High Performance Diesel Emission Products
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Who is Skyline Emissions?

Skyline is a part of the ESW Group® of companies. We have been producing diesel emission control technologies since 1998 - here is a link to our Corporate Video. We have extensive after-treatment experience, with over 20,000 installations of DPF-based diesel emission control systems in on-road and off-road vehicles across North America. Our products are supported by our knowledgeable and experienced engineering, service and warranty teams. All of our products have been extensively tested in our dedicated emissions testing lab. Our lab contains eight test cells which also perform product development testing for many engine and after-treatment OEM’s. Our products have been, and continue to be, durability tested on trucks like yours that run daily on the roads throughout the United States.

Where can I buy a Skyline Diesel Particulate Filter (“DPF”)?

Skyline DPFs are sold, installed and supported through a network of specialized distributors across North America. Contact us to find the distributor in your area.

What model year range does the Skyline DPF cover?

The Skyline DPF is available for select 2007 and newer diesel engines. Contact us if you have a specific need.

Why should I choose a Skyline DPF product over others?

Skyline DPF’s are designed to be direct replacements to parts from the original equipment manufacturer (OEM), with exact fit geometry. Using OEM-grade substrates and coatings, Skyline provides performance equivalent to the OEM part. In addition to complying with emissions regulations, the Skyline DPF has demonstrated passive regeneration performance 50% greater than other aftermarket products. It is more efficient, it will last longer, and if properly maintained, you will experience fewer warning lights. Essentially, the Skyline DPF is designed to keep your truck in service.

Can I use the Skyline DPF in California?

The Skyline is not approved for sale, installation or use in California.

How do I find the Skyline DPF part I need?

Enter your OEM DPF part number in the search field to find the correct replacement Skyline DPF. Contact your Skyline distributor if you need assistance.

Is there a minimum order?

No, there is no minimum order. Contact us to find the distributor in your area.

Can I order online?

Skyline DPFs are sold, installed and supported through a network of specialized distributors across North America. Contact us to find the distributor in your area. Skyline Distributors can order Skyline DPF’s through www.skylineemissions.com. Contact us if you want to find out more information and criteria for becoming a Skyline Distributor.


What is the warranty on my Skyline DPF?

Skyline DPFs are backed by a 2 year, unlimited mileage warranty.

Who do I contact about warranty questions?

Contact a Skyline distributor or consult your owner’s manual. If you still have questions that have not been answered, email us at warranty@skylineemissions.com.

How do I register my newly purchased Skyline DPF for Warranty?

The DPF must be registered on Skyline’s online warranty registration system or by using Skyline’s warranty registration card that was included with your purchase.

Why does my DPF require periodic maintenance?

Fuel and oil contain inorganic additives (detergents, buffers, etc.). During the combustion process in the engine, these components are turned into an ash that collects in the DPF and cannot be removed using normal regeneration processes. Therefore, a special cleaning is required, according to the OEM recommended DPF cleaning interval. Please be sure to follow the recommended cleaning intervals for your Skyline DPF.

The amount of ash is directly related to the amount of oil an engine consumes. High oil consumption means more ash in the DPF and may require more frequent cleaning.

How do you maintain a Skyline DPF?

The Skyline DPF is designed to be an exact replacement to the OEM part, so you maintain the Skyline DPF just like you maintain the OEM DPF. Refer to your Skyline DPF Owner's Manual for additional instructions and cautions.

My company has its own filter cleaning machine or a preferred service provider. Can I use it to clean my Skyline DPF?

If a filter cleaning machine is approved by the OEM, it can be used to clean your Skyline DPF.

How does the backpressure compare between the Skyline DPF and OEM DPF?

The Skyline DPF is designed to be an exact replacement to the OEM part, including backpressure. ESW has extensively tested the Skyline DPF in our emissions testing facilities and in the field to ensure that performance is equivalent to the OEM product. You can be assured of OEM level performance on every Skyline DPF, as we use only established OEM suppliers for our DPF products.

Why is it not good to idle the engine for long periods?

Extended periods of idling consumes fuel, load up the DPF and reduces the lifetime of your engine. Avoid unnecessary idling. Follow your engine manufacturer’s instructions. In addition, many municipalities and private entities (like warehouses) have strict anti-idling laws or policies.

Why is maintaining an engine important?

A poorly maintained engine lowers your fuel economy, increases emissions and shortens the life of your engine and emissions critical component such as the DPF. Deferred or neglected maintenance items may include the following: maladjusted fuel racks, clogged, worn or mismatched fuel injectors, faulty fuel injection pumps, improper injection timing, leaky turbocharger seals, irregular closed crankcase filter, etc.

Regular vehicle, engine and after-treatment maintenance (including the DPF!), will yield more vehicle “up time”, with reduced operating costs, and maximize your return on the investment that you made in the vehicle.

What do Passive Regeneration and Active Regeneration mean?

As an engine runs, the DPF will collect solid particles, called particulate matter (“PM”) which consists of carbon, unburned fuel and oil and other contaminants from the exhaust. Over time, the DPF can get filled with PM (sometimes referred to as filter loading). To avoid an overloaded DPF, the vehicle’s exhaust system employs catalytic coating and auxiliary fuel injection to clean the DPF. Filter cleaning on the vehicle is sometimes called “regeneration.”

Under driving conditions where the engine produces high exhaust temperatures, for example when you are on a highway or pulling a heavy load, the catalytic coating is sufficient to oxidize most of the captured PM and keep the DPF clean. This cleaning process that takes place without any activity by the engine is called “passive regeneration.”

During driving conditions where the exhaust temperature is not sufficiently high, the vehicle’s exhaust system relies on auxiliary fuel injection to raise the temperature of the DPF to a level at which the most of the PM is oxidized. This process is actively controlled by the engine ECU and therefore called “active regeneration.” The active regeneration occurs periodically and is not noticeable to the driver. Numerous sensors on the engine and exhaust system provide input to the ECU so it can trigger and control the process.

In most cases your vehicle relies on both passive and active regeneration to keep the DPF clean and the vehicle operating normally.