AMSOIL Signature Series 5W-50 Synthetic Motor Oil
NEW AMSOIL Preferred Customer Program

Signature Series 5W-50 Synthetic Motor OilHelp

Signature Series 5W-50 Synthetic Motor Oil Product Image
Click image to enlarge
$12.45 Retail Price (USD)
Package Size:
Unit of Measure:
QTY:
Product Code: AMRQT-EA
Product Highlights View Full Description

AMSOIL Signature Series Synthetic Motor Oil is engineered to outperform conventional and synthetic motor oils. It combines industry-premier synthetic technology with AMSOIL premium additives in a unique formulation that exceeds the higher performance demands of modern engines. Signature Series delivers the performance and value upon which the AMSOIL reputation is built. The culmination of more than 40 years of expertise, its exclusive formulation raises the bar for motor oil performance.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.

Protects Your Engine
AMSOIL Signature Series Synthetic Motor Oil provides outstanding anti-wear protection. It develops a strong fluid film that keeps metal surfaces separated while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. In the industry-standard Sequence IIIG Engine Test, AMSOIL Signature Series Synthetic Motor Oil delivered 75 percent more engine protection against horsepower loss and wear than required by a leading industry standard.** For details, see the Double-Length Sequence IIIG Engine Test Technical Study (G3320).

Maximizes Fuel Economy
Signature Series Synthetic Motor Oil is designed to maximize energy efficiency for optimum fuel economy. Unlike conventional oils, its uniform molecular structure helps it flow more freely and reduce friction between metal surfaces. Anti-friction additives are included to further improve energy efficiency.

Extends Drain Intervals
AMSOIL Signature Series Synthetic Motor Oil can extend drain intervals far beyond those recommended for conventional oils. Its unique synthetic formulation and long-drain additive system are inherently stable to resist oxidation and neutralize acids over longer periods. Signature Series is designed to deliver outstanding engine protection, cleanliness and performance over extended drain intervals. It reduces vehicle maintenance and waste oil.

Keeps Pistons Clean
Excess piston deposits can lead to pre-ignition and engine knocking, which results in lost power, reduced fuel economy and, in severe cases, engine damage. Signature Series’ premium additives and naturally high resistance to extreme heat help keep pistons clean for maximum engine performance. Signature Series prevents piston deposits 93 percent better than required to meet the latest API standard.**

Sequence IIIG

Excels in Extreme Temperatures
Signature Series resists thermal (heat) breakdown better than conventional and synthetic motor oils. It is heavily fortified with detergent and dispersant additives to help prevent sludge deposits and keep engines clean. Unlike conventional oils, Signature Series contains no wax, staying fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear.

Reduces Oil Consumption and Emissions
Volatility (burn-off) occurs when oil gets hot, causing high oil consumption and emissions. Signature Series resists volatility better than other oils, helping reduce oil consumption and emissions.

APPLICATIONS
AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of gasoline-fueled passenger cars and light trucks. It is recommended for all domestic and foreign vehicles requiring any of the following performance specifications:

5W-50 (AMR): API SN, SM...; Ford WSS-M2C931-C (Mustang)

*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are AMSOIL-engineered for use in the applications shown.

COMPATIBILITY
AMSOIL Signature Series Synthetic Motor Oil is compatible with other conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil’s life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives are not recommended for use with AMSOIL synthetic motor oils.

SERVICE LIFE

  • Normal Service – Up to 25,000 miles, 700 hours of operation or one year, whichever comes first, in personal vehicles not operating under Severe Service.
  • Severe Service – Up to 15,000 miles, 700 hours of operation or one year, whichever comes first.

Severe Service: Primarily short trips (less than 10 miles [16 km]); turbo/supercharged engines; commercial or fleet vehicles; excessive idling; first-time use of AMSOIL motor oil in a vehicle with more than 100,000 miles; frequent towing, hauling, plowing or driving in dusty conditions.

  • Modified engines (non-stock) and those using E85 fuel are excluded from extended drain recommendations.
  • Change at the vehicle manufacturer’s recommended drain interval outside U.S. and Canada.
  • AMSOIL Ea® Full-Flow Oil Filters are designed for extended change intervals. With other brands, do not exceed six months or 10,000 miles unless longer intervals are recommended by the vehicle manufacturer.
  • Check oil regularly to maintain proper fill levels.

AMSOIL Ea® Full-Flow Oil Filters are designed for extended change intervals. They stop smaller particles, flow more oil and last longer than regular filters. For best performance, use AMSOIL Ea Full-Flow Oil Filters.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.com/warranty.aspx.

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.

For warranty information, visit www.amsoil.com/warranty.aspx.

AMR Package Sizes
Code Package Size Unit of Measure Product
AMRQT (AMRQT-EA) Quart Each Signature Series 5W-50 Synthetic Motor Oil
AMRQT (AMRQT-CA) Quart Case of 12 Signature Series 5W-50 Synthetic Motor Oil
More about AMSOIL Reviews

REVIEW SNAPSHOT®

by PowerReviews
AMSOILSignature Series 5W-30 Synthetic Motor Oil
 
5.0

(based on 672 reviews)

Ratings Distribution

  • 5 Stars

     

    (650)

  • 4 Stars

     

    (17)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (2)

  • 1 Stars

     

    (2)

99%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

No Cons

Best Uses

No Best Uses
    • Was this a gift?:
    • No (4)

Most Liked Positive Review

 

First time running Amsoil

I changed to amsoil from gm dexos as I wanted something better for my Cruze. After 10k of running dexos as it was included with the car, I switched to amsoil and immediately noticed...Read complete review

I changed to amsoil from gm dexos as I wanted something better for my Cruze. After 10k of running dexos as it was included with the car, I switched to amsoil and immediately noticed the engine running quieter than with dexos. I am happy with the change so far and am looking forward to see how it holds up as I only have 1500 miles on it so far. We'll see what happens when I get into my second oil change.

VS

Most Liked Negative Review

 

Not worth the hoops you have to jump through

The oil is good, but with the membership fee and high shipping costs I am going back to Mobile 1 as I did not see much if any of a difference. There is just...Read complete review

The oil is good, but with the membership fee and high shipping costs I am going back to Mobile 1 as I did not see much if any of a difference. There is just to many hoops they make you jump through. There should just be a cost to buy it and no membership fee that AMS Oil makes people think they are locked in to buying oil from them so they can "get the most of the membership". I think most people find annoying and just go buy another oil rather than pay high prices on top of shipping and also a fee just to buy it at a reasonable price.

Reviewed by 672 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

Awesome product for boxster in WRL

By 

from Fairview TX

Verified Buyer

Comments about Signature Series 0W-40 Synthetic Motor Oil:

Use in 2004 boxster S racecar. Awesome product. Last the whole enduro weekend without worry. Usually 15 hour endurance race.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2004 boxster
 
5.0

The best oil money can buy.

By 

from Phoenix, Az

Verified Buyer

Comments about Signature Series 0W-20 Synthetic Motor Oil:

Years ago I read a synthetic oil life study. The study was very thorough, using different brands of oil, and filters. Amsoil came out on top.

Another thing discovered during this study was shocking. Changing your oil increases engine wear. The oil changes we're done when the TBN reached a low level, and the first sample analyzed after the change always showed higher levels of wear metals. This abated by the second sample.

My Subaru Forester is the first new automobile I've purchased. I need it to last a long time. I'm running Amsoil signature, and a bypass filter. I'm going to have the oil analyzed regularly, and base the change interval on the results.

I hope it will last the rest of my life. I'm 63, so I've still got aways to go.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Subaru Forester, and Victory Cross Count
 
5.0

5w-30 signature series

By 

from Nwi

Verified Buyer

Comments about Signature Series 5W-30 Synthetic Motor Oil:

Always use this in my vehicles. Best oil I've come across. Amsoil or bust

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 2011 silverado
 
5.0

Best oil in the world

By 

from Yuba City Ca.

Verified Buyer

Comments about Signature Series 0W-20 Synthetic Motor Oil:

Hands-down this is the best oil in the world for any vehicle you own.
I've use this oil in my cars and trucks since I've owned them I will never go back to any other type of oil besides Amsoil best product in the world

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Acura TLDodge RAM 2500 4x4
 
5.0

Highly recommend

By 

from Calumet. Mi

Verified Buyer

Comments about Signature Series 5W-30 Synthetic Motor Oil:

C7 Stingray, 2017 Equinox ,, 2009 Vibe

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • See above
 
5.0

love amsoil

By 

from poughkeepsie,ny

Verified Buyer

Comments about Signature Series 5W-30 Synthetic Motor Oil:

love that i can extend oil change intervals

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • pick up truck,snowmobile
 
5.0

Excellent

By 

from redding ca

Verified Buyer

Comments about Signature Series 5W-30 Synthetic Motor Oil:

I only use Amsoil. It is the best

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2010 Subaru Out back
 
5.0

Keep coming back for more

By 

from Manitoba

Verified Buyer

Comments about Signature Series 0W-20 Synthetic Motor Oil:

This oil is fantastic. I run it to its max service interval with the right filter so I change once a year. Cold start temps down to -35C in winter without plugging in and has never let me down.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Toyotas and Yamahas
 
5.0

This oil must work well

By 

from Weirton, West Virginia

Verified Buyer

Comments about Signature Series 5W-30 Synthetic Motor Oil:

I purchased a used 1996 Chevrolet C2500 with 341,000 miles on it. The previous owner said that he only used AMSOIL. So I drove the truck for a thousand miles then changed the oil with AMSOIL. It must work, the truck has the original engine, original transmission and the original exhaust system

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Kubota 4X4 tractor and 11 car and trucks
 
5.0

Long-time user of Amsoil

By 

from Mather, CA

Verified Buyer

Comments about Signature Series 5W-30 Synthetic Motor Oil:

I know exactly how Amsoil will perform in my 2017, F-150, 3.5L/twin turbo. I have used Amsoil for decades and have never had an oil-related problem with any of my engines. Amazing chemistry...that's for sure.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2014 Camry,4 cly. / 2017 F-150/3.5 turbo

Displaying reviews 1-10

Back to top

Previous | Next »