2018 Ford Transit 3.7 L Oil Capacity – Maintenance Guide
The 2018 Ford Transit with the 3.7L Ti-VCT V6 engine has an engine oil capacity of 6.0 U.S. quarts (5.7 liters) when performing a standard oil and filter change. To maintain peak performance, it is essential to use SAE 5W-20 motor oil that meets Ford’s WSS-M2C945-A (or updated WSS-M2C945-B1) specifications.
Keeping your engine healthy starts with knowing the 2018 ford transit 3.7 l oil capacity and using the right materials. Whether you use your van for a daily delivery route or a weekend camper conversion, regular oil changes are the foundation of vehicle longevity. In this guide, we will walk through the exact steps, tools, and technical nuances required to do the job like a pro.
Changing your own oil is one of the most rewarding ways to connect with your vehicle while ensuring the job is done right. This guide provides the specific measurements and torque specs you need to avoid common mistakes. Let’s get your Transit ready for the next 10,000 miles of adventure or work.
Understanding the 2018 ford transit 3.7 l oil capacity and Specs
The 3.7L Ti-VCT V6 is a workhorse engine found in many Ford fleet vehicles, known for its balance of power and durability. For this specific engine, the 2018 ford transit 3.7 l oil capacity is strictly 6.0 quarts. This includes the volume held within the oil filter, which you should replace during every service interval.
Using the correct viscosity is just as important as the volume itself. Ford recommends SAE 5W-20 for most operating conditions, as this thinner oil helps the Twin Independent Variable Cam Timing (Ti-VCT) system function correctly. In extremely cold climates, you might consider a full synthetic to ensure better flow during those freezing morning cold starts.
Overfilling the engine can be just as damaging as running it low. Excess oil can lead to aeration, where the crankshaft whips air into the oil, creating a foam that cannot lubricate engine bearings effectively. Always verify the level on the dipstick after adding the initial 5.5 quarts before topping off the final half-quart.
The Importance of the Oil Filter
The standard filter for this engine is the Motorcraft FL-500S. This filter features a silicone anti-drainback valve, which prevents oil from draining out of the upper engine when the vehicle is parked. This is critical for preventing “dry starts,” which cause the most wear on internal components over time.
If you choose an aftermarket filter, ensure it meets or exceeds the flow rate of the OEM part. Heavy-duty users, such as those hauling maximum payloads or driving off-road, may benefit from high-efficiency synthetic filters. These provide better filtration of smaller particulates that can accumulate during high-stress driving.
Essential Tools and Materials for the Job
Before you crawl under the van, gather all your supplies to avoid mid-project trips to the parts store. You will need a 15mm wrench or socket for the drain plug and a sturdy oil filter wrench. Because the Transit sits relatively high, you might not need a jack, but heavy-duty ramps make the process much more comfortable.
You will also need a drain pan with at least a 7-quart capacity to safely hold the old fluid. I highly recommend using a large piece of cardboard or a spill mat under the pan. The 3.7L engine’s oil can sometimes splash against the frame or crossmember when the drain plug is first removed, creating a mess on your driveway.
- 6 Quarts of SAE 5W-20 Motor Oil
- Motorcraft FL-500S Oil Filter (or equivalent)
- 15mm Socket and Ratchet
- Oil Filter Wrench (End-cap style or “spider” style)
- Funnel and Clean Shop Rags
- Replacement Drain Plug Gasket (if the old one is flattened)
Safety First: Working Under a Large Van
If you choose to lift the vehicle, never rely solely on a hydraulic jack. Always use jack stands rated for the weight of a Ford Transit. These vans are heavy, especially if they have been converted into campers or are loaded with tools, so ensure your equipment is up to the task.
Wait for the engine to cool down for about 20-30 minutes after driving. While warm oil drains faster, “operating temperature” oil can cause severe burns if it splashes on your skin. Wear nitrile gloves and safety glasses to protect yourself from chemical exposure and falling debris from the undercarriage.
Step-by-Step Oil Change Procedure
Start by removing the oil fill cap on top of the engine. This allows air to enter as the oil drains, preventing a “glugging” effect that leads to messy splashes. Position your drain pan directly under the 15mm drain plug located at the rear of the oil pan.
- Loosen the Drain Plug: Use your 15mm wrench to break the plug loose. Unscrew it the rest of the way by hand while applying inward pressure to keep the oil from leaking until the very last thread.
- Drain the Oil: Let the oil flow until it slows to a very thin drip. Inspect the drain plug for metal shavings, which could indicate internal engine wear.
- Reinstall the Plug: Clean the plug and the mounting surface. Tighten it to approximately 20 lb-ft (27 Nm). Do not overtighten, as the oil pan is made of aluminum and can strip easily.
- Remove the Filter: Move the drain pan under the oil filter. Use your filter wrench to loosen it. Be prepared, as oil will run down the side of the filter and potentially onto the frame.
- Prep the New Filter: Take a small amount of fresh oil and smear it onto the rubber gasket of the new filter. This ensures a proper seal and makes it easier to remove during the next change.
- Install the New Filter: Spin the filter on by hand until the gasket touches the base. Tighten it an additional 3/4 to 1 full turn. Never use a wrench to tighten the filter; hand-tight is sufficient.
Refilling and Checking the Level
Insert your funnel into the oil fill neck and pour in 5.5 quarts of the recommended 5W-20 oil. Stop here and let the oil settle for a minute. Replace the fill cap and start the engine, letting it run for about 30 seconds to circulate the oil into the new filter.
Turn off the engine and wait 5 minutes for the oil to drain back into the pan. Pull the dipstick, wipe it clean, reinsert it, and check the level. It should be near the top of the crosshatched area. Add the remaining 0.5 quarts to reach the full 2018 ford transit 3.7 l oil capacity mark.
Choosing the Right Oil: Synthetic vs. Synthetic Blend
Ford ships the 2018 Transit with a Synthetic Blend oil from the factory. This is a cost-effective option that provides excellent protection for standard driving. However, many DIYers and fleet managers prefer moving to a Full Synthetic oil for several key reasons.
Full synthetic oils offer better thermal stability, meaning they won’t break down as quickly under high heat. If you use your Transit for towing or frequent mountain driving, synthetic oil is a smart investment. It also flows better at low temperatures, reducing wear during those first few critical seconds after you turn the key.
Regardless of which type you choose, ensure the bottle carries the API “Starbust” symbol. This confirms the oil meets the latest industry standards for engine protection and fuel economy. Using high-quality oil is the cheapest insurance policy you can buy for your 3.7L engine.
Severe Duty vs. Normal Duty Intervals
The 2018 Ford Transit uses an Intelligent Oil-Life Monitor (IOLM) to tell you when it’s time for service. Under normal conditions, this might be every 7,500 to 10,000 miles. However, the system adjusts based on how you drive. If you idle frequently or drive in dusty off-road environments, the light will come on much sooner.
For those of us who push our vans to the limit—carrying heavy loads or driving in extreme heat—I recommend a more conservative 5,000-mile interval. This ensures that the additives in the oil haven’t depleted, keeping the internal Ti-VCT components clean and free of sludge.
Common Pitfalls and Maintenance Tips
One common mistake is failing to check if the old oil filter’s rubber gasket stayed stuck to the engine block. This is called “double-gasketing.” If you install the new filter over the old gasket, oil will spray out under high pressure the moment you start the engine, potentially ruining your motor in seconds.
Another tip for 3.7L owners is to inspect the PCV (Positive Crankcase Ventilation) valve while you are under the hood. A clogged PCV valve can cause internal pressure to build up, leading to oil leaks at the valve covers or the rear main seal. Replacing it every 60,000 miles is a cheap way to prevent expensive leaks.
- Always check for leaks around the drain plug and filter after the first drive.
- Keep a logbook of your oil changes to maintain your vehicle’s resale value.
- Dispose of used oil responsibly at a local auto parts store or recycling center.
- Never mix different oil viscosities (e.g., 10W-30 with 5W-20) unless it is an absolute emergency.
Dealing with Oil Leaks
If you notice the oil level dropping between changes, inspect the oil pressure sending unit. These are known to develop small leaks over time on the 3.7L Duratec family of engines. It is located near the oil filter and is relatively easy to replace if you catch it early.
Also, keep an eye on the oil pan gasket. While the 2018 ford transit 3.7 l oil capacity is 6 quarts, a leaking gasket can quickly turn that into 4 quarts. If you see “wet” spots on the bottom of the engine, clean them with brake cleaner and check back after a few days to pinpoint the source.
Resetting the Intelligent Oil-Life Monitor
After you have finished the physical work, you must tell the van’s computer that the oil has been changed. If you don’t reset the system, you will get a “Change Oil Soon” warning even though you have fresh lubricant in the sump. The process is simple and can be done from the driver’s seat.
Turn the ignition to the “On” position but do not start the engine. Use the directional pads on your steering wheel to navigate the dash menu. Go to “Settings,” then “Vehicle,” and finally “Oil Life Reset.” Hold the “OK” button until the system confirms the reset to 100%.
For vans with the base instrument cluster, the process might involve pressing the brake and gas pedals simultaneously for about 20 seconds while the ignition is on. Watch the screen for a message saying “Oil Reset in Progress” followed by “Oil Reset Complete.”
Frequently Asked Questions About 2018 ford transit 3.7 l oil capacity
How many quarts of oil does a 2018 Ford Transit 3.7L take?
The 2018 Ford Transit with the 3.7L V6 engine takes exactly 6.0 quarts of oil. This measurement includes the capacity of the oil filter. It is always best to add 5.5 quarts first, check the dipstick, and then add the final half-quart to avoid overfilling.
What is the best oil for a Ford Transit 3.7L V6?
The manufacturer recommends SAE 5W-20 motor oil. For the best protection, use a high-quality synthetic blend or full synthetic that meets Ford’s WSS-M2C945-B1 specification. Brands like Motorcraft, Mobil 1, and Pennzoil are excellent choices for this engine.
Can I use 5W-30 instead of 5W-20 in my Transit?
While 5W-30 won’t immediately destroy your engine, it is not recommended. The 3.7L Ti-VCT system relies on specific oil pressures and flow rates to adjust valve timing. Using a thicker oil can lead to “sluggish” timing response and potentially trigger a Check Engine Light (CEL).
How often should I change the oil in my Ford Transit?
Ford suggests following the Intelligent Oil-Life Monitor, which usually triggers between 7,500 and 10,000 miles. However, if you use your van for heavy towing, delivery work with lots of idling, or off-road travel, a 5,000-mile interval is safer for long-term engine health.
Conclusion
Taking care of your 2018 ford transit 3.7 l oil capacity requirements is the most effective way to ensure your vehicle stays on the road. By using 6 quarts of high-quality 5W-20 oil and a Motorcraft FL-500S filter, you are protecting the complex Ti-VCT system and ensuring the engine remains clean and lubricated.
Remember to always prioritize safety when working under your vehicle and to double-check your work for leaks. DIY maintenance not only saves you money but also gives you a chance to inspect other components like belts, hoses, and suspension parts. Stay proactive, keep your tools ready, and enjoy the peace of mind that comes with a well-maintained engine!
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