AMSOIL product guide
AMSOIL Extended-Life Motor Oil
Looking for AMSOIL XL? Explore the current Extended-Life range and build a service plan that fits how you drive.
Trey Campo · Independent AMSOIL Dealer #5573391 | Spokane, Washington · Personal product guidance
Fewer scheduled oil changes—when your application qualifies.
Extended-Life combines synthetic base oils with an additive package designed for engine cleanliness and resistance to oil breakdown. Current corporate product pages use the Extended-Life name; the familiar XL product codes remain.
What interval applies to me?
- Normal service: up to 20,000 miles or one year in qualifying personal vehicles.
- Severe service: up to 12,000 miles or one year. Commercial/fleet use, excessive idling and frequent towing, hauling, plowing or dusty driving qualify.
Use whichever limit comes first. Modified engines, racing and alternative-fuel vehicles are excluded from extended intervals. Outside the U.S. and Canada, follow the vehicle maker’s schedule.
With another brand’s filter, do not exceed 12,000 miles or one year unless the vehicle manufacturer specifies longer. Change the filter with the oil, check the oil level regularly and read the complete current data sheet before extending service. AMSOIL does not support extended intervals when oils are mixed.
Choose your product
Match the grade and application, then open the exact product page for current specifications, package choices and ordering.
AMSOIL Extended-Life 0W-20 100% Synthetic Motor Oil
XLZ · Select 0W-20 only when it matches your vehicle’s requirements. Check the current application list for your exact engine before ordering.
AMSOIL Extended-Life 5W-20 100% Synthetic Motor Oil
XLM · Select 5W-20 only when it matches your vehicle’s requirements. Check the current application list for your exact engine before ordering.
AMSOIL Extended-Life 5W-30 100% Synthetic Motor Oil
XLF · Select 5W-30 only when it matches your vehicle’s requirements. Check the current application list for your exact engine before ordering.
AMSOIL Extended-Life 10W-30 100% Synthetic Motor Oil
XLT · Select 10W-30 only when it matches your vehicle’s requirements. Check the current application list for your exact engine before ordering.
AMSOIL Extended-Life 10W-40 100% Synthetic Motor Oil
XLO · Select 10W-40 only when it matches your vehicle’s requirements. Check the current application list for your exact engine before ordering.
Clear answers before you order
Can every vehicle go 20,000 miles?
No. That is a conditional normal-service limit, not a universal oil-change interval. Your usage, engine, filter and the product instructions determine the plan.
What if I prefer my factory oil-change schedule?
You can choose a suitable oil and continue that schedule. OE motor oil is another option designed around manufacturer-recommended intervals.
Should my work vehicle follow normal-service limits?
Commercial and fleet operation is severe service under the Extended-Life guidance. Review commercial account options and tell me how your equipment is used.
Reviewed October 25, 2026 by Trey Campo. Product recommendations and availability can change. Current Extended-Life range · Complete service instructions
Make your next service easier.
I used AMSOIL in my personal vehicles, equipment and commercial lawn-care equipment for more than 10 years before becoming a dealer. Tell me what you operate and I’ll help you find the right starting point.