Frequently Asked Questions

General Questions

What is AMSOIL? 

AMSOIL INC. is an American innovator that has specialized in synthetic lubricants since 1972, delivering solutions for automotive, powersports, industrial and racing applications. Learn more on the company page: https://www.amsoil.com/about/?zo=30557432

Why choose synthetic lubricants instead of conventional oil? 

100 % synthetic base oils are chemically engineered for cleaner operation, better wear protection and improved fuel efficiency that conventional petroleum oils cannot match. Get the full explanation here: https://www.amsoil.com/why/synthetic/?zo=30557432

What does “100 % synthetic” really mean?

AMSOIL builds its lubricants from pure, uniform molecules rather than refining crude oil, resulting in superior performance and stability. Details: https://blog.amsoil.com/100-synthetic-oil-vs-full-synthetic-oil-whats-the-difference/?zo=30557432

Product Questions

How do Signature Series, XL and OE motor oils differ?

  • Signature Series – Up to 25 000 miles/1 year under normal service; maximum wear protection.  https://www.amsoil.com/c/gasoline-motor-oil/3/?zo=30557432

  • Extended‑Life (XL) – Guaranteed up to 20 000 miles/1 year; ideal for high‑mileage commuters.

  • OE Series – Meets original‑equipment drain intervals at a competitive price.

How often should I change AMSOIL motor oil?

For passenger vehicles using Signature Series, change oil up to 25 000 miles or one year (15 000 miles for severe service) and always replace the filter at the same time. See guidelines: https://blog.amsoil.com/amsoil-oil-change-interval/?zo=30557432
Always follow the AMSOIL Product Guide and your owner’s manual for exact recommendations.

Does AMSOIL make lubricants for diesel, powersports and industrial equipment?

Yes. AMSOIL formulates dedicated oils, fluids and greases for light‑ and heavy‑duty diesel engines, motorcycles, ATVs/UTVs, marine, small engines and more. Browse categories here: https://www.amsoil.com/shop/?zo=30557432

What gear and transmission lubricants are available?

AMSOIL SEVERE GEAR Synthetic Gear Lube and a full line of automatic/manual transmission fluids provide extreme‑pressure protection and extended service life. See gear lubes: https://www.amsoil.com/c/gear-oil/25/?zo=30557432

Do you offer high‑efficiency oil filters?

AMSOIL Ea® Oil Filters deliver 99 % efficiency at 20 microns with extended capacity for longer drain intervals. Product page: https://www.amsoil.com/p/amsoil-oil-filter-eaoilfilt/?zo=30557432

Warranty & Compatibility

Will using AMSOIL void my factory warranty?

No. Under the Magnuson‑Moss Warranty Act, a manufacturer must prove an aftermarket lubricant caused the failure before denying coverage. AMSOIL products are Warranty Secure™ and backed by the AMSOIL Limited Warranty. Details: https://www.amsoil.com/about/guarantee/?zo=30557432

Can I mix AMSOIL with another brand of oil?

AMSOIL motor oils are compatible with other synthetic or conventional oils; however, mixing shortens service life and voids AMSOIL’s own limited warranty on that fill. FAQ: https://www.amsoil.com/t/faq/?zo=30557432

Product Selection & Technical Help

How do I pick the right viscosity for my engine?

Always use the viscosity recommended in your owner’s manual. Choosing a lower‑than‑required grade can reduce wear protection, while a thicker oil may impair fuel economy. Learn more: https://blog.amsoil.com/understanding-oil-viscosity/?zo=30557432

Is there a quick way to see everything my vehicle needs?

Yes. Use the free AMSOIL Product Lookup Guide to view engine, transmission, differential and coolant capacities along with recommended products in seconds. Tool: https://www.amsoil.com/guides/?zo=30557432

Do AMSOIL lubricants meet OEM specifications?

AMSOIL engineers each formulation to meet or exceed applicable industry standards (API, ILSAC, ACEA, JASO, etc.) and many OEM approvals where required. Check each product data sheet for specific claims.

Purchasing & Programs

Where can I buy AMSOIL products?

You can purchase using the AMSOIL.com site: https://www.amsoil.com/guides/?zo=30557432

What is the Preferred Customer Program?

Preferred Customers save up to 25 % on every order, earn loyalty rewards and receive exclusive promotions. Enroll here: https://www.amsoil.com/offers/pc/?zo=30557432

Maintenance & Service

Do I need to change the filter every time I change AMSOIL motor oil?

Yes. A fresh, high‑capacity filter is critical to protect your engine throughout the extended interval. AMSOIL Ea® filters are designed to match Signature Series intervals. Filter tech overview: https://blog.amsoil.com/oil-filtration-basics/?zo=30557432

Can I extend drain intervals in severe operating conditions?

Severe‑service vehicles (towing, idling, dusty environments) still benefit from AMSOIL protection, but intervals should not exceed 15 000 miles or one year for Signature Series, and shorter for other lines. See chart: https://blog.amsoil.com/amsoil-oil-change-interval/?zo=30557432

Support

How do I contact AMSOIL Technical Services?

Call (715) 399‑TECH or use the contact form on the corporate site: https://www.amsoil.com/contact/?zo=30557432.

Disclaimers

  • Follow the AMSOIL Product Lookup Guide and your equipment owner’s manual for viscosity grades, capacities and drain intervals.

  • Performance claims are based on industry‑standard or independent testing as cited by AMSOIL. Individual results may vary.

  • Warranty Secure™ applies when products are installed in compliance with AMSOIL guidelines.

Need personalized advice?

Use the contact options above or reach out directly—ProEdge Lubricants is your local Authorized AMSOIL Dealer and we are happy to help you select the ideal products for every machine you own.