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  1. Engine Oil Coolers
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  3. Tube-Fin Cooler
  4. With 1/2 Inch NPT
  5. Class III
  6. W/ Spin-On Adapter
Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) - Class III

Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) - Class III

Item # D15551
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Engine Oil Coolers
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Derale Tube-Fin Cooler - D15551
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16-5/8" Wide x 7-5/8" tall x 3/4" deep, efficient, tube-and-fin cooler core comes with a spin-on adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve its overall performance. 1-800-940-8924 to order Derale engine oil coolers part number D15551 or order online at Free expert support on all Derale products. Guaranteed Lowest Price and Fastest Shipping for Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) - Class III. Engine Oil Coolers reviews from real customers.
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  • Reviews (12)
  • Q & A (0)
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  • Why etrailer?

Derale Engine Oil Coolers - D15551

  • Tube-Fin Cooler
  • With 1/2 Inch NPT
  • Class III
  • W/ Spin-On Adapter
  • Derale
  • 16-5/8W x 7-5/8T x 3/4D Inch

16-5/8" Wide x 7-5/8" tall x 3/4" deep, efficient, tube-and-fin cooler core comes with a spin-on adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve its overall performance.


  • Prolongs life of engine oil, reducing number of necessary changes
  • Improves overall functioning and performance of engine
  • Reduces oil temperature by as much as 50 degrees to maintain optimum temperature
  • Cools effectively through use of efficient, tube-fin core
  • Provides external lines for heat exchanger via spin-on adapter
  • Includes:
    • Tube-and-fin cooler core
    • Ports-up filter mount
    • Spin-on adapter
    • High-temperature, high-pressure rubber hose with stainless steel clamps
    • Multiple fittings to ensure proper engine thread size
    • Brass hose-barb fittings
    • Mounting hardware
  • Made in USA


  • Heat exchanger:
    • Dimensions: 16-5/8" wide x 7-5/8" tall x 3/4" deep
    • Distance between inlets: 6-1/4"
    • Core width: 13-7/8"
  • Spin-on adapter:
    • Inlet/Outlet ports: 1/2" NPT
    • Filter thread: 3/4"-16
    • O-ring diameters: 2-1/2", 2-3/4" and 3-1/2"
  • 1-Year warranty

Perhaps the simplest type of heat exchanger, the tube-fin effectively cools a variety of automotive systems. The concept is simple: Fluid cools as it travels through the core by transferring heat out to the fins. The fins then provide the surface area necessary for sufficient heat exchange to take place, allowing the heat pulled from the fluid to dissipate into the surrounding air. The result is longer-lasting oil and a better-functioning engine.

The spin-on adapter in this kit allows for the external oil lines necessary to install an engine cooler by converting your vehicle's oil-filter landing into a passageway. Because the adapter mounts where your filter normally is, you will have to use the mount provided to move your oil filter to another location.


15551 Derale Tube and Fin Engine Oil Cooler Kit with Spin-On Adapter, Type J

Installation Details D15551 Installation instructions

Customer Reviews

Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) - Class III - D15551

Average Customer Rating:  4.2 out of 5 stars   (12 Customer Reviews)

16-5/8" Wide x 7-5/8" tall x 3/4" deep, efficient, tube-and-fin cooler core comes with a spin-on adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve its overall performance.


To start I gave the product a good rating only because the kit put together by Derale came with the wrong barb fittings. I called Derale directly and they sent out the right fittings. I have not installed the kit yet but it is well made in the USA. If the kit would of came with the proper barb fitting definitely would of got a excellent rating.


Product was exactly as advertised. Product was shipped quickly, very happy with service.


Recieved item on time, great quality.


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

It doesn't fit my car even though the website said it would. I had already installed the radiator component before i found the filter adapter didn't fit so i couldn't return the product.

This is a universal kit, so there is no guarantee whether it will fit your application. In order for us to assist you, we need pictures and to know what made the adapter not fit.
-- Etrailer Expert Katrina B - 05/31/2022


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

This is a quality product and performs great. Installed on a 2012 Toyota Tacoma and had to have some machine work accomplished and a change from the original oil filter. Installation was straight forward after those issues were resolved.


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

Installed this product on my 2013 Ram 5.7 Hemi. Install was simple and straight forward. I hoped there would be improvements in the operating temperature of my engine oil, which there was. Now towing my trailer is no worry about engine oil temp. This cooler works exactly as advertised, and the temp never go above 220. An unexpected result was better gas mileage by almost 2 additional miles per gallon. Also the truck runs much quieter than before and smoother. This noticed by my wife who rides with me always. So I would defiantly call this a win win install and purchase.

This upgrade to my Ram has paid for itself after one year of use by extending the oil life thus reducing oil change interval
Ed S - 06/20/2017


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

I purchased this kit 1 year ago for an 08 Toyota Highlander V6 Sport. The vehicle had a small (and I mean small) trans cooler already installed with the sport, but adding this additional cooler gives us the piece of mind an confidence that when either towing or evening just sitting in temps up to 116F at the drive through in SoCal during summer hours, my family will stay cool. The fans run less and the whole vehicle runs a bit cooler as well. I have verified this with 3rd party OBD readers, actively watching oil temps both at normal operating temps, hill climbs, towing, and when sitting in extreme heat. IT DOESNT BUDGE! I dont have enough good things to say about this cooler. If youve ever thought about it, you should do it. Very easy to install and it flat out works.


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

just what i needed easy install nice quality


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

Bill is very knowledgeable and answered all my questions. Good fella, I can't comment on the product yet because I haven't installed it yet. Thanks Jesse


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

Great product. Easy installation.


Review from a similar Tube-Fin Cooler in Engine Oil Coolers

Happy to find a system with the adapter. Mounted to my 4runner very easily. Not much confidence in the plastic mounting method will make something else.


Review from a similar Tube-Fin Cooler in Engine Oil Coolers


Ask the Experts about this Derale Engine Oil Coolers

  • What is the Additional Oil Capacity from Adding Derale Oil Cooler # D15551
    My contact at Derale advised that the approximate additional oil capacity resulting from the installation of their oil cooler # D15551 will be in the vicinity of 7 - 8 fluid ounces. This can vary depending on the length of the oil lines since some vehicles/installations may use all of the supplied hose while others do not. It is always best to check your dipstick to ensure you are operating your vehicle with the correct amount of engine oil.
    view full answer...
  • Derale Engine Cooler Recommendation for a 1994 Motor Home with a Ford 460 Engine
    I did some searching and it looks like the Ford 460 engine has a filter thread size of 3/4 inch-16. The Derale Tube-Fin Engine Oil Cooler Kit # D15551 that you referenced is designed to work on this thread size so it should work well for you. I attached an FAQ on engine coolers for you to check out also.
    view full answer...
  • Does Derale Oil Cooler Use a Thermostat
    The Derale Tube-Fin Oil Cooler # D15551 does not use a thermostat. The filter installs inline with the oil lines and a thermostat will block the flow of oil until the specific temperature is reached. Depriving your engine of oil is certainly not something you want to do. The Derale cooler is a great choice for your 2014 Ram 1500. It will cool the engine oil, prolonging the life of your engine, without over cooling in low temperatures.
    view full answer...
  • Engine Oil Cooler Kit for 2017 Ram 1500
    The Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) # D15551 is not a vehicle-specific fit. It will work for your 2017 Ram 1500 so long as you have the required space to mount it; the heat exchanger is 16-5/8" wide x 7-5/8" tall x 3/4" deep so as long as you have that amount of space it will work for you.
    view full answer...
  • Recommended Engine Oil Cooler for 2010 Dodge Challenger
    Based on my research, it looks like your Dodge Challenger uses the 3/4"-16 filter thread size, so the spin-on adapter that is included with the Derale Tube-Fin Engine Oil Cooler Kit # D15551 that you were looking at will actually work perfectly. I do recommend confirming this on your vehicle, as its possible you have a different model. This cooler kit also includes the high-temperature, high-pressure rubber hose with stainless steel clamps. This is a really nice, tube-and-fin cooler that...
    view full answer...
  • Power Steering Fluid Cooler For Motorhome On F53 Chassis
    The Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) - Class III # D15551 that you were looking at is a universal cooler that can be used for engine oil, power steering fluid, or transmission fluid. It is a very popular option and would work well on your F53 motorhome as long as you have room for it: 16-5/8" Wide, 7-5/8" tall, 3/4" deep. This kit comes with multiple fittings to ensure proper thread size. I attached a demonstration video for you.
    view full answer...
  • Oil Cooler for 2012 Jeep Grand Cherokee Overland w/ the 5.7 Hemi Engine
    I did some research your 2012 Jeep Grand Cherokee 5.7 Overland has 22 x 1.5mm oil threads. The Derale Tube-Fin Engine Oil Cooler Kit w/ Spin-On Adapter (Multiple Threads) - Class III item # D15551 is the correct cooler for your Jeep. The kit includes adapter thread sizes: 3/4"-16, 13/16"-16, 18 x 1.5mm, 20 x 1.5mm, & 22 x 1.5mm. I have linked an installation video.
    view full answer...
  • Engine Oil Cooler with an Oil Filter Relocation Kit for a 2004 Ford F-250
    You need an engine cooler kit with a spin-on adapter, # D15551. This kit also has the multiple threads and O-ring options. I have included a link to a video showing a typical isntallation and a link to the installation instructions for you.
    view full answer...
  • Oil Drip from Unidentified Small Cooler Attached to Transmission on a 2006 Chrysler 300
    It sounds like it could be a transmission cooler. What you can do is when the vehicle is cold, start it up and place it in drive for about 10 seconds or so. Then return it to park and turn off the motor. Feel the hoses and if one is noticeably cooler than the other then it is a transmission cooler. Coolers are normally found inside of the radiator. It is possible that someone has installed a supplemental one on the vehicle if there were other owners before you. If it looks like # D13260...
    view full answer...
  • How to Install a Derale Engine Oil Cooler, Part # D15505, in a 1970 to 1974 Hotrod
    Engine oil coolers are not brand- or model-specific; you can install an oil cooler as large as the space you have available to mount one, which is generally in front of the radiator and/or air-conditioning condenser on vehicles so equipped. With coolers, larger is better. This particular kit is intended for vehicles with an engine block oil filter landing between 2-3/4 inches and 3-1/2 inches. If your vehicle oil filter landing falls outside this range you will need to select an alternate...
    view full answer...
  • Combination Oil and Transmission Fluid Cooler for a 1998 Chevy C1500 Pickup Truck with 5.0 Liter
    The filter thread size where the oil filter installs on the motor on your 1998 Chevy C1500 5.0 liter is 13/16-16 so # D15902 would fit your truck. I have included a link to a video showing an example installation. The size of this cooler will work just fine with the size trailer you plan to tow.
    view full answer...
  • Recommended Oil Cooler for a 2005 Chevy Trailblazer 4.2 Liter I-6 Engine
    There are three basic types of heat exchangers. Tube and fin, plate and fin and stacked plate. Stacked plate being the most efficient. Take a look at the informative article about oil coolers I included. The cooler I recommend is the Derale stacked plate oil cooler kit with Sandwich adapter # D15602 because it's super efficient and one of our most popular ones we currently offer. It will reduce oil temps by as much as 50 degrees. The external lines via the sandwich adapter makes installation...
    view full answer...
    Image 1 for
  • Will the Derale Tube-Fin Engine Oil Cooler Kit # D15502 fit a 2007 Chevy LTZ Suburban
    Yes, the Derale Tube-Fin Engine Oil Cooler Kit, item # D15502, will fit on your 2007 Chevrolet Suburban as long as there is room below the OEM oil filter location to install the sandwich adapter and then reinstall the oil filter on the vehicle. The sandwich adapter is 2 inches thick so you can measure to be sure that when the adapter is installed you will have room to remove and install your oil filter for normal maintenence. If you do not have enough room to install the the sandwich adapter...
    view full answer...
  • Engine Oil Cooler for a 2007 Chevy Silverado New Body Style with 6.0 Liter Motor
    Since the Derale Combination Transmission and Engine Oil Cooler # D15902 is both a transmission and oil cooler it would need to take the place of the cooler that you have. However this will likely provide less transmission fluid cooling than your existing external cooler. What I recommend for your 2007 Silverado (New Body) with 6.0 liter motor is to just add a small oil cooler only so that you will get the maximum benefit of both coolers. I recommend Derale Tube-Fin Engine Oil Cooler Kit...
    view full answer...
  • Reommended Transmission Cooler for 2008 Nissan Rogue
    Transmission coolers are not vehicle specific, so you will need to consider the clearance of the location you wish to install the cooler. There are different styles. The Derale Series 8000 Plate-Fin Transmission Cooler Kit w/Barb Inlets, part # D13503, is a plate and fin cooler and actually performs differently than a tube and fin style cooler like # D15551. I have attached a FAQ article that explains the difference in transmission coolers and how they work. A plate and fin cooler is...
    view full answer...
  • Can an Oil Cooler and Filter Relocation Kit be Used Together
    Yes, you can use the Derale Oil Filter Relocation Kit # D15748 with an oil cooler. The cooler should be placed so that the oil goes through the cooler last. The addition of an oil cooler and the hoses for it will increase the amount of oil you will need so be sure to check the oil after installation and add however much is needed. You could use kit # D15551 which is a cooler and it has the relocation parts all in one kit. We installed this set up on a co-worker's truck. I have linked the...
    view full answer...
  • Tube-Fin Oil Cooler Kit with 2-1/2" O-Ring for Yanmar 1500 Tractor
    The Derale Tube-Fin Engine Oil Cooler Kit # D15503 that you referenced has an O-Ring diameter of 3-1/2". For a cooler with a 2-1/2" O-Ring diameter you want the Kit # D15551 instead which has the exact same dimensions as the one that you referenced and is a Class III Tube-Fin style oil cooler. I have attached the installation instructions for you to check out as well.
    view full answer...
  • Transmission Cooler Pan for a 1997 Pace Arrow Vision Motorhome
    I do have a solution for you but the Derale Transmission Pan Cooler part # D14208 is the only transmission pan we have available for Ford E4OD, 4R100, 5R110 and 5R110W transmissions. This pan as you referenced is 6-1/8" tall from the top flange to the bottom base. If this blocks the O2 sensor on your exhaust then you can simply plug this bung and weld a new one on the other side of the pipe or wherever you have space in that same general vicinity.
    view full answer...
  • Engine Oil Cooler Kit for a Komatsu PC45R-8 with Yanmar 4 Cylinder Engine
    The Napa Oil Filter 1324 you have has M20x1.5mm threads which means the correct Derale Tube-Fin Engine Oil Cooler Kit for your Yanmar engine is part # D15502. You will need to use the sleeve nut with a black paint marking.
    view full answer...
  • What Size Oil Filter Needs To Be Used After Installing the Derale Tube-Fin Engine Oil Cooler Kit
    Once the Derale Tube-Fin Engine Oil Cooler Kit part # D15551 is installed, you can use any oil filter with 3/4"-16 threads. For this, we have the Replacement Filter for Derale Remote Transmission Filter Kits part # D13092 or you can use any of the ones in the attached photo.
    view full answer...
    Image 1 for
  • Oil Cooler that Fits 2013 Ram 1500 with 5.7 liter Hemi
    I did some checking and your 2013 Ram 1500 with the 5.7 liter Hemi has oil filter threads that are M22x1.5 which means that for a cooler kit you'd want the # D15405 which includes a fitting that matches this size. The cooler that comes with this is a plate-fin style cooler which is incredibly efficient so it will do a great job keeping your oil as cool as possible.
    view full answer...
  • Recommendation For Transmission/Engine Oil Cooler on 1995 Ford Ranger V6 Towing 2750 lb Trailer
    An engine cooler and a transmission cooler are always good items to have on your vehicle when towing a trailer. Even though you mention the outside temperatures will be cold, the strain that towing a trailer will put on the engine and transmission of your vehicle will still increase the temperatures of the oil and fluid in your vehicle. The coolers will help keep those temperatures at their best operating levels for optimum life and performance of the engine and the transmission I recommend...
    view full answer...
    Image 1 for
  • Engine Oil Cooler Recommendation for a 2001 Dodge Ram with 360 Cubic Inch Motor
    The engine oil temperature should only be a concern if you notice that the gauge, if you have a gauge, is above the normal operating temperature. It can also be a concern when towing or carrying things in the bed of the truck. Adding an engine oil cooler will lower the temperature by as much as 50 degrees depending on where the core is mounted. Engine oil temperature should be between 180 and 200 degrees for the engine to function the best so if your engine oil routinely goes above that...
    view full answer...
  • Will Derale Engine Spin-On Adapter Kit w/ Dual Side Ports, # D15746 Fit a 1991 Dodge Caravan
    The Derale Engine Spin-On Adapter Kit w/ Dual Side Ports, # D15746, is not vehicle specific, so it may fit your 1991 Dodge Caravan as long as the oil filter thread size is 3/4 Inch-16. If you are looking for a spin on adapter, you would need to use Derale Engine Spin-On Adapter Kit, # D15747, which has adapters for engine filter thread sizes 3/4-16, 13/16-16, 18 mm x 1.5 mm, 20 mm x 1.5 mm, and 22 mm x 1.5 mm. If you are looking for a complete kit, I recommend the Derale Tube-Fin Engine...
    view full answer...

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