Extended Life 5W30 Synthetic Motor Oil

Extended Life 5W-30 Synthetic Motor Oil (XLF)

Extended Life “XL” Synthetic Motor Oils exceed the current performance requirements for gasoline engines and deliver exceptional performance by controlling wear and maximizing fuel economy. Best product for warranty concerned customers needing an API certified synthetic.


Call 800-579-0580 for competitive current price.
Or use the online preferred customer portal if you choose to order online.

Buy & Check Price& Bottle Sizes

Package sizes include:

  • 1-Quart Bottles & Cases of 12
  • 1-Gallon Bottles & Cases of 4 (popular for jobbers)
  • 30-Gallon Drum
  • 55-Gallon Drum
  • 275-Gallon Tote

Download the Data Sheet for XL Series Oils

Download PDFProduct Datasheet

Product Overview

This product (XLF) is our best seller in the XL line! Popular with installers who want to offer optimum value. It’s a premium product at a fair price.

AMSOIL XL Extended Life Synthetic Motor Oils provide better wear control, high- and low-temperature protection and increased fuel economy compared to conventional oils. Formulated with extended-drain boost technology, AMSOIL XL Synthetic Motor Oils provide superior performance for up to 20,000 miles or one year.


Resists Oil Breakdown

XL 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.

GN Oxidation and deposit test

Protects Pistons from Low-Speed Pre-Ignition

AMSOIL Extended-Life Synthetic Motor Oil features unique chemistry 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-injection (GDI), often coupled with a turbocharger. These technologies heighten the possibility of LSPI events, which can destroy pistons and connecting rods. AMSOIL Extended-Life Synthetic Motor Oil is formulated to guard your engine from 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

Extended-Life Synthetic Motor Oil is fortified with a boosted additive package that neutralizes acids and resists sludge, corrosion and carbon deposits. The extra protection built into Extended-Life Motor Oil provides peace of mind knowing your vehicle is getting premium protection and the convenience of extended drains.

Reduces Maintenance


  • Outstanding protection benefits motorists, business owners and fleet managers.
  • Extended-drain intervals reduce expensive, time-consuming and inconvenient oil changes.
  • Extended drain intervals up to 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.

Maximizes Fuel Economy & Maintains Low Emissions

XL Synthetic Motor Oil is licenced 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” designation5 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.



Match Your VehicleProduct Guides

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

5W-30 (XLF)

  • 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 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 recommended for use with AMSOIL XL Synthetic Motor Oil.


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.

  • Modified engines (non-stock), racing vehicles and vehicles using alternative fuels (E85, CNG, propane, etc.) are excluded from extended
    drain interval recommendations.
  • Change at the vehicle manufacturer’s recommended drain interval outside U.S. and Canada.
  • AMSOIL Oil Filters are designed for extended drain intervals. Do not exceed 12,000 miles (20,000 km) or one year with other brand filters unless longer intervals are recommended by the vehicle manufacturer. Always change filter when changing oil.
  • Check oil regularly to maintain proper fill levels. AMSOIL Oil Filters stop smaller particles, flow more oil and last longer than regular filters. For best performance, use AMSOIL Oil Filters.


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 www.amsoil.com/warranty.aspx.


Health and Safety

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 www.amsoil.com or upon request at 715-392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.

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Extended Life Reviews

Works good

By  Forrest ,  a  Verified Buyer  from  PA  on  January 19, 2024
I am using this in a higher mileage Honda. 6 cylinder. My oil consumption has went down significantly between changes.


By  CHUCK,  a  Verified Buyer  from  West Tn.  on  January 13, 2024
This oil is of course is the best. Been using it for years, no problems. I do believe you gain horsepower by using this !! Great oil !!
Editors note: Yes it does  – Horsepower gain is noticed by the majority of our customers and proven on dyno tests.

Great product. Trusted for decades

By  Chuck,  a  Verified Buyer  from  Pa  on  January 05, 2024
I’ve used Amsoil products for decades with complete confidence and great results. My current vehicles have 206,000 miles, 166,000 miles and 101,000 miles. Never any internal engine problems. All running great. I also use Amsoil (Z-Rod) in my fourth vehicle, a ’47 Hudson and all my boats and mowers.

Loyal AMSOIL Customer

By  DANNY,  a  Verified Buyer  from  Alabama  on  December 18, 2023
This is the only oil I will run in my 2016 Jeep JKU. I bought it with right at 30k on the odometer and immediately switched it to AMSOIL. According to its maintenance records it was serviced exclusively at a CDRJ dealership, but I do all my maintenance and wanted to run AMSOIL. The JK ran smoothly before, but when I switched to the AMSOIL it was noticeably smoother and quieter. The same was true for every vehicle I switched over to AMSOIL. If you’re on the fence, give it a try! I seriously doubt you’ll switch back to whatever oil you were running before.

Utmost incredible customer service!

By  KRIS,  a  Verified Buyer  from  Michigan  on  December 13, 2023
I ordered an oil change kit that arrived short of two quarts of oil. I sent an email to customer service and within just an hour or two I had a response stating the two quarts would be shipped out within 24 hours. With all of the supply chain, logistics, and labor shortages these days, I think that was spectacular service.

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.

Excellent Motor Oil

By  BRIAN H.,  a  Verified Buyer  from  Whitehall, NY  on  October 05, 2023
I have this oil in my wife’s car, and I have the XL Boosted in my car(Mine is turbocharged). They both have performed well so far. My turbocharged car runs quieter with this oil. When you ask for power, it doesn’t “Rumble” like it use to. Excellent job Amsoil!! Keep up the good work.