Semi Truck Engine Oil

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Semi Truck

Benefits of using AMSOIL for your semi truck engine oil change

On a semi truck engine, 25,000 miles go by in a flash. Normal preventative maintenance intervals can cost owner-operators and companies thousands in downtime and extra expenses, and every few years, the engine still needs to be rebuilt. AMSOIL can make all the difference for drivers and fleet managers who want to keep their trucks running longer and with lower routine service of semi truck lubricants, not to mention staving off repairs for months or years longer.

What motor oil is best for long-haul trucks?

For a fleet manager, breakdowns away from home are the worst-case scenario – to be avoided at all costs. For decades, conventional 15W40 motor oil was seen as the best option to protect heavy-duty diesel engines and keep them in good working order. In cold weather, 5W40 was often preferred due to a lower pour point, but it left engines more exposed to wear over time. Today, the best diesel engine oil is fully synthetic, and it’s much better at protecting a truck’s engine from the carnage that tends to happen with millions of miles.

Find Semi truck diesel engine oil change supplies, including your oil filter and other popular products for semi trucks.

Find AMSOIL® Synthetic Lubricants for Semi Trucks

We ship Semi Truck oil change supplies directly to our customers! Get started with our lookup to find our Pricing.

lookup semi truck engine oil supples

AMSOIL has several grades of Signature Series Max-Duty Synthetic Diesel Oil, including 15W40, 5W40, 0W40, 5W30, and even 20W50. By using AMSOIL for semi truck diesel engine oil changes, you can get your truck back on the road fast and keep it there.

Semi Truck diesel engine oil with 6X's more protection

We know AMSOIL truck lubricants are the best engine protection your money can buy, but don’t just take our word for it. Third-party testing shows Signature Series Max-Duty Synthetic Diesel Oil delivers 6X more protection against wear than required by Detroit Diesel’s® standard.*

*Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation.


customer review

Max-Duty 5W30


customer review

Max-Duty 10W30


customer review

Max-Duty 0W40


customer review

Max-Duty 5W40


customer review

Max-Duty 15W40

Reduce Costs, Reduce Hassle, Reduce Worries with AMSOIL for Semi Trucks

Commercial AccountWhether you own a single truck or manage a large fleet, using AMSOIL can effectively reduce repair costs associated with wear and tear. We understand that dealing with new vendors can be a hassle, but with AMSOIL, the administrative process is seamless. Moreover, when you buy multiple lubricants and supplies for your trucks, you qualify for fleet discounts, enhancing the overall cost-effectiveness.

If you’re uncertain about the right oil for your semi-truck and are struggling with the logistics of purchasing and delivery, AMSOIL simplifies the entire process. Trust AMSOIL to guide you in your decision on semi-truck lubricants. We offer various package sizes and flexible delivery options, ensuring the oil you need is conveniently delivered to your doorstep. Our semi truck engine oil change supplies lookup matches you with the most suitable products, guaranteeing your satisfaction.

Switching to synthetic oil with AMSOIL is a straightforward process. With a range of package sizes and delivery choices, you can easily receive the required oil at your location, making the transition hassle-free.

Our Commercial business accounts save on semi truck lubricants and supplies.

Engine Oil Analysis

Our Oil Analysis and testing kits help you understand what is happening inside your engine and the condition of your engine oil. They also tell you how long your engine oil can last.

AMSOIL's Heavy-Duty and Commercial Grade diesel engine oil

Third-party testing shows Heavy-Duty synthetic diesel oil delivers 4X more protection against wear than required by Detroit Diesel’s® standard.*

*Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation.


customer review

Heavy-Duty 10W30


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Heavy-Duty 5W40


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Heavy Duty 15W40

15W-40 Commercial Heavy Duty Lubricants

Synthetic-blend diesel oil with greater than 50% synthetic content. Meets or exceeds original equipment manufacturer requirements for semi truck engine oil in both on- and off-road applications.

Third-party testing shows Commercial Grade Diesel Oil delivers 2X more protection against wear than required by Detroit Diesel’s® standard.*

*Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222.

Commercial Grade

Customer Review

15W40 Semi truck diesel engine oil

This product is designed to be cost-effective compared to other popular brands, and provides double the wear protection to help extend the life of the equipment and minimize the costs associated with maintenance and downtime.

Data Sheet

Most of the API-approved diesel oils we tested had between 1-15% synthetic content. AMSOIL 15W-40 Commercial-Grade Diesel Oil (SBDF) is a highly advanced oil with more than 50% synthetic base oil content and meets the latest API CK-4 diesel-oil specification.

Benefits of using AMSOIL® for semi truck engine oil change

Better protection against soot

It’s not even close. Compared to the other best diesel engine oil brands, AMSOIL controls diesel engine soot the best, preventing abrasion on metal components. When soot levels are high, regular diesel engine oil carries soot particles to moving parts where they defeat the purpose of the oil’s protective barrier. AMSOIL protects the engine’s metal parts by encapsulating soot particles and carrying them away to be filtered out.

Better fuel economy

AMSOIL’s truck lubricants provide top-notch service, helping to prevent wear and tear, as well as increasing fuel efficiency by up to 3%. Any fleet manager knows how fast that adds up! It’s due to lower internal resistance to flow, measured by the oil’s viscosity, which is gauged by the oil viscosity, leading to less fuel being used to power the truck. With these benefits in mind, any fleet operator looking to maximize their MPG should certainly consider using the best synthetic diesel engine oil. Who wouldn’t love a few more MPG on semi-trucks in their fleet?

Less engine oil consumption

Do your semi trucks tend to burn oil between oil change? That’s considered normal. An engine can consume as much as a gallon of the best diesel engine oil between oil changes, but AMSOIL’s exceptional capacity to lubricate prevents gouges in cylinder walls and wear on piston rings, and also better seals the gap between the two. The result? Up to 38% less engine oil consumption, so don’t be surprised when you check the engine’s oil and other truck lubricant levels.

“Newsstand @” Million Mile Trucker

Are you worried about diverging from the current oil change methods and manufacturer’s fluid recommendations? Switching to synthetic oil can be risky, especially if you have an engine that might leak oil if you switch to synthetic oil. Contact us for an engine oil testing kit and work towards bridging the gap to less oil changes and better MPG.

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More great products from AMSOIL "The First in Synthetics"®

AMSOIL has products that enhance performance, longevity, durability, and fuel economy. For semi trucks, that includes:

  • Diesel All-In-One to clean diesel fuel injectors, reduce cold-weather gelling, and boost cetane to elevate performance.
  • Severe Gear and Long Life Synthetic gear lube for optimal bearing protection and high-load lubrication.
  • Engine oil filters, bypass oil filters, air filters, fuel filters, and transmission oil filters for most heavy-duty applications.
AMSOIL truck lubricants for semi-trucks

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Semi Truck oil change supplies
diesel engine oil (pdf)


Commercial Heavy Duty Lubricants and Semi Truck Oil

Are you operating with a business name? Our commercial account gives wholesale pricing for semi-truck engine oil, oil filters, diesel fuel injector cleaners, transmission oils, extreme pressure (EP) gear oil, grease, and heavy-duty engine antifreeze.

With so many products available, using our Semi Truck Oil Change Lookup can help you find pricing for the best synthetic diesel engine oil and other shop supplies. To all customers… thank you for your customer reviews.

Non-business buyers can choose the Preferred Customer pricing and save up to 25% on AMSOIL prices.

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