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  1. Engine Oil Coolers
  2. Derale
  3. Tube-Fin Cooler
  4. W/ Sandwich Adapter
  5. With 3/8 Inch NPT
  6. Class III
Derale Tube-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class III

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

Our Price: $143.48
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Engine Oil Coolers
Shipping Weight: 21 lbs
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Derale Tube-Fin Cooler - D15505
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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 sandwich 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 D15505 or order online at Free expert support on all Derale products. Great prices and Fastest Shipping for Derale Tube-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class III. Engine Oil Coolers reviews from real customers.
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  • Reviews (20)
  • Q & A (0)
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Derale Engine Oil Coolers

  • Tube-Fin Cooler
  • W/ Sandwich Adapter
  • With 3/8 Inch NPT
  • Class III
  • 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 sandwich 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
  • Cools effectively through use of tube-fin core
  • Provides external lines, via sandwich adapter, for simple installation of oil cooler without having to reposition oil filter
  • Includes:
    • Tube-and-fin cooler core
    • Sandwich adapter
    • High-temperature, high-pressure rubber hose with stainless steel clamps
    • Brass hose-barb adapters
    • Multiple sleeve nuts to ensure proper thread size
    • Complete mounting kit
  • 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"
  • Sandwich adapter:
    • Inlet/Outlet ports: 3/8" NPT
    • O-ring diameters: 2-3/4" and 3-1/2"
    • Engine filter thread size: 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
  • 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 sandwich adapter in this kit provides the external oil lines necessary to install a cooler without requiring you to move the factory spin-on oil filter, making it even easier to extend the life of your vehicle's engine. In addition, the thermostatic bypass feature allows oil cooler than 180 degrees to bypass the heat exchanger, so your engine will warm up faster.


15505 Derale Tube and Fin Engine Oil Cooler Kit with Sandwich Adapter, Type A

Item # D15505

Installation Details D15505 Installation instructions

Customer Reviews

Derale Tube-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class III - D15505

Average Customer Rating:  4.4 out of 5 stars   (20 Customer Reviews)

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


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.


It has been 1 year now. Here is the story.

Ram 1500 5.7 w/3.92 gears.

Oil temp at speed with no trailer: 224
Oil temp at speed with Springdale Mini RV: 240 (backed off at that point….it would have kept climbing)

After the install:

Oil temp at speed with no trailer: 200ish.
With trailer 210-220

Before I did this, I had to keep it at 55 in the expressway to keep my oil from turning into charcoal. Now I can drive normally. Only at the hottest part of the summer on a long grade did I ever brake 230 and it cooled right back off at the top of the hill.

Also holds about another quart of fluid which I like from a wear/tear perspective.

Even if the temp wasn’t an issue this kit would be worth it to move the oil filter to a non-retarded spot. I opted to go with the frame on the right side. Can change filter from side if wheel is turned. Very nice.


My vehicle is a 2010 Ram 1500 5.7 Hemi 4x4. Overall product is great, those Conti hoses are awesome and little hard to get on lol but only issue I had I couldn’t retain my factory mopar oil filter which isn’t a big deal I got a WIX filter that fit. Thanks for quick shipping and great product! Will be buying a transmission cooler from you soon!


Installed this on my 2012 Jeep Grand Cherokee overland with the hemi as the oil temp was heating up while towing. The install was not fun as I had to remove the front fender, grill and under body shield. Had to relocate oil filter to driver side and as a result, ran out of hose and had go out to buy more. Wish there was a few more feet. I placed oil cooler in front of radiator.

Once installed, oil cooler has worked great as I regularly go off-roading and camping towing a 6k pound trailer. Oil temps stay 20-30 degrees cooler making a huge difference when towing. No issues with the oil cooler after a year of use. Has been a great product, I would recommend it.


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.


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.


Easy to install but make sure you use quality thread tape. Check for leakage after 300 miles of driving. Then check again.


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.


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.


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.


just what i needed easy install nice quality


Doesn't take long to install.


Great product. Easy installation.


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



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



Recieved item on time, great quality.




See what our Experts say about this Derale Engine Oil Coolers

  • Is Engine Oil of 230 Degrees Too Hot for Truck
    Actually your engine oil temperature isn't bad at all. Ideally when a vehicle is warmed up the engine oil is between 230 and 260 degrees which yours being 230 is perfectly fine. Since engines are kept cool with coolant that does not directly cool the oil the engine oil can get warmer than the coolant. But since oil actually likes to be warmer this is perfectly fine! Also the thread sizes of the # D15505 you referenced are not compatible.
    view full answer...
  • Engine Oil Cooler Recommendation for a Pre-1980 Chevy 350 Small Block
    The 1958-1980 Chevrolet oil filters had 13/16 inch-16 thread sizes and used a gasket that have a diameter of 3-1/2 inches. The Derale Tube-Fin Engine Oil Cooler Kit # D15505 that you referenced would be the correct choice for you since it has components that will fit both of those requirements.
    view full answer...
  • Engine Oil Cooler that Fits a Chevy 350 (5.7 Liter) Motor
    Yes, you can use Derale Tube-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter (Multiple Threads) - Class III Item # D15505 on a Chevy 350, 5.7 liter motor. It takes the 13/16"-16 engine filter thread size and will use either a 2-3/4" or 3-1/2" o-ring (both sizes included). So this kit has everything you will need!
    view full answer...
  • Reducing Engine Oil Temperature Using Derale Tube-Fin Engine Oil Cooler Kit # 15505
    Typically a system like the Derale Tube-Fin Engine Oil Cooler Kit, # D15505, is used on vehicles where high oil temperatures are a concern, like one that is towing during the summer months. The thermostatic adapter will allow oil that is cooler than 180 degrees to bypass the cooler. The temperature of the oil when it entered the cooler will vary depending on the outside temperatures, driving conditions, how the system is set up, etc. Allowing the oil to flow through the tubes cools the...
    view full answer...
  • Removing Oil Cooler Sandwich Adapter
    The sleeve nut and the sandwich adapter are actually two separate pieces. It is possible that the adapter is loose enough to turn, but the nut is staying in place. Try using some channel lock pliers (put a rag around adapter so you do not damage it) to hold the adapter stationary while you loosen the sleeve nut. This should allow the whole thing to come off for you.
    view full answer...
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  • Does the Derale Tube-Fin Engine Oil Cooler Fit a 95 GMC 1500?
    Yes. The Derale Tube-Fin Engine Oil Cooler # D15505 is a universal fit product that is designed to work on a large number of vehicles without any major modifications. This is a complete kit that includes a variety of installation hardware to fit multiple vehicles including: a 3/8" NPT sandwich adapter, 3/4-16, 13/16-16, 18 x 1.5mm, 20 x 1.5mm and 22 x 1.5mm sleeve nuts, 1/2" x 10' high heat, high pressure oil hose, hose barb fittings, a cooler mounting kit and hose clamps.
    view full answer...
  • Oil Cooler for Use on a Motorcycle
    Engine oil gets much hotter than power steering fluid so a power steering cooler such as # D13310 would not do much of anything to cool the oil on a motorcycle. Additional parts would also be needed so I do not recommend it. For an oil cooler something such as # D15505 would work much better and actually cool the oil.
    view full answer...
  • What Transmission Cooler Kit is Best for a 2001 Saturn L300
    The D15505 is a bit larger than what a 2001 Saturn L300 would need or could fit. There are 5 recommended kits for your L300 based on the vehicle size and towing capacity. I have added a link to them below. Transmission kits are not vehicle specific. However, you need to make sure you have space to accommodate the cooler. On each of the cooler pages, you can find the dimensions of the cooler. Measure the space on your vehicle where you would like to mount the cooler and make sure you have...
    view full answer...
  • 2015 Ford Transit Solutions for 2015 Ford Transit that Overheats When Towing in Warm Weather
    An oil cooler would be exactly what you would need to keep your 2015 Ford Transit from getting too hot when towing. I did some checking and the oil filter threads you would have on your van would be 22 mm x 1.5 mm which is a size that the Derale Cooler part # D15502 is compatible with. You can also look into running distilled water in your radiator during the summer months this will also drastically reduce coolant temperatures. There's a product called Water Wetter that helps as well....
    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...
  • Oil Cooler Recommendation for a 2004 Ford Escape
    I did some checking and it looks like the Derale Tube-Fin Engine Oil Cooler Kit w/ Adjustable Sandwich Adapter # D15505 will work on your 2004 Ford Escape. From the research I did the threads on the oil filter are 22 x 1.5 mm and the # D15505 comes with that size so it should work very well for you. I attached an FAQ article on oil coolers for you to check out also.
    view full answer...
  • Recommendation on an Engine Oil Cooler on a 2008 Toyota Tacoma with 4.0 L V6
    I have a solution for you for an engine oil cooler for your 2008 Toyota Tacoma. The Derale Tube-Fin Engine Cooler Kit w/ Adjustable Sandwich Adapter, # D15505, is a tube-fin cooler design that uses the sandwich adapter to connect to the oil filter base on the engine. The kit includes multiple filter sleeve nuts for multiple applications on different vehicles. For your 4.0L V6 on your Toyota, you will need to use the 3/4 inch -16 thread sleeve for your application. For a more higher performance...
    view full answer...
  • Which Engine Oil Cooler Kit will Work on a Chevy 350 Crate Motor In a 1934 Ford
    If your filter is the larger style GM filter you will need to use the Derale Tube-Fin Engine Oil Cooler Kit w/ Sandwich Adapter (Multiple Threads) - Class III, item # D15505, which includes the adapter for the larger filter. If you are not sure which filter you have the # D15505 will work on the engine without the use of the adapter. If you have the smaller filter on your vehicle you can use the Derale Tube-Fin Engine Oil Cooler Kit w/ Sandwich Adapter (Multiple Threads) - Class III,...
    view full answer...
  • Combination Transmission/Oil Cooler for 2010 Chevy Tahoe Towing Small TT from Arkansas to Alaska
    The Derale combination transmission/engine oil cooler # D13302 would be an excellent choice for you, if you have the space available directly behind the grille to accommodate its 16-13/16" wide x 12-5/8" tall x 3/4" deep size. If you need something a bit smaller, you can go with the # D13222 which measures 12-13/16" wide x 10-1/4" tall x 3/4" deep. For the transmission cooler circuit, you'd need the # D13064 hardware kit and the # D13035 fitting. For the oil cooler circuit, you'd need...
    view full answer...
  • Adding an Engine Oil Cooler and a Power Steering Cooler to a 2007 Toyota 4Runner SR5 4.0L V6
    Thanks for asking about a Power Steering Cooler and Engine Oil cooler for your 2007 Toyota 4Runner SR5 V6. Adding two more coolers is not going to present a cooling issue for your engine/radiator. The coolers allow air to flow through them and will not transfer enough heat to the air going through them to effect the cooling performance of the vehicle's radiator. Your engine oil filter has 3/4-16 threads. So you can determine the correct threads to use from the recommended kits below,...
    view full answer...

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