AMSOIL Extended Life XL 5W-30 Synthetic Motor Oil

XL 5W-30 best selling 100% Synthetic by AMSOIL

Extended Life 5W-30 Synthetic Motor Oil Formulated for up to 20,000-miles outperforming more expensive synthetics found locally.

SKU: XLF Category:

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AMSOIL XL 10W-30 Extended Life 100% Synthetic Motor Oil is designed to provide better wear control, improved high- and low-temperature protection and increased fuel economy compared other top tiered (so called) synthetic but at a better price. AMSOIL XL Synthetic Motor Oil is formulated with extended-drain boost technology. It provides superior performance for up to 12,000-miles or 1-year, whichever comes first. It’s pretty fricken awesome!

“It’s a real bargain – longer life – and better performance than all big name top-tiered synthetics yet the XL costs less.” – Ches Cain


XL 5W-30 Synthetic Motor Oil

Now good up to 20,000 or 1-year. Still better than most shelf synthetics for a better price.

Built to compete on Price – Resists Oil Breakdown

XL Extended Life 5W-30 SyntheticXL Synthetic Motor Oil maintains its fluidity (viscosity) under the most extreme conditions. Some oils break down and significantly increase in viscosity after extended periods of high-temperature operation. These changes can cause excessive oil consumption, engine deposits, accelerated wear and difficult cold-starts. The GM Oxidation and Deposit (GMOD) Test consists of a 5.7L V8 engine running at 293ºF (100º hotter than normal) for 100 hours. These severe operating conditions test an oils ability to control viscosity increase, deposits and oil consumption. The testing revealed that AMSOIL XL Synthetic Motor Oil provides 64 percent more protection against oil breakdown1 than required by the GM dexos1® Gen 2 specification, ensuring protection in extreme temperatures.

Download Product Data Bulletin

Protects Pistons from Low-Speed Pre-Ignition – A major problem in todays engines

XL Synthetic Motor Oil features unique chemistry proven to protect your engine against the harmful effects of low-speed pre-ignition (LSPI). LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition. Most new engines feature gasoline direct-inject (GDI), often coupled with a turbocharger. These technologies heighten the possibility of LSPI events, which can destroy pistons and connecting rods. A properly formulated motor oil is critical for protecting your engine against LSPI.

Original equipment manufacturers (OEMs) like GM have addressed the issue by designing tests to determine a motor oil’s ability to prevent LSPI. XL Synthetic Motor Oil achieved 100 percent protection against LSPI2 – zero occurrences were recorded throughout five consecutive tests.

Keeps Engines Clean – XL Boosted 5W-30

AMSOIL XL Synthetic Motor Oil is fortified with higher quality detergent and dispersant additives rarely used in the industry due to cost. Its boosted additive package effectively raises the total base number (TBN) to neutralize acids and resist sludge, corrosion and carbon deposits. XL provides 37 percent more cleaning power than AMSOIL OE just to mention – to help keep your engine running smoother, longer.

This is what the “Boosted” on the label is referring to. Boosted ability to keep the engine clean. Strangely many “full” synthetics on the market still cost more than our XL Boosted.

Extended Life “XL” 5W-30 Reduces Maintenance

Motorists, business owners and fleet managers benefit from the boosted engine protection of AMSOIL XL Synthetic Motor Oil. Frequent oil changes are expensive, time-consuming and inconvenient. The extra protection built into XL can provide extended drain intervals up t0 20,000 miles or one year, if you choose, allowing you to change oil on your schedule, reduce maintenance, save money and reduce waste oil.

  • Boosted additive package effectively neutralizes acids and resists sludge, corrosion and carbon deposits.

XL 5W-30 Synthetic Maximizes Fuel Economy & Maintains Low Emissions

Amsoil’s XL Synthetic Motor Oil is licensed by the American Petroleum Institute (API) to meet and exceed the requirements commonly found in owner’s manuals. It excels in fuel-economy testing, earning the additional “Resource Conserving” designation from the API. XL is also friendly toward modern emissions control systems, promoting proper operation of catalytic converters for optimum service life and low exhaust emissions.

XL 5W-30 Applications and Specifications

Use AMSOIL XL Synthetic Motor Oil in applications that require any of the following specifications:

API SP (Resource Conserving), SN Plus, SN…; ILSAC GF-6A, GF-5, GF-4…; GM dexos1* Gen 3 (supersedes dexos1 Gen 2, 4718M, 6094M,
LL-A-025); ACEA A1/B1, A5/B5; Chrysler MS-6395; Ford WSS-M2C929-A, WSS-M2C946-A, WSS-M2C946-B1, WSS-M2C961-A1; Honda HTO-06

Amsoil XL Boosted Compatibility

AMSOIL XL Synthetic Motor Oil is compatible with conventional and other synthetic motor oils. Mixing other oils with AMSOIL motor oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives are not smart and recommended for use with AMSOIL XL Synthetic Motor Oil.


For immediate answers to your technical questions call (715) 399-TECH (8324) between 8 a.m. and 5 p.m. Central time or email


Normal Service – Up to 20,000 miles (32,000 km) or one year, whichever comes first, in personal vehicles not operating under severe service.

Severe Service – Up to 12,000 miles (20,000 km) or one year, whichever comes first. Severe service conditions include commercial or fleet vehicles; excessive idling; or frequent towing, hauling, plowing or driving in dusty conditions


Using AMSOIL synthetic lubricants or practicing extended drain intervals does not void your new vehicle or equipment manufacturer’s warranty. All AMSOIL products are backed by a Limited Liability Warranty. For complete information visit AMSOIL Warranty Information.


This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at or upon request at 715-392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.

*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.

Amsoil XL Reviews

Great oil

By  RICHARD,  a  Verified Buyer  on  December 11, 2023
This is wonderful oil. And with the price of oil at the stores right around the same price, it actually puts money in your pocket and the promise of great oil. This is the only oil I’ve used for almost 20 years.

Outstanding product

By  CHRIS,  a  Verified Buyer  from  Orangeville   on  October 31, 2023
Been using Amsoil products in both my truck and small SUV now for just over a year, so I’m still new to the game to give solid information. What I have seen over the year is a quieter engine in my 130k + SUV and a slight savings in fuel in my truck with proper maintenance and oil change intervals. It’s a little pricey over other brands but the quality and noticeable difference justifies the price IMO, plus if you opt for a membership you save on each purchase. Amazing product…. 5 stars!

Love this company & it’s products!!

By  PHILLIP,  a  Verified Buyer  from  Kingman, AZ  on  June 03, 2023
This oil is head & shoulders above regular oils. My car blew the top radiator hose far from civilization and the engine heated to 300 degrees and suffered no damage i can detect.

The best oil ever!!

By  NORMAN,  a  Verified Buyer  from  Rhode Island   on  April 23, 2023
Love the boosted formula i drive a 2011 Silverado with a 159,000 on it. I change the oil every 4500 to 5000 the viscosity breakdown is awesome it’s still pretty clean when I drain it. I would highly recommend it if you haven’t tried it!!

5 liter F-150

By  Les,  a  Verified Buyer  from  Colorado  on  April 18, 2023
Been using this in my 2014 F-150 since it was new. Approaching 100,000 miles with no issues with this engine or transmission.

Amsoil always outperforms

By  ERIK,  a  Verified Buyer  from  Florida   on  April 15, 2023
We had to do an engine swap and bought generic oil after install to test it out. Once it was driven a while we put in amsoil and the oil pressure increased significantly. That’s why all of our equipment from compressors to trucks only gets amsoil. They are unmatched in every field.

Smooth running

By  ANDREW,  a  Verified Buyer  from  Arnprior, Ontario, Canada  on  May 18, 2023
After changing the engine oil to Amsoil synthetic the engine seems to run smoother and is more responsive

Product is the best on market!

By  WILBERT,  a  Verified Buyer  on  May 04, 2023
I would highly recommend this product along with all many of the others. Have been using Amsoil for years after getting excellent to perfect outcomes.

AMSOIL quality-control measures are thorough and extensive.

Other companies might tout their quality-control practices, but few approach the AMSOIL standard.

Dan Peterson - Vice President AMSOIL Technical Development

Dan Peterson

When visitors tour AMSOIL headquarters in Superior, Wis., they frequently comment on the cleanliness of the facilities. Whether you walk around the offices, distribution center or the blending and packaging areas, everything is tidy and organized. That’s no accident, but the result of determined effort and an unwavering commitment to quality control.

Quality control is an exacting, step-by- step process that ensures every AMSOIL product is consistently blended, consistently formulated, consistently packaged and consistently tested before a Dealer or customer makes a purchase. Many companies tout quality control, but few do it like AMSOIL. Everything AMSOIL does – from receiving raw materials and warehousing to packaging and shipping – is governed by clearly defined quality-control procedures. The first line of the AMSOIL Quality Policy states, “It is the policy of AMSOIL INC. to provide products with ‘exceptional performance’ that exceed customer expectations.” Doing so requires exceptional employee performance and exceptional work practices.

AMSOIL operates an advanced blending operation with access to a wide range of raw materials handled by the 2.5 million gallons of storage tank capacity on site. You probably know that AMSOIL uses the best base stocks and additives available to formulate the best lubricants possible. But that’s just one of many quality control steps taken here. Did you know that every drum, tanker truck and railroad car of raw materials AMSOIL receives is tagged and held in quarantine until it can be tested in our laboratory? Only after the material is tested to verify it meets specifications can it be transferred into the tanks and production chain.

Lubricant blending is a meticulous activity achieved by employees following explicit work instructions and aided by ultramodern equipment. Our state-of-the-art simultaneous metered blending system (SMB) affords maximum control and efficiency over the blending process and ensures that each product receives precisely formulated amounts of base oils and additives required for optimum performance. The blending process also ensures that all fluids are carefully tested numerous times in the laboratory before being labeled as AMSOIL products. After the final lab approval fluids enter the packaging stage, but the show must go on. Between runs, the lines are cleaned thoroughly with a squeegee-like device called a “pig” that makes two complete passes through the pipes to remove any residue leftover from the prior batch. This guarantees that the next fluid traveling the line has a clean environment and that cross-contamination does not occur.

Every truckload of bottles that AMSOIL receives also must pass inspection, with random bottles being examined and weighed for consistency before entering production. And before lubricants are dispensed into their packages they are filtered according to industry specifications using appropriate synthetic media for the respective product. Bottles are filled to define weights and capped to a consistent torque. As bottles proceed through production, an inline scale identifies and removes any containers failing to meet specified weight requirements. They also pass a camera that inspects every bottle for crooked or loose caps. If an improperly capped bottle is discovered, the optical system sends a flashing signal notifying a line worker of the problem, who can then recap it and ensure a proper seal. Every bottle is also coded with several pieces of information, including date and time of production, which line it ran on and who was responsible for the line at that time. Such data not only provides transparency, it allows for back-referencing should a problem arise later. Even our labels go through a quality process, with all labels containing a Certificate of Analysis (COA) that guarantees their accuracy before they stamp a container.

We began this article talking about clean facilities. AMSOIL Production Manager Bill Archibald notes, “We keep the blending and production areas clean by instilling the importance of cleanliness in every employee.” Clean facilities are the result of continuous and ongoing effort. If a spill occurs, it is cleaned immediately – not later, not at the end of the day, but now.

These are just a few examples of our multi-faceted approach to quality control. Going the extra mile benefits customers and Dealers alike; both can purchase, use and recommend AMSOIL products without hesitation, knowing that quality raw materials and quality procedures yield quality products.

Editors note:
The XL line of oils are no exception. The 5W-30 if made by a competitor using the level of additives and base stock selection, would be marked up at least 20% more. Always look to AMSOIL for the best value no matter which product tier you select from. The XL Synthetic line gains attention of drivers because of the quality of additives. Yes – an oil which truly makes a difference!

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