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Introducing the Three Newest AMSOIL Products

Engine Degreaser

Introducing the Three Newest AMSOIL Products

AMSOIL is well-known for its products that protect the internal parts of an engine. But you may not know about our products that protect the outside of your vehicles and equipment, too. Hot on the heels of the revolutionary new SEVERE GEAR easy-pack, we’re excited to announce three more products that will have the outside of your vehicles and equipment looking as pristine as the moving parts inside.

AMSOIL Mudslinger®

Sioux Falls ATV customers were asking about this before we had it! Now we do!

Mudslinger is a pretreatment specifically formulated to leave a non-stick surface that provides a protective layer of armor against the accumulation of mud, dirt and snow on ATVs, UTVs, snowmobiles and dirt bikes. This protective layer causes mud and dirt to release easier with low-pressure water, making cleaning faster after riding. UV rays can fade colored surfaces over time. AMSOIL Mudslinger resists the harmful effects of UV rays and helps equipment keep its original luster and shine with a pleasant cherry scent.

AMSOIL Engine Degreaser

You don’t need much to see results. Works without having to warm the engine up.

This professional-strength formula removes the toughest grease, dirt and grime from engine surfaces. Formulated with powerful degreasing solvents, it delivers a powerful stream that’s safe to use on all engine components and leaves no residue. Simply spray on and wash off with water.

AMSOIL Glass Cleaner

Oh man!! This glass cleaner works so well you may want to call your brother and alert him about it. Also let’s your wife know the $$ all these years spent on AMSOIL went to legit R&D.

Glass Cleaner provides a professional-strength formula that cuts through grease and grime quickly and effectively. Its ammonia-free formulation is safe on all glass including tinted windows. It remains in place where sprayed and will not drip or run, leaving no streaks or haze behind.

The Pinnacle of Performance

New Industry Leading 100% SYnthetic Oil to surpass engine tests no other oil can come close

The Pinnacle of Performance

The new Signature Series Synthetic Motor Oil formulation builds upon its rock-solid foundation to offer enthusiasts a new level of engine protection.

Signature Series Synthetic Motor Oil

Improving Signature Series was a challenge, but the results prove the new formulation blows the doors off the latest industry standards. Capitalizing on its firmly established success, our upgraded Signature Series Motor Oil provides enthusiasts with maximum protection and performance. The new formulation will become available in September or when current inventory is depleted.

Formulation Change? Yes

Date Available?  September (rolling change)

New Stock Numbers? No

Price Change? No

  • 75 percent more wear protection1
  • 100 percent protection from LSPI2
  • Trusted by professional engine builders
  • Ideal for turbos & direct injection
  • 50 percent more cleaning power3
    •  Guaranteed protection for up to 25,000 miles or 1 year
    (in normal service)


Maximum Wear Protection

Signature Series Synthetic Motor Oil provides
75 percent more engine protection against horsepower loss and wear1 than required by a leading industry standard, extending the life of vital components like pistons and cams. Its strong fluid film keeps metal surfaces separated while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

Protects Pistons from Low-Speed Pre-Ignition

We armed Signature Series with an advanced detergent system to protect vital engine parts like pistons and connecting rods. Most new engines feature gasoline direct-injection (GDI), often combined with a turbocharger to boost power and improve fuel economy. These new technologies pose significant challenges to motor oil, one of which is the advent of low-speed pre-ignition (LSPI). LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition. It occurs in today’s advanced engines and is much more destructive than typical pre-ignition. Signature Series provided 100 percent protection against LSPI in the engine test required by the GM dexos1® Gen 2 specification.

Protects Turbochargers

The tremendous heat and stress turbos create can cause some oils to break down and form harmful bearing deposits through a process known as turbo coking. Over time, turbos can suffer reduced performance or fail altogether. AMSOIL Signature Series Synthetic Motor Oil handles heat so well that it protects turbochargers 72 percent better than required by the GM dexos1 Gen 2 specification.4 It enables modern engines to achieve their full potential and service life. Signature Series provides the ultimate protection against extreme heat and the harmful deposits that can plague turbochargers and features the high film strength needed to guard against accelerated wear.

Maximum Cleaning Power to Battle Sludge

AMSOIL Signature Series Synthetic Motor Oil has 50 percent more detergents3 to help keep oil passages clean and promote oil circulation. Its detergent and dispersant additives are so effective, Signature Series provides 90 percent better protection against sludge5 than required by a leading industry standard.

Easier Cold-Starts

Signature Series Synthetic Motor Oil does not contain paraffins (wax) and stays fluid in temperatures as low as -58ºF. Extreme cold causes other motor oil to thicken, starving vital moving parts of lubrication, accelerating wear and even preventing vehicles from starting. Signature Series provides 66 percent better cold-temperature performance than conventional oil for easier starting, better fuel economy, improved oil flow and reduced wear.

Reserve Protection

AMSOIL Signature Series Synthetic Motor Oil provides reserve protection, allowing you to go up to 25,000 miles or one year (in normal service) between oil changes if you choose. Its unique synthetic formulation and long-drain additive system are inherently stable to resist oxidation and neutralize acids over longer periods.

Signature Series is designed to deliver outstanding engine protection, cleanliness and performance over extended drain intervals – guaranteed. It provides peace of mind so you can fit oil changes into your schedule, while also reducing vehicle maintenance and waste oil.

Limiting Oil Consumption

Signature Series has a uniform molecular structure that limits evaporation and keeps it where it’s needed most – protecting your engine. Volatility (burn-off) occurs when oil gets hot, causing lighter molecules to burn off or evaporate. Signature Series falls far below the API limit for volatility, reducing the need for frequent oil top-offs and limiting vehicle emissions.


  1. Based on independent testing in the ASTM D6891 test using 0W-20 as worst-case representation.
  2. Based on independent testing in the LSPI engine test as required for the GM dexos1 Gen 2 specification.
  3. vs. AMSOIL OE Motor Oil
  4. Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
  5. Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 test engine test for oil screen plugging as required by the API SN specification.

In all future engine technology required for the extreme miles per gallon required in gasoline engines, the oil will be the weak link (Per lubricant industry publications) but AMSOIL already surpasses next to impossible ratings.  Well any well established company can eventually get to the overbuilt quality factor AMSOIL has but will not for two reasons. #1 the stockholders won’t allow it as there is no profit there. #2 should they create an oil like ours they would have to charge at least 30% higher price due to the additives required and to keep their margins workable for the distribution chains thus pricing themselves out of the industry..
Thus the customer is left with one choice to protect these new engines – AMSOIL!

AMSOIL Expands Signature Series Line with 5W-50 Synthetic Motor Oil for Ford Mustangs

Mustang 5W-50 Motor oil from AMSOIL

AMSOIL Expands Signature Series Line with 5W-50 Synthetic Motor Oil for Ford Mustangs

What is it about the Ford Mustang that so excites the imagination? Well, for starters, consider the name. Mustang. When I think of mustangs, I think of wild horses. And when older men think of Mustangs, they think of the wild horsepower packed under the hood of that particular breed of Sixties muscle car.

Introduced in 1964 at the New York World Fair, the Mustang became an instant hit. Muscle car madness overtook the American car scene with its lust for power. The ‘Stang was Ford’s definition, competing with Camaros, GTOs, Chargers, Hemi-powered Road Runners and ‘Cudas.

A half century has passed, and Mustang-love continues undimmed by the years. For a quick overview of the various stages of Mustang history check out this Pinterest collection or this Mustang timeline.

This year at the 2014 SEMA Show the Mustang took center stage as it celebrated its 50th birthday. In conjunction with this AMSOIL has added a new viscosity to its Signature Series line specifcally formulated for high-horsepower Ford Mustang engines requiring the Ford WSS-M2C931-C performance specification.


AMSOIL Signature Series 5W-50 Synthetic Motor Oil is fortified with a robust additive package, including top-quality detergents and dispersants to help prevent sludge deposits and keep engines clean. It withstands the stress of high horsepower and heat, resisting viscosity loss due to mechanical shear and maintaining protection in metal-to-metal contact regions for maximum engine life.


Like its Sig Series siblings, AMSOIL Signature Series 5W-50 excels in extreme temperatures. It resists thermal breakdown to maintain protection in high heat and it contains no wax, allowing it to remain fluid in the low temperatures for improved oil flow and protection at startup. Signature Series 5W-50 is designed for maximum efficiency. It exhibits an extremely low volatility rate to control oil consumption and emissions.

For more information on our new oil visit this insightful page on our website.

Choosing the Right Diesel Oil

Choosing the right Diesel Oil

Choosing the Right Diesel Oil

Choosing the Right Diesel Oil

The introduction of AMSOIL Signature Series Max-Duty Synthetic Diesel Oil and Heavy-Duty Synthetic Diesel Oil brings even greater protection and performance, as well as additional viscosity options. How can you decide which oil is right for you?

Signature Series 5W-30 (DHD)

  • Newer Over-the-Road Trucks
  • Mixed Fleets

Signature Series 5W-30 is a versatile oil aimed at mixed fleets of diesel and gasoline vehicles, simplifying maintenance and lubricant inventory. Its extended-drain capability further maximizes convenience and minimizes downtime for fleet managers with busy schedules.

It is also an outstanding option for newer over-the-road trucks that come factory-filled with 10W-30 for improved fuel economy.

  • 6X more engine protection*
  • Recommended for both diesel and gasoline vehicles, simplifying maintenance and lubricant inventory
  • Excellent fuel economy
  • Outstanding cold-temperature performance
  • Extra protection for extended drain intervals


Heavy-Duty 10W-30 (ADN)

  • Newer Over-the-Road Trucks
  • Smaller Off-Road Equipment
  • Some Turbodiesel Pickups

Many newer over-the-road trucks come factory-filled with 10W-30 for improved fuel economy. Heavy-Duty 10W-30 is ideal for customers who want to maintain the improved fuel efficiency afforded by a 10W-30.

It also provides outstanding protection for smaller off-road equipment and turbodiesel pickups specifying 10W-30 (Ford** specifies 10W-30 for normal service).

  • 4X more engine protection*
  • Excellent opportunity for price-conscious customers to move up to AMSOIL quality
  • Improved fuel economy
  • Outstanding protection for OEM-recommended drain intervals


Signature Series 0W-40 (DZF)

  • Diesel-Powered Vehicles and Equipment Operating in Cold Climates

Signature Series 0W-40 is formulated specifically for applications operating in extreme cold. Most over-the-road trucks and heavy equipment are parked outside. Signature Series 0W-40 provides the ultimate cold-weather protection and performance, helping engines turn over faster and reducing start-up wear.

  • 4X better cold-temperature performance***
  • Reduces unnecessary idle time. Engines can be shut down with confidence of restart.
  • Extra protection for extended drain intervals


Signature Series 5W-40 (DEO)


Heavy-Duty 5W-40 (ADO)

  • Turbodiesel Pickups
  • Over-the-Road Trucks
  • Heavy Equipment

Signature Series 5W-40 and Heavy-Duty 5W-40 are ideal for turbodiesel-pickup, over-the-road-truck and heavy-equipment owners who want the cold-weather and fuel-economy benefits of a 5W and the protection benefits of an SAE 40.

  • Outstanding cold-cranking ability and start-up protection
  • Excellent fuel economy


Heavy-Duty 5W-40

  • 4X more engine protection*
  • Excellent opportunity for price-conscious customers to move up to AMSOIL quality
  • Outstanding protection for OEM-recommended drain intervals


Signature Series 5W-40

  • 6X more engine protection*
  • Ideal for customers seeking the ultimate wear protection in severe operating conditions
  • Extra protection for extended drain intervals


Signature Series 15W-40 (DME)


Heavy-Duty 15W-40 (ADP)

  • Over-the-Road Trucks
  • Off-Road Equipment
  • Turbodiesel Pickups

Signature Series 15W-40 and Heavy-Duty 15W-40 are the primary recommendations for most on- and off-road heavy-duty diesel applications in the marketplace; 15W-40 is the most widely used viscosity in the diesel world.

  • Reduced oil consumption
  • Outstanding shear stability, ensuring superior viscosity retention and wear protection in the most severe environments


Heavy-Duty 15W-40

  • 4X more engine protection*
  • Excellent opportunity for price-conscious customers to move up to AMSOIL quality
  • Outstanding protection for OEM-recommended drain intervals


Signature Series 15W-40

  • 6X more engine protection*
  • Ideal for customers seeking the ultimate wear protection in severe operating conditions
  • Extra protection for extended drain intervals


*than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222.

**All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

***when compared to SAE 15W-40 in ASTM D5293 Cold-Cranking Viscosity test.

Visit your local AMSOIL store at 4610 W. 12th St here in Sioux Falls or call 605-274-2580


Should I Run Multi-Weight or Straight-Weight Oil in my Muscle Car?

Should I Run Multi-Weight or Straight-Weight Oil in my Muscle Car?

Ed Newman (Edited by Ches Cain)|

Mopar Muscle

Much of the stigma related to this has been eliminated due to technology.

Here’s the straight story on viscosity grade. The “W” number in, for example, a 15W-50 motor oil outlines the viscosity requirements of the oil when it is cold. This means that a 15W-rated oil has to meet certain criteria at cold temperatures. Taking our 50-weight example, a 15W-rated oil will flow more freely than a 20W-rated oil when compared at cold temperatures.

Winter weights have always confused people. Don’t be afraid of the W!

If you have a spec that calls for a 20W-50 but all you can find is a 15W-50, don’t sweat it. That just means it will have better flow at a lower temperature. Or as I tell people, at room temperature it’s closer to its operating viscosity than a straight weight. Or a 10W-30 is closer to it’s operating viscosity (30) than a SAE-30, and a 5W-30 is closer to its operating viscosity than a 10W-30. But the “W” is not the same type of number or scale as the 2nd number. A 10W-30 is NOT a 10 weight at one temp then a 30 at another!!  the 10W, or 20W is a totaly different test measuring toque absorbed at a given temperature range. The large number calculated is converted into the range which is your 5W and 10W and so on. A 0W is not a Zero Weight oil.

Now let’s talk about the “50” portion of a 15W-50, 20W-50 and straight SAE 50. The Society of Automotive Engineers (SAE) states that a 50-weight oil must have a viscosity at 100°C above 16.3 cSt but less than 21.9 cSt and have a high-shear-rate viscosity minimum of 3.7 at 150°C. This means that a 15W-50, 20W50 and SAE 50 weight must all meet these requirements. This does not mean they respond the same but they all need to meet these requirements regardless to have the 50-weight designation. Technically a 50-weight is a 50-weight at operating temperature no matter what the W designation is.

There is a LOT of confusion with these numbers. A little research will fix that.

Against this backdrop of understanding, the question is, should you run a multi-weight or a straight weight in our example? The answer is, take a close look at the oil specifications and compare to what you want to do and pick an oil that fully meets your needs. The best question to ask is, how does the oil hold up under shear”? Shearing is the loss of oil viscosity during operation. Shear is especially a problem when running engines at high RPMs.

Now no matter the age of the engine, when you use a straight weight oil there is some risk based on the quality of the brand. Outside of the normal operating temperatures, any degree below  – lets say 75 degrees Fahrenheit, the oil will rapidly increase in viscosity. Starting an engine with a oil lacking the ability to flow as well as another also increases the likely hood to shear.  Multi-viscosity oils solve this issue. And these days, the lower the “W” test value, the more advanced the product.

Consider what determines quality at various levels

The quality of the motor oil brand determines how many cycles under stress the motor oil can withstand before sheering out to a undesired viscosity. In some of these companies, the quality of the additives is determined by the profit margins demanded by the stockholders. (AMSOIL by the way, has no stock holders.)

Typically, muscle car folks will have a tendency to run up the rpm from time to time, which can shear down the oil viscosity. Viscosity is one of the most important factors for overall engine protection. When oil viscosity at operating temperatures degrades significantly, engine protection will be compromised. On the other side of the coin, if you start and run your muscle car in colder climates, a multi-weight will definitely provide more oil flow to critical parts quicker. Remember, most engine wear on automobiles actually occurs on startup when engine oil is not flowing readily to engine components.

So there are applications for straight weight oils but automotive engines are no longer in that category. Take advantage of the reduction of stress multi-viscosity oils offer. Muscle car owners want to feel the power at the wheels and a smooth engine. You want the oil to be optimum at all temperature ranges and even after a long trip.

Viscosity selection tip: pick a multi-weight oil that has outstanding shear stability. I personally always recommend AMSOIL.  – The one motor oil with a guarantee to stay in grade!

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