AMSOIL 5W-30 Signature Series 100% Synthetic
Our most popular AMSOIL sold in Omaha
Editor’s note:
Nothing is held back in the additive blend for this and other Signature Series products. This is why it’s the best in the industry. I’ll quote AMSOIL’s Vice President Dean Alexander, “When selecting additives and base stocks we are the only company who avoids making decisions based on cost. If there is a better product or a trend for something better AMSOIL is known in our industry to be the first to get it to the consumer with our legendary blending experience. That is our business, the business of being the best, not turning profits for share holders.”
You can also see this technique being used in the Absolute Efficiency Oil Filters.
Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.
• 50% more cleaning power vs. AMSOIL OE Motor Oil
• Ideal for turbos & direct injection
• Guaranteed protection for up to 25,000 miles or 1 year
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Protects Against Engine Wear
AMSOIL Signature Series Synthetic Motor Oil develops a strong fluid film that keeps metal surfaces separated while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. The Sequence IVA Engine Test, which must be passed to meet the industry-standard API SN specification, simulates extended periods of stop-and-go driving. For 100 hours, the test engine cycles between 50 minutes of idling and 10 minutes of elevated rpm – conditions that encourage engine wear. The camshaft is then measured for wear in 84 locations and an average score is determined. We used Signature Series 0W-20, the lightest viscosity in the line, to further increase the severity of the test. AMSOIL Signature Series Synthetic Motor Oil provided 75 percent more engine protection against horsepower loss and wear1 than required by the industry standard, extending the life of vital components like pistons and cams.
Printable Updated Data Sheet on the Signature Series lineup
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Protects Pistons from Low-Speed Pre-Ignition
We armed Signature Series with an
advanced detergent system that protects against harmful deposits and low speed
pre-ignition (LSPI). Most new engines feature gasoline direct injection (GDI), often
combined with a turbocharger to boost power and improve fuel economy. These new
technologies, when combined with a poorly formulated motor oil, promote LSPI and threaten
engine operation. 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.
Original equipment manufacturers (OEMs) like GM* have
addressed the issue by designing tests to determine a motor oil’s ability to prevent
LSPI. The GM test allows up to five LSPI events to receive a passing score.
Signature Series Synthetic Motor Oil provided 100 percent protection against LSPI1 –
zero occurrences were recorded.
Protects Turbochargers
Our unique synthetic formulation is inherently stable to resist oxidation and neutralize acids. Signature Series Motor Oil provides outstanding protection against deposits common to high-temperature engine environments. 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.
We challenged Signature Series to the GM Turbo Coking Test, which consists of 2000 cycles of extreme heat soaks. An oil must limit the temperature change within the turbocharger to 13 percent or less to pass the test. Signature Series limited the temperature increase to only 3.6 percent, protecting the turbocharger 72 percent better than required2 by the GM dexos1® Gen 2 specification.
Extends Drains: Protection Guaranteed
AMSOIL Signature Series Synthetic Motor Oil provides reserve protection, allowing you to go longer between oil changes if you choose – up to 25,000 miles, 700 hours of operation or one year, whichever comes first*. Our 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.
1 Based on independent testing of AMSOIL Signature Series 5w-30 motor oil, in the LSPI engine test as required for the GM dexos 1® Gen 2 specification.
2 Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
3 vs. AMSOIL OE Motor Oil
4 Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.
* 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.
Preserves Horsepower
The extreme durability of Signature Series 100% Synthetic 5W-30 Motor Oil ensures your engine runs stronger, for longer. We installed Signature Series 5W-30 Synthetic Motor Oil in a Ford* F-150 with a new 3.5L Ecoboost engine to test its ability to protect turbocharged direct-injection (TDGI) engines from torque and horsepower loss during extended drain intervals up to 25,000 miles. Power sweeps were done at the beginning and end of the test to evaluate horsepower and torque retention. As the graph shows, Signature Series helped maintain engine performance throughout the 100,000 mile test.
Limits Oil Consumption
Signature Series 5W-30 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. This leads to oil thickening, additive imbalance, higher emissions and oil consumption. The NOACK Volatility test is the industry standard for evaluating motor oil high temperature evaporation. It measures the percentage of burn-off after a motor oil is placed under constant airflow at 482ºF for 1 hour. A lower number indicates a better resistance to evaporation. Signature Series falls far below the API limit for volatility, reducing the need for frequent oil top-offs and limiting vehicle emissions.
Easier Cold-Starts
Signature Series Synthetic Motor Oil does not contain paraffins (wax) and stays fluid in temperatures of -58ºF and lower. Extreme cold causes other motor oils 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 for easier starting, better fuel economy, improved oil flow (as seen below) and reduced wear.
Maintains Protective Viscosity
We formulated Signature Series with superior thermal durability that resists breakdown better than conventional and synthetic motor oils. The Sequence IIIH Test uses the Chrysler 3.6L Pentastar engine to evaluate a motor oil’s ability to resist the damaging effects of heat. The test is conducted with oil temperatures of 304ºF, 100ºF hotter than normal operation, to accelerate oil thickening and deposits. Despite the extreme conditions, Signature Series kept pistons clean and held thickening to only 6 percent, a minimal amount compared to the proposed specification limit of 150 percent.1 This stay-in-grade performance helps maintain maximum power and fuel economy while also ensuring advanced technologies like variable valve timing (VVT) operate as designed throughout the entire drain interval.
1 Based on proposed ILSAC GF-5 Plus specification.
* 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.
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AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit AMSOIL Warranty Information.
Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.
Always available at our Omaha location 4211 S. 84th St! Right across from the QT Gas station!
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Signature Series 5W-30 Customer Comments:
Best oil I have ever used!!
By DAVE, a Verified Buyer from Windsor, Canada on November 30, 2024
Best Oil
Swapping to Amsoil
Exceptional Products
Been using AMSOIL since 1978
Lowest engine noise
The Best Lifeblood for your Vehicle!
By Stephen 12/21/2016
I use Amsoil 5W30 Signature Series in all 3 of my vehicles. After using the 10W40 in my motorcycle and watching the “White Papers” comparative study on 5W30 motor oils done by a reputable 3rd party test lab I was convinced that this was the best oil on the market. And they don’t have other product lines to fall back on if sales don’t demonstrate it is a quality product. The “White Papers” comparative study results really says it all. I am an Amsoil customer for life and have also convinced a family member who also happens to drive one of the vehicles in our family that you cannot lose but only win with Amsoil. He is sold on it too!
500,000 Toyota is Another Example of AMSOIL’s Superiority
We have customers all over North America with the same results! Omaha vehicles and work engines are starting to realize the hidden secrete right here on our shelves.
Fraser is a satisfied long-term PC who uses AMSOIL lubricants in all of his vehicles and equipment.
Preferred Customer Brock Fraser of Las Vegas counts on his 1998 Toyota Tacoma to keep his business on the road.
“This is a pickup I use primarily for work,” Fraser said. “I own a commercial printing and mailing operation. Frequently, I make runs to Phoenix and Los Angeles (600-mile round-trip runs each) to pick up loads of printed material to bring back to customers in Las Vegas.”
The truck, with its six-cylinder engine, and five-speed tranny, is a workhorse that consistently hauls heavy loads through hilly territory, he said. It had 70,000 miles on the engine when he bought it in late 2005. The odometer recently turned over to 508,000 miles.
Fraser first learned about the qualities of AMSOIL lubricants from a chemist friend. “(He) did a bunch of research and was telling me how highly he thought of AMSOIL,” Fraser said. “That is all it took for me to become a fan. That had to be a good 15 years ago.”
Fraser installed AMSOIL Signature Series Motor Oil when he first bought the truck.
“I have always maintained oil change intervals of 25,000 miles with filter changes at 8,300 miles and 16,700 miles using EA15K51 filters,” Fraser said.
Every 100,000 miles he services the transmission and differentials with AMSOIL 80W-90 Synthetic Gear Lube. “The transmission has never been opened up and performs flawlessly,” Fraser said. “This engine has never been opened up. The heads are bolted in place as they came from the factory. The bottom pan has never been removed. She passes smog every year without fail and uses very little oil between changes.”
He is a satisfied Preferred Customer, he said, and now installs AMSOIL products in his lawn mower, his ‘86 Mercedes Benz 560 SL and his 2002 Toyota 4Runner.