When completing an engine conversion using a Subaru EJ-series engine, every component must be carefully selected for compatibility and long-term performance. One of the most overlooked yet essential components in such builds is the oil pan.
It plays a critical role in managing oil flow, pressure stability, and ground clearance, all of which are vital in a modified application.
For vehicles such as VW Beetles, T3s, Bay Window Vans, and even classic Porsches, the stock Subaru oil pan is often too large or poorly suited for the new chassis layout. In these cases, a properly designed, high-capacity oil pan is not just an upgrade; it is a necessity.
Choosing a solution from a dedicated manufacturer ensures the part was purpose-built for your swap, offering advantages that mass-produced alternatives cannot match.
Why High-Capacity Oil Pans Outperform Stock Versions
Subaru’s OEM EJ-series pans typically hold around 4.2 litres of oil. That might work in factory conditions, but in a custom build, it’s often not enough. More oil means better thermal management, longer oil life, and less risk of oil starvation, especially under load or in high-mileage engines.
Key Benefits Of Increased Capacity
- Better cooling: More oil disperses heat more efficiently
- Stabilized oil pressure: Especially during hard cornering or elevation changes
- Reduced wear on internal components: More oil cushions and lubricates longer
- Compensates for oil consumption: Critical for older engines prone to burning oil
In fact, Specialised Parts’ oil pans offer two high-performance options to meet different build needs and engine conditions, each designed for optimal fit and performance.
Two High-Performance Options To Choose From
Below are two high-performance oil pans to choose from:
Option 1: High-Capacity Oil Pan (Increased Ground Clearance)
- 5.4 litres of oil capacity (vs 4.2L stock)
- 110 mm height (vs 168 mm stock)
- Ideal for moderate-height builds needing more oil and better clearance
Option 2: Ultra High-Capacity Oil Pan (Better Ground Clearance)
- 7.1 litres of oil capacity
- 147 mm height
- Ideal for older, high-mileage EJ engines where oil consumption is a concern
Pro Tip: We recommend Option 2 if you’re running a high-mileage Subaru engine. The extra oil volume compensates for consumption and helps reduce the risk of oil starvation under stress.
Why Dedicated Manufacturers Do It Better
Not all oil pans are created equal. Generic pans are often built to fit everything, which means they’re optimized for nothing. Fitment issues, warped flanges, and poor oil pickup alignment are all common.
When you buy from a dedicated manufacturer like Specialised Parts, you get:
- A product designed specifically for Subaru EJ engine swaps
- Proven fitment for chassis like VW Beetle, Bus, T3, Vanagon, Bay Window, and Split Window Vans
- Precision machining and casting, no guesswork, no compromises
These pans aren’t just rebranded parts. They’re engineered for performance, reliability, and ease of installation.
Built-In Features That Set Our Oil Pan Apart
Specialised Parts has gone the extra mile in designing an oil pan that solves problems, not creates them. Here’s what you get:
Cast Aluminum Construction
The pan is made from cast aluminum, not thin steel or fabricated aluminum. Cast construction provides:
- Exceptional durability under temperature and vibration
- Superior thermal dissipation
- A factory-clean finish
Integrated Cooling Fins
Cooling fins are cast into the body to increase surface area and help keep oil temperatures down, especially during long drives, summer heat, or off-road use.
Reinforced Side Walls
The pan includes cast-in strengthening ribs to reduce flexing and improve durability, especially important for engines under load or in bumpy terrain.
Compact, Clearance-Friendly Profile
Both oil pan options are shorter than the OEM Subaru pan, giving you the clearance you need in tight swaps without sacrificing capacity.
What’s Included With Every Oil Pan
Your purchase isn’t just a pan, it’s a complete solution, packaged with everything you need for installation.
Each oil pan includes:
- Stainless Steel hex-head bolts
- Rubber-bonded steel washers (prevent leaks through bolt holes)
- Magnetic drain plug (captures loose metal particles)
- Drain plug seal
- Shortened oil pickup tube (or standard-length, depending on option)
- Oil pickup O-ring
About Us
Specialised Parts is a leading manufacturer and supplier of conversion auto parts designed for Volkswagen vehicles running Subaru drivetrains. Our mission is simple: to deliver engineered, high-quality solutions that solve real problems in custom builds.
We focus on performance, compatibility, and reliability for DIY builders and conversion shops across North America.
Looking to learn more or check fitment for your specific build? Contact us today; our team is ready to help you get the perfect part for your project.
