Dodge Cummins

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Dodge Cummins
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In the past most fuel dilution issues of crankcase oil in turbo charged diesel engines meant there was a mechanical problem of some kind. For 2007 and newer Ford 6.4L, Dodge 6.7L and Gm/GMC 6.6L turbo diesel engines, the emission control systems sometimes are the culprit, as these have been installed to meet more stringent environmental protection agency requirements pertaining to soot.

Not everyone will experience dilution problems, as it will depend largely on how you operate your vehicle. Post 2007 turbo diesels are equipped with a Diesel particulate filter as mandated by the environmental protection agency. These filters reduce the soot emitted by as much as 85%. After so long, these filters have to go through a cleaning process called regeneration. Regeneration can occur during operation when exhaust gas temperatures reach 1,100 degrees. This happens regularly when the engines are worked as intended, such as towing and hauling and is called passive regeneration. It is when these engines are operated around town with no load is when temperatures are to low to passively burn off the soot.

When temperatures do not reach 1,100 degrees, an active regeneration must take place. Two systems are used. In-stream injection and In-cylinder post injection. What happens is raw diesel fuel is introduced into the diesel particulate filter increasing the internal temperature to burn off the soot that has accumulated.

With In-stream injection, the fuel is introduced through a separate injector either behind the turbo charger or in the exhaust stream just prior to the particulate filter. This type of active regeneration is largely used on medium to heavy-duty diesel engines. In-stream does not contribute to fuel dilution.

In cylinder post injection has been adopted by the manufacturers of lighter turbo diesel trucks, mainly because of the lower cost. With this system, the diesel fuel is injected directly into the cylinders with the present injectors but on the exhaust stoke as well as the compression stroke, sending the unburned fuel through the exhaust ports to the particulate filter and be burned that way. This system works well at delivering the fuel to the particulate filter but has the drawback of promoting fuel dilution of the crankcase oil.

As the fuel is injected on the exhaust stroke, fuel is able to pass by piston rings and wash down the cylinder walls as well, entering the crankcase and diluting the oil. Diesel fuel is a solvent and can reduce oil viscosity and film strength of the oil. An increase in oxidation can also occur.

At this point, there is no correlation between fuel dilution and abnormal engine wear. This is a rather new issue and still being studied. Condemnation limits have been set at 5%. Oil analysis samples have shown 7 to 10% dilution rates.

If you have one of these turbo diesels and work it hard, active regeneration will be at a minimum, as will the chance of higher limits of fuel dilution. It will be beneficial for you to have your oil analyzed periodically to see what the saturation level may be in your oil. It would also be a good idea to use premium oil that can better withstand the effects of fuel dilution.

In closing, for the 2011 Ford and General Motors are changing to a system called selective catalytic reduction, eliminating In-cylinder post injection. The Dodge Cummins turbo charged pickups will continue to use In-cylinder Injection for the upcoming year.

Thomas Chiaruttini is a railroad engineer and self taught mechanic with over 30 years experience maintaining and repairing vehicles. He also understands how high quality synthetic lubricants can result in less time spent under the hood or in the repair shop. http://www.tollgatesynthetics.com

Your Diesel Exhaust System Options

If you are looking for a diesel exhaust system to enhance your performance, the choice can be a tough one. Diesel gets more and more popular all the time and because of this there are many viable options on the market for your diesel exhaust. In addition to diesel exhaust, there are also many chips and tuners that will help enhance your performance, which makes the choice of an exhaust even more overwhelming. Luckily, there are a few brands that are well known for delivering the best in diesel exhaust for performance each and every time. If you are looking to improve your Chevy Duramax, Dodge Cummins, or Ford Powerstroke engine you can definitely maximize your diesel performance with the right exhaust.

Magnaflow

Magnaflow is definitely a brand that is well recognized and respected in the diesel exhaust market. Magnaflow has really embraced diesel performance and they have a tried and true formula that matches the right amount of air with the measured amount of fuel for the most power. A Magnaflow diesel exhaust system will help your diesel engine maintain a normal temperature to lengthen the life of your engine. With a Magnaflow diesel exhaust system, you have the benefit of years of experience in diesel performance on your side, and you know that the exhaust system will compliment all Dodge Cummins engines.

Magnaflow is one of the latest contributors to the four-inch performance diesel exhaust that has become standard. Magnaflow has also introduced a stainless steel mandrel bent system that carries a lifetime warranty, polished muffler and five-inch tip. The Magnaflow diesel exhaust system is definitely one that has made its mark and is a great choice for your vehicle.

MBRP

MBRP is also another great diesel performance company that can offer you the best in diesel exhaust systems. The MBRP Dodge Cummins exhaust is considered a must have if you are working with a Dodge Ram. The MBRP promises maximum gains with a direct bold on application that comes with a four-inch turbo down pipe. The MBRP will simply add horsepower, torque, improved fuel economy, and will lower exhaust gas temperatures. This is a quality buy for anyone looking to enhance diesel performance.

Bully Dog

Bully dog is another outstanding diesel exhaust company that will provide custom-made diesel performance systems for your Ford, Doge, or Chevrolet truck. Bully dog will promise immediate improvements in horsepower, throttle response, and pulling torque, not to mention the exhaust system looks awesome. Bully dog exhaust systems also lower gas temperatures by more than 200 degrees, which is ideal when you are pulling heavy loads. The bully dog performance exhaust packages will also increase gas mileage. A good exhaust system from a great company.

Banks

If you are looking for a diesel performance exhaust system from a company that knows diesel, Banks is an outstanding company. They've been around since 1897 improving the use of diesel for performance big and small. Banks is a company constantly implementing innovative techniques with a quality and consistency not often found.

As you can see, there are a lot of options for your diesel exhaust, depending on the type of truck you have, and what you want to see in the way of performance. These are all top-notch brands that you'll likely be happy with.

About the Author

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What is the best year to buy a Cummins dodge ram?

im looking for a 2500 dodge cummins, and wanted to know what the differences were from year to year, and what each model(big horn, larime) was

best years on those trucks was from 98-2005,all of those was good,the laramie was the nicest edition one they built with all available options on it,i bought a 97 model 3500 laramie diesel and i like it pretty good so far,you wont be disappointed in one if you buy one with a diesel engine in it ,at 250 thousand its just getting broken in good,good luck on it.

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