Signature Series – Packaging What You Should Expect

Signature Series Synthetic Motor Oil is not only the best oil we have ever made, it’s better than any competitive oil we have tested. Advanced engine technology and the normal demands of everyday life generate extreme conditions that can challenge motor oil and engine life. Signature Series delivers the ultimate protection against everyday extremes like towing and extended idling. Don’t just take our word for it; read on for proof.

Do you drive in hot temperatures?

In testing, kept pistons clean and held oil thickening to only 6 percent, a minimal amount compared to the proposed specification limit of 150 percent4. 50 percent more detergents5 to help keep oil passages clean and promote oil circulation. Provides 90 percent better protection against sludge6.

Do you have long commutes?

30 percent more acid-neutralizing power8 than Mobil 1*, and 36 percent more than Royal Purple*, helping engines stay cleaner, longer. Reserve protection, so you can go up to 25,000 miles, 700 hours of operation or one year between oil changes, whichever comes first.

Does your vehicle have a turbocharger?

72 percent better turbocharger protection than required2 by the GM dexos1® Gen 2 specification. Achieved 100 percent protection against low-speed pre-ignition (LSPI)3.

Do you tow or haul?

75 percent more engine protection against horsepower loss and wear7.

Do you drive in cold temperatures?

66 percent better cold-temperature performance for easier starting, better fuel economy, improved oil flow and reduced wear.

Do you want extra engine protection?

Far superior wear protection compared to the competition – kept bearings looking like new after 100,000-mile test1.


1Testing conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines. 2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test. 3Based on zero LSPI events in five consecutive tests of AMSOIL Signature Series 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.  4Based on the ILSAC GF-5 PLUS specification. 5vs. AMSOIL OE Motor Oil 6Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification. 7Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification. 8Based upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30, Royal Purple High Performance 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased 05/03/18. *All trademarked names 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.

06Sep 2019
Motorcycle shock cutaway demonstrating the use of fluid.

Fork Oil – Which do I use? John Baker|Aug 22, 2019 10:33 AM A fork oil’s number-one task is to deliver consistency. Consistent dampening despite temperature changes. Consistent rebounds despite different terrain. Consistent performance so you can ride or drive confidently. Consistency. What fluid would provide the best shock consistency? Water. Yes, water. But you […]

05Sep 2019
synchromesh unit

Get the Most out of Your Manual Transmission Few things connect driver and vehicle like a smooth-shifting manual transmission. Although U.S. automakers have steadily moved away from manuals, many enthusiast cars still come with optional manuals. The heavy-duty market is still dominated by manuals, with many of these transmissions being automated. Most modern automobile manual […]

05Sep 2019
Amsoil signature series motor oils

Signature Series – Packaging What You Should Expect Signature Series Synthetic Motor Oil is not only the best oil we have ever made, it’s better than any competitive oil we have tested. Advanced engine technology and the normal demands of everyday life generate extreme conditions that can challenge motor oil and engine life. Signature Series […]

05Sep 2019
Become a AMSOIL dealer

DIRECT JOBBERS: ‘WE’RE A WELL-OILED TEAM’ Direct Jobbers Ken and Denise Chuderewicz of Pittsburgh are a self-described “well-oiled team.” “When we started our AMSOIL business we never gave it a second thought – we are a team,” Ken said. “We have always enjoyed doing things together. We support each other in everything we do. We […]

05Sep 2019

AMSOIL’s My Garage for your Records John Baker|May 12, 2016 1:00 PM   The garage. Protector of vehicles, incubator of great ideas. Many innovative companies owe their beginnings to the humble garage. Apple, Harley-Davidson and Google, to name a few. It makes sense. The house is where we make sensible decisions, do our taxes and […]

05Sep 2019
amsoil girls with a fan

Where in the World is Team AMSOIL? Lindsay Premo|Jan 15, 2018 10:40 AM (Posting archives we missed) Sometimes things get a little hectic around here, race fans. January is one of the busiest times in the AMSOIL Race and Events Department. Last week was the kickoff of Monster Energy Supercross and AMSOIL Arenacross. And with AMSOIL Championship Snocross in full swing, […]