- Diesel Engine OIL
Introducing Just Autos Engine Oil
Our fully synthetic 5W-30 diesel oil is now in every Just Autos upgrade.
Are you using the right engine oil for your Vehicle?
After years of tuning, testing, and pushing engines to their limits, we decided we wanted to go above and beyond with engine protection for our customers.
We’re passionate about finding the best solutions for our customers’ needs, so we started the journey to create our own engine oil that ensures your engine stays strong and responsive during off-road adventures, towing, or long drives across tough terrains.
Common Challenges in Modern Engine Lubrication
-
Before we started our journey, we had to understand what the issues were affecting modern engines.
- High-Temperature OxidationEngines operating in harsh conditions, like towing or long drives, face high temperatures. Smaller oil sumps struggle to dissipate heat, accelerating oil oxidation, thickening, and varnish buildup, which reduces performance and reliability, especially in remote areas.
- Increased Mechanical StressModern diesel engines generate high horsepower with compact components, placing stress on the crankshaft, rods, and pistons. This increases loads, cylinder pressures, and engine speeds, requiring oils with enhanced durability and protection to ensure long-lasting performance.
- Impact of Emission Control SystemsEmission control devices like PCV, EGR, and DPF increase oil temperatures and introduce contaminants, adding extra strain on the oil and compromising its effectiveness.
Bring in the experts.
We didn’t guess our way to this oil. We teamed up with Rafe, a lubrication specialist, and a group of world-class lubricant chemists who live and breathe base oils. Starting from proven formulations, we iterated to create something that suits the way our customers actually use their cars: heavy towing, long highway stints, corrugations and heat. The brief was simple: engineer an oil we’d run in our own builds, inside manufacturer requirements, and make sure it’s right for Australian conditions from cold starts to summer climbs.
From there, it was practical testing, lab validation, then workshop use during pre-dyno inspections and distributor fit-ups, refining until we landed on a 5W-30 we’re confident in for modern diesel platforms where that grade is specified. No shortcuts, no bargain-bin blends, just a focused product shaped by real-world use and the right experts behind it.
WATCH THE JOURNeY
Benefits of OUR Fully Synthetic 5W-30 Diesel Engine Oil
With advanced formulation, our fully synthetic 5W-30 diesel engine oil may offer benefits beyond what’s typically expected from standard oils.
Advanced Compatibility
Designed for use in modern diesel vehicles equipped with Diesel Particulate Filters (DPF), Three-Way Catalysts (TWC), and catalytic converters.
Soot Management
Delivers outstanding soot dispersancy and robust protection against soot-related wear.
Engine Cleanliness
Enhanced oxidative stability and superior deposit control, including excellent piston cleanliness.
Support for increased Mechanical Stress
Engineered to perform under harsh and demanding conditions, providing exceptional protection and performance for modern diesel engines.
WHY IS AN OIL UPGRADE NECESSARY?
Upgrading to our Fully Synthetic 5W-30 Diesel Engine Oil is essential for anyone relying on their diesel vehicle in demanding conditions. Modern diesel engines, especially those towing, crawling or driving long distances, run hotter and face increased mechanical stress, which standard oils often can’t handle.
This oil is purpose-built for those environments. It manages soot effectively, keeps the engine clean, and provides strong wear protection, all while being compatible with emissions systems like DPFs. Whether you’re towing a van or heading off-road, it’s about keeping your engine reliable, clean, and protected—especially when you’re miles from help. No gimmicks, just high-grade engineering made for real-world use.
Frequently Asked Questions
What Sets Just Autos Fully Synthetic 5W-30 Diesel Engine Oil Apart
Just Autos Fully Synthetic 5W-30 Diesel Engine Oil is a premium, ultra-high performance engine oil designed for modern light-duty diesel engines. It meets the latest and most demanding specifications to provide reliability, protection, and performance, even under harsh conditions like towing, off-roading, and long-distance driving.
Is this engine oil compatible with modern diesel vehicles?
Yes, Just Autos Fully Synthetic 5W-30 Diesel Engine Oil is specifically engineered for use in modern diesel vehicles equipped with Diesel Particulate Filters (DPF), Three-Way Catalysts (TWC), and catalytic converters, ensuring advanced compatibility with these systems.
How does this oil handle soot and contamination?
This oil offers outstanding soot dispersancy and robust protection against soot-related wear. It also helps maintain engine cleanliness by providing enhanced oxidative stability and superior deposit control, keeping the piston areas clean and free from buildup.
Can this oil withstand extreme temperatures?
Yes, Just Autos Fully Synthetic 5W-30 Diesel Engine Oil is designed to deliver stable performance in extreme temperatures, thanks to its high viscosity index (164.7), making it ideal for harsh environmental conditions and high-demand driving situations.
How does the oil protect the engine?
The oil provides long-lasting protection and cleaning with a Total Base Number (TBN) of ≥8.0, which helps to neutralize acids and keep the engine clean. Additionally, the oil includes anti-wear additives like phosphorus (771 ppm) to extend engine longevity and ensure reliable performance.
What kind of driving conditions is this oil designed for?
Just Autos Fully Synthetic 5W-30 Diesel Engine Oil is ideal for a wide range of driving conditions, including everyday commuting, heavy towing, off-road touring, and crawling. It is engineered to perform under the extreme stress and conditions that these activities demand.
GET THE SDS SHEET
START YOUR UPGRADE JOURNEY TODAY:
*Just Autos and this website are not affiliated with, endorsed by, or associated with Toyota. All trademarks, service marks, and logos used on this website are the property of their respective owners. The mention of Toyota on this website is solely for informational purposes and does not imply any partnership, sponsorship, or affiliation.
