AMSOIL Knowledge Center
Expert insights on synthetic oil, engine protection, and vehicle maintenance. Learn how AMSOIL's premium synthetic lubricants deliver superior performance and cost savings.
Discover the true cost savings of AMSOIL synthetic oil with extended drain intervals. Our comprehensive analysis shows how 25,000-mile oil changes can save you hundreds of dollars annually compared to conventional 3,000-mile intervals.
Learn the truth about synthetic oil change intervals. AMSOIL Signature Series offers up to 25,000 miles or one year between oil changes - but is it safe for your engine? We break down the science and testing behind extended drain intervals.
Diesel engines demand superior protection. Discover which AMSOIL products deliver maximum performance for your diesel truck, from Signature Series Max-Duty to specialized fuel additives that improve MPG and reduce emissions.
How can AMSOIL Signature Series last 25,000 miles when conventional oil needs changing every 3,000? We explain the advanced synthetic technology, rigorous testing, and real-world proof that makes extended drain intervals possible.