AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil
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Premium Protection for 10W-30 Applications
AMSOIL Signature Series 10W-30 delivers 75% more engine protection and features the lowest NOACK volatility in the Signature Series lineup at just 4.1%, meaning minimal oil consumption even under extreme conditions.
Key Benefits
- 75% more engine protection against horsepower loss and wear
- Lowest NOACK volatility (4.1%) — minimal oil consumption
- Guaranteed protection for up to 25,000 miles or 1 year
- 50% more cleaning power vs. GM dexos1 Gen 3 test
- Highest flash point in lineup at 230°C (446°F)
- Advanced protection against LSPI
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 10.0 |
| Kinematic Viscosity @ 40°C, cSt | 62.3 |
| Viscosity Index | 147 |
| Cold-Crank Viscosity | 4,278 cP (-25°C) |
| HTHS Viscosity, cP | 3.11 |
| Flash Point | 230°C (446°F) |
| Fire Point | 256°C (492°F) |
| Pour Point | -47°C (-52°F) |
| NOACK Volatility, % weight loss | 4.1% |
| Total Base Number (TBN) | 12.5 |
Industry Certifications & OEM Approvals
API
- SP (Resource Conserving)
ILSAC
- GF-6A
Ford
- WSS-M2C205-A
Chrysler
- MS-6395
GM
- LL-A-025, 6094M, 4718M
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.
Get AMSOIL Signature Series 10W-30 100% Synthetic Motor Oil Today
Order directly through Havasu Synthetics for Preferred Customer pricing and fast shipping.
SHOW MY PRICEIndependent AMSOIL Dealer #30576570
Frequently Asked Questions
10W-30 is commonly used in older domestic vehicles, classic cars, and some trucks. It provides a thicker oil film for engines with looser tolerances. Check your owner's manual to confirm.
The 10W-30 formulation uses heavier base stocks that resist evaporation. With just 4.1% NOACK volatility, it means less oil is lost to evaporation during high-temperature operation, reducing oil consumption between changes.
Customer Reviews
See all 6,712 reviewsBest fully synthetic made
I’m running a 2019 Sierra with the 6.2L. My truck isn’t in the recall range, but I still want to have the best oil in it. And my employer pays for my oil changes. I don’t like what I’m reading about the manufacturer’s reasons for using 0W-20/40 in these engines (gas mileage). So I’m using a thicker oil. I’m seeing zero difference in mileage since I switched to this oil, which is good.
For Added Protection
Have been running the Signature Series 5W-20 in my son's 2015 F150 with the 5.0 Coyote since we purchased it last year with 148,000 miles. Ran the AMSOIL Engine Flush for 15 minutes before our first oil change with AMSOIL because I want the best protection. Seems to run quieter and hope to get another 150K miles, running all fluids on AMSOIL... Signature Series Engine Oil, Signature ATF, Severe Gear for Differentials, Signature ATF for Transfer Case, P.I. Performance Improver every 4K miles, Upper Cylinder Lubricant, Dominator Coolant Boost
Highly Recommend.!!
AMSOIL stands out for its quality and reliability. It’s a premium product that delivers exactly what it promises. If you want better engine protection and longer oil life, I highly recommend AMSOIL.
One of the best oils made
My engine sounds fantastic when this oil is in it and the metal parts per million are very low after an oil change using this oil.
Amazing, great oil!! 👍
Amsoil is the best synthetic oil out there. Less resistance, car drives faster now too!! Highly recommended oil to get!!!!
Only AMSOIL
Been running AMSOIL for years Best out there.
Mr cheapo
The original synthetic is still the best. My 2011 Focus has 3000,000 miles. Does not use any none zilch zip nadda oil. I will never use any other brand at sny price.
Amsoil signature series 100%synthetic motor oil
I have been using Amsoil signature series synthetic oil since 2005. Best synthetic oil I have ever put in any of my engines.
Best protection
Only oil I use in my 2021 blazer 3.6, great protection definitely recommend it!!!!
Great product
Used this product since the van was new. 210,000 miles later still doesn’t use a drop of oil between oil changes.
synthetic oil
I'm a 50 year technician and my entire carrier has been to do the best repairs for my customers. A very good oil is pertinent to a good repair. AMZOIL does that for me and my customers.
Fountain of youth 4 cars
More power, better gas mileage, smoother running engine it sounds like and feels like it doesn't have to work so hard to get the same power as before. I'm homeless so I idle my car a lot summer/winter since I idle much more than a taxi cab or police officer remember I live out of my car year round I might go with 5w40 next time instead of factory recommended 5w30 this oil ain't no joke!!! 2005 Toyota Solara V6 SLE
My 17 year old engine has never run quieter or smoother
My 17 year old engine has never run quieter or smoother
Noticeable results in performance
I've been a royal purple guy for 20 years. I was doing some research and decided to change to Amsoil. I've seen a noticeable difference in engine performance and better fuel economy. I would highly recommend this oil.
100k plus miles
From it first oil change I have used Amsoil 5w20 and to this day runs like new. In fact all my engine run in Amsoil products. Very happy with the performance and durability it keeps giving.
Amsoil is superior.
A number of years ago I learned that synthetic oil was superior to conventional oil. Shortly thereafter I tried amsoil and discovered that amsoil was superior to other synthetic oils. This became evident when I started traveling on 2250 mile trips on a fairly regular basis. Other synthetics needed a quart on the trip. Amsoil, none. I researched the issue and a competitor alleged that the difference was based upon Amsoil's use of too much of a certain additive and that that additive would ruin a catalytic converter. I have put over 150,000 miles on three different vehicles and none ever needed a catalytic converter or oxygen sensor.
Amzoil is # 1
I've been using Amzoil products in all of my vehicles since 1988.
I will only buy this prouduct. Best money can buy!
Protects at higher levels than the competition and is great in cold weather start ups.
Amsoil works!
This is the second time I have filled my 2012 Toyota Tundra Crew with 0W-20 synthetic. Even though it takes 2 full gallons for a fill up its well worth the time and cost. This oil only has to be changed out once a year or within an extended driving distance, or hard service. My Tundra does see off road quite often and I've never had a worry about over heating or an other oil related issues. With a long life oil filter and air filter changed at the same time, I only have to change fluids once a year. That's awesome, as I travel quite often as a wounded Veteran, going to WWP events and also using my truck for Team Rubicon disaster relief efforts. The sticker on the window gets the word out, the truck running flawlessly is all the proof I need. I'll keep using it as long as you guys keep making a great product. Thanks SGT. Eric DeGroot (U.S. Army Retired)
Improved gas mileage
I have used this oil in my 2008 Toyota Prius since November 2015. There was a noticeable improvement in gas mileage. I consistently get 52 to 54 MPG. My Prius has 183.000 miles and it runs better than new. It does have higher oil consumption than when I used petroleum based oil, but it hasn't impacted the performance. It should help the engine last a long time.
Great oil for the long haul.
I use it in 2008 Taurus and a 2015 Ford Explorer. I've used it in the Taurus since 3000 miles and it now has 115,000 miles on it and have had no engine issues and still get 22 - 25 mpg. I bought the Explorer new and have used it since the first oil change and it now has 41000 miles on it. Love the oil ! I would recommend it to anyone looking for a high quality Synthetic motor oil.
Long Time User
I use AMSOIL 10-30 Signature in 3 vehicles,,and have an AMSOIL user for over 25 years. I use 10-30 Signature in all 3 vehicles,and AMSOIL Diesel oil in my daughters Class A motor home
Best oil in the world~
I have been an Amsoil customer/member for over a decade. This is probably one of my favorite companies around. Thank you for an excellent product and customer service. Oil & full-flow EaO filters keep my vehicles in tip-top shape year in and year out. I even go as far as testing the motor oil through an independent lab, the results are top-notch wear and tear. Without reservation, Amsoil is hands-down second to NONE!
I wont buy anything else.
I use Amsoil in all of my cars and they see a good amount of abuse from track days and autocross. Amsoil keeps my cars going strong. Proven to last longer and it does. Worth the money up front because you'll spend less in the long run.
Best oil I have ever used in my vehicles
your procuct is superior but getting it where I live is a problem. 1. My order is processed in Edmonton and delivered into the Castlegar Loomis for delivery overnight. 2. It then sits at the Castlegar Loomis for a week. You cannot even drive out there to pick it up as the operater of that Loomis is open only from 3:00 P.M. - 4:30 P.M. and even then he may not be there 3. I think there is a dealer in Creston which delivers next day to Trail. 4. I will not order your product if it is sent to the Loomis Depot in Castlegar again. 5. I will order from the US side and import it myself. 4. I will not purchase any product which is delivered by the Loomis Depot in Castlegar
2014 Audi 3.0l TDI
Still clatters on start up.
Price point
Good product, drastically overpriced
My Legacy
I have been using Amsoil since 1979. I started as a dealer while in the Air Traffic Control Acadamy. I maintain between 4 and 8 vehicles routinely [currently 7] and I would not have time for the routine maintenance if it was not for Amsoil. Amsoil is the best oil and by, far the best, oil filter in the industy. My twin sons just became 16 years old. For their birthday I taught them how to change oil in their vehicles using Amsoil. I am passing down the tradition of using Amsoil as my legacy to them. It is the best advice that I can give them.
Happy with the product & support
Happy with the Product and Support. Enjoy the on-line ordering process. The website is easy follow. I use the products for my Pickup & ATV
Independent AMSOIL Dealer #30576570. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.