you want for the foundation of your LS build than it historically has.

Open Loop/Closed Loop and Learning

Closed-loop control can be programmed to either add or subtract up to a certain percentage of fuel in order for the engine to reach the target air/fuel ratio.

Other Posts

Shop Solutions January 2023

Next time you have set of large journal small block Chevy connecting rods to resize, consider honing the big ends of them for a +.002” outside diameter bearing that the LS engines with fracture cap rods use.

Shop Solutions December 2022

Everyone misses occasionally, and this helps avoid dents and damage.

Jesel Certified Performance Rebuilds

Engine components are serious investments for any racer and maintaining that investment could be the difference between winning a championship and losing it.

Going the Extra Mile with Cylinder Head Porting

It’s not just the port work alone that creates spectacular cylinder head performance. The most critical areas of a cylinder head are those which pass the most air at the highest speed and for the longest duration. Your bowl area, the valve job, the throat diameter, and combustion chamber are all crucial parts.