AMSOIL SIGNATURE SERIES 5W-30 100% SYNTHETIC MOTOR OIL
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Advanced Protection for Modern Engines
AMSOIL Signature Series 5W-30 is purpose-built for drivers who demand the absolute best protection for their vehicles. Engineered with advanced synthetic technology, it delivers 75% more engine protection against horsepower loss and wear compared to the GM dexos1 Gen 3 test requirement1, providing an unmatched level of defense for modern engines.
Whether you drive a late-model truck, SUV, or passenger car, Signature Series 0W-20 is formulated to handle the increased stress of turbochargers, direct injection, and start-stop technology found in today's engines.
Key Benefits
- 75% more engine protection against horsepower loss and wear1
- 50% more cleaning power vs. GM dexos1 Gen 3 test2
- Excellent cold-weather starting and protection
- Advanced protection against LSPI (Low-Speed Pre-Ignition)
- Superior turbocharger protection up to 72% better than required3
- Guaranteed protection for up to 25,000 miles or 1 year
Proven Performance You Can Trust
Don't just take our word for it — AMSOIL Signature Series 5w-30 has been independently tested and proven to outperform competing oils in critical areas. From wear protection to extreme temperature performance, the data speaks for itself.
Pros and Cons
Pros
- Industry-Leading Protection: 75% more engine protection against horsepower loss and wear than required by a leading industry standard.
- Extended Drain Intervals: Guaranteed protection for up to 25,000 miles or one year, reducing oil change frequency. Extended drain intervals are safest when supported by an implemented testing program.
- Superior Cold-Start Performance: Flows easily at sub-zero temperatures to reduce engine stress during winter starts.
Cons
- Premium Investment: Higher initial cost compared to conventional or "shelf-brand" synthetic oils.
- Limited Local Retail: Primarily available through authorized dealers and specialized synthetic outlets. National Synthetics is a local stocking dealer. Call 1-678-944-8816 to confirm in-stock items for same-day local pickup.
Ready to Upgrade Your Engine Protection?
Join thousands of drivers who trust AMSOIL Signature Series for maximum engine protection. As your Independent AMSOIL Dealer (ZO #1858536), we're here to help you find the right products for your vehicle.
Independent AMSOIL Dealer #1858536
Frequently Asked Questions
AMSOIL Signature Series 5w-30 is guaranteed for up to 25,000 miles or 1 year under normal service conditions, whichever comes first. Under severe service conditions (frequent short trips, extreme temperatures, towing), change at 15,000 miles or 1 year.
Yes, AMSOIL Signature Series 5W-30 is compatible with other conventional and synthetic motor oils. However, mixing oils may reduce the performance benefits and extended drain capability. For best results, use AMSOIL Signature Series exclusively.
Click the "Shop Now" button on this page to order directly from AMSOIL.com through our Independent AMSOIL Dealer account (ZO #1858536). You'll get the best available pricing and can set up a Preferred Customer account for additional savings of up to 25%.
Customer Reviews
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I change it every year less than 25k miles and the oil viscosity still good
along for the long haul
I've been using amsoil for a couple years now. After I blew my original motor in my 2013 Dodge Ram 1500 Sport pickup. I purchased a new motor and began using Amsoil because the shop that I took my truck to for the removal and installation of new engine provided Amsoil so I said let's use the Amsoil it reminded me of home. Quite honestly watching John Gillespie fishing show is what got me interested in Amsoil he was always promoting Amsoil on his fishing show. Anywho I now reside in Tower minnesota. I'm on my fourth oil change of Amsoil oil synthetic 5w-30. The first couple of oil changes was with a 5000 mile synthetic oil. The last two oil changes have been with 25,000 Mi 5W30 oil synthetic. Honestly I change the oil at 10,000 a little over 10,000. I've noticed a little bit better fuel mileage but definitely more power in my motor so much smoother after an oil change. I will continue to use Amsoil for the life of this motor. Thank you Amsoil for a great product.
Good
Muy buenos los aceites
Great Quality
Oil has performed very well and has not burned off in highly modified 700hp M5. I have run Redline and Moly in this car and the analysis of the oil after the first change has been superior to both.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.