Name: Doc's Diesel 6.7L Powerstroke Fuel & Water Separator (2017–2026)
Brand: Doc's Diesel
Rating: 4.5 (11 reviews)

Product review

Improved filtration media: The element uses a three-layer pleated cellulose–glass media designed to capture fine rust particles and grit that lower-quality filters can miss. The pleat design increases contaminant holding capacity so flow remains consistent over longer service intervals.

Vehicle fitment and scope: This fuel and water separator is produced for 6.7L Powerstroke diesel engines and is confirmed to fit Ford F‑250, F‑350, and F‑450 models from 2017 through 2026. Verify your model year and mounting configuration before ordering; the unit replaces the OE-style fuel/water element for those years.

Construction and performance: The canister is formed from high-strength carbon steel to withstand system pressure and handling. Independent lab testing verifies filtration efficiency to SAE J1985 standards, and the design separates free water from dirt, rust, and debris to protect pumps and injectors.

What you get and service notes: Each filter ships complete with the required o-rings for installation, so no additional seals are necessary. Install as a direct replacement and prime per your vehicle’s procedure. Recommended change intervals are generally every 5,000–10,000 miles, with 15,000 miles as an absolute maximum only if your manufacturer allows it.

Pros

Three-layer pleated cellulose–glass media for finer filtration
High-strength carbon steel housing meets SAE J1985 lab testing
Includes required o-rings for immediate installation

Cons

A few users have reported leakage issues
Not an OEM‑branded filter
Must be changed on a regular manufacturer-recommended schedule

VerdictDoc's Diesel supplies a robust fuel and water separator that uses a pleated, multi-layer filtration element and a reinforced steel housing. It installs like an OE part, ships with the necessary o-rings, and is lab-verified to meet SAE J1985 efficiency. Most owners report reliable fitment and filtration, though a minority have experienced leakage and reverted to factory components. Recommended to s

Reviews

michael dudash 5/5

Performs as expected

Filters functioned correctly and provided good value.
FKNSENDIT 5/5

Multiple purchases, no problems

I've used these for over a year and reordered several times. No issues on my 2017 F‑350 6.7.
bteets 5/5

Good construction

Well-made filters that offer solid value. No leaks so far and installation was straightforward.
Kelsey De León 5/5

Repeat buyer — solid performance

Bought these before and ordered again. They trap dust and debris well and fit perfectly. No leaks after 6,000 miles; I swapped them when I did the oil change.
Stacy P 5/5

Accurate fit

Item matched the description and installed without modification. Fitment was spot-on.
Jason 5/5

Perfect fit on my 2025

Installed on my 2025 model — both elements swapped quickly and fit was excellent. Easier to service than dealer parts.
Bigun 4/5

All components fit

Complete kit, all pieces aligned and installed easily. Good build quality.
Mark Rose 5/5

More substantial than last one

Gave this brand a try; this unit feels sturdier than the previous filter I used.
Richard Servage 5/5

OEM-like quality

Matches OEM fit and function closely.
Christopher Maus 1/5

Leaked; returned to OEM

Tried these in place of Motorcraft to save some money. Installation looked normal, but I found a large leak under the truck the next morning. After attempting a reseal, it continued to drip, so I swapped in Motorcraft parts and the assembly stayed dry. I’ll stick with OEM.
Flybin 4/5

Looks authentic

Haven’t installed them yet, but they appear to be high quality and nearly identical to the originals.