5W-40 Full Synthetic Heavy-Duty Diesel Oil
5W-40 Full Synthetic Heavy-Duty Diesel Oil
Couldn't load pickup availability
Doc's Diesel 5W-40 Full Synthetic Heavy Duty Diesel Oil is designed for modern diesel engines, providing excellent wear protection and performance even in severe conditions. Suitable for both new emissions-compliant rigs and older engines, it features strong oxidation and viscosity control to reduce oil consumption and enhance durability. Made with premium synthetic base oils and advanced CK-4 specification additives, this oil ensures top performance across extreme operating conditions, including those with EGR and DPF emissions systems.
- Innovative Protection - Formulated for durability and reliability, this oil provides excellent oxidation and thermal stability, reducing harmful sludge and deposits in high-stress environments
- All-Weather Performance - Exceptional cold-start capability ensures ultra-low temperature pumpability, delivering fast flow and protection the moment you turn the key
- Extreme Load Stability - With stay-in-grade shear stability, 5W-40 maintains its viscosity under high heat and heavy loads, protecting critical engine components in severe service cycles like high-speed hauls or short-stop deliveries
- Engineered for Modern Emissions Standards - Optimized for 2017 GHG-compliant diesel engines, this formula supports lower CO₂ output and improved fuel economy while delivering endurance for both over-the-road and off-highway use
- Doc's 5W-40 Full Synthetic Diesel Oil Safety Sheet
- Doc's auto parts all have an OEM design, fit, and function that meet or exceed OEM Requirements
Fitment
- 2019-2025 Ram 6.7L Cummins 2500HD, 3500HD, 4500HD, 5500HD
- 2003-2018 Ram 5.9L/6.7L Cummins 2500HD, 3500HD, 4500HD, 5500HD
- 2011-2025 Ford 6.7L Powerstroke
- 1994-2010 Ford 6.0L/6.4L/7.3L Powerstroke
- 2001-2025 Chevrolet/GMC 6.6L Duramax LB7–L5P 2500HD, 3500HD
- 2014-2024 Ram 1500 3.0L EcoDiesel
- 2014–2024 Jeep Grand Cherokee 3.0L EcoDiesel
- 2020–2024 Jeep Gladiator 3.0L EcoDiesel
- 2005.5–2014 Volkswagen Jetta 1.9L / 2.0L TDI
- 2005.5–2014 Volkswagen Golf 1.9L / 2.0L TDI
- 2009–2014 Volkswagen Jetta SportWagen 2.0L TDI
Share
FAQ
How long does shipping take?
Most products ship in 3–7 days. Some will take longer. If a product needs more time, it will say so on its product page.
How do I know if a product fits my truck?
Each product page lists the year, make, and model it fits.
If you’re unsure, you can message us through our website, email, or Facebook, and we’ll confirm fitment for you.
Do you offer installation?
Yes. PSC Automotive & Diesel Repair installs everything we sell.
Call or message us to schedule an appointment.
What is your return policy?
- Returns accepted on new, unused items.
Some items are subject to a restocking fee, depending on the manufacturer.
Electrical parts, tuners, and custom-built items are non-returnable.
Full details are on our Refunds page.
What is your warranty policy?
Our warranty matches the manufacturer’s warranty.
If a part fails or has a defect, we will work with the manufacturer to get it replaced.
We do not warranty parts that were:
Installed incorrectly
Damaged by lack of maintenance
Removed or messed with after installation
Installed by another shop after we installed it
Full warranty details are on our Warranty page.
Will I get tracking information?
Yes. Tracking is emailed to you as soon as your order ships.
Check your spam folder if you don’t see it.
Do you offer customer support?
Yes! You can contact us anytime at:
Website chat
Email
Phone
Facebook or Instagram
We reply quickly during business hours.