Motor Oil Comparison Testing - 2013
 

A Study of SAE 5W-30 Synthetic Motor Oils

Published June 2013

10 Motor Oils Tested
in 5 Performance Areas

List of Oils Tested
AMSOIL Signature Series Synthetic Motor Oil Petro-Canada SUPREME Synthetic
Pennzoil Ultra Quaker State Ultimate Durability
Lucas Synthetic Red Line High Performance Motor Oil
Mobil 1 Extended Performance Royal Purple High Performance Oil
Castrol Edge® Titanium Fluid Strength Valvoline SynPower® Full Synthetic Oil

Each oil was subjected to the following ASTM test methodologies:
• Four-Ball Wear Test (ASTM D4172 Mod.)
• Total Base Number (ASTM D2896)
• Cold Cranking Viscosity (ASTM D5293)
• Thermo-Oxidation Engine Oil Simulation Test (TEOST, ASTM D6335)
• NOACK Volatility Test (ASTM D5800)

Note: All Tests are Performed by Independent ASTM Lab
Download Complete Report

Objective:
Compare the performance in laboratory tests and cost-effectiveness of AMSOIL Signature Series Synthetic Motor Oil to several passenger car/light truck synthetic motor oils widely considered by marketers and con- sumers to be the best available.

Methodology:
Laboratory bench testing conducted in accordance with American Society of Testing and Materials (ASTM) procedures examined several important areas of motor oil performance, including resistance to deposit formation, wear protection, high-temperature stability, resistance to acid formation and cold-temperature performance. Bench tests are used widely to differentiate between formulations.

Four-Ball Wear Test (ASTM d4172 Mod.):
Four Ball Wear TestAccording to the ASTM, the Four-Ball Wear Test can be used to determine the relative wear preventive properties of lubricating fluids in sliding contact under the prescribed test conditions. No attempt has been made to correlate this test with balls in rolling contact. The user of this test method should determine to his own satisfaction whether results of this test procedure correlate with field performance or other bench test machines.

Although not widely used as an engine oil test, the Four-Ball Wear Test provides a means of comparing relative wear-protection properties of lubricating oils. To better differentiate between lubricants, the severity of the test was increased with higher rpm and temperature (the test standard allows for running the test under modified parameters). The size of the scar as a result of the test indicates the level of wear protection the lubricant provides.

Results:
Four-Ball Wear Test results indicate significant differences in relative wear protection between oils. The top four performers limited wear scars to under 0.40 mm. AMSOIL Signature Series Synthetic Motor Oil demonstrated the best wear protection in the Four-Ball Wear Test.

 

Total Base Number (ASTM d2896):
TBN Test ResultsTotal Base Number (TBN) is the measure of a lubricant’s reserve alkalinity, which aids in the control of acids formed during the combustion process. TBN can also be used as a measure of lubricant degradation in service. Motor oils that have a high TBN and demonstrate good TBN retention are known to effectively reduce the corrosive effects of acids over an extended period.

Results:
AMSOIL Signature Series Synthetic Motor Oil tested two numbers higher than the nearest competitor.

 

Cold Cranking Viscosity (ASTM d5293):
Cold Cranking TestThe Cold Crank Simulator Test determines the apparent viscosity of lubricants at low temperatures and
high shear rates. Viscosity of lubricants under these conditions is directly related to low-temperature engine cranking.

The test was performed at -30°C (-22°F). Results are reported in centipoise (cP), with lower values reflecting easier cold starts and reduced battery strain. To meet the API SN and ILSAC GF-5 motor oil specifications, a motor oil’s cold crank viscosity must not exceed 6,600 cP.

Results:
Although synthetic motor oils are known to provide increased low-temperature performance compared to conventional oils, results suggest performance differences between formulations. AMSOIL Signature Series Synthetic Motor Oil demonstrated the lowest cold-crank viscosity (3,727 cP).

 

Thermo-Oxidation Engine Oil Simulation Test (TEOST, ASTM d6335):Teost Test
Motor oils can form deposits when exposed to increased heat, reducing efficiency and contributing to poor overall performance. According to the ASTM, the TEOST test method is designed to predict the high temperature deposit forming tendencies of an engine oil.

This test method can be used to screen oil samples or as a quality assurance tool. Given the number of vehicles now equipped with direct fuel injection, turbochargers and other performance-enhancing technologies that increase heat, deposit control has taken on increased importance. To meet the API SN Resource Conserving and ILSAC GF-5 motor oil specifications, a 5W-30 motor oil must limit total deposit formation to 30 mg or less.

Results:
Results demonstrate a range of performance differences between oils. Only Castrol Edge with Titanium Fluid Strength Technology and AMSOIL Signature Series Synthetic Motor Oil limited total deposit weight to 5 mg or less.

 

NOACK Volatility Test (ASTM d5800):
NOACK TestThe NOACK Volatility Test determines the evaporation loss of lubricants in high-temperature service. Accord- ing to the ASTM, “Evaporation may contribute to oil consumption in an engine and can lead to a change in the properties of an oil.” As with the TEOST test, low values in the NOACK Volatility Test are of particular benefit in modern, hot-running engines.

In the NOACK test, a candidate oil is exposed to heat and circulating air. Following 60 minutes, the remaining oil volume is weighed and compared to the original weight, with the difference reported as the percentage of weight lost. Results must be limited to 15 percent or less to meet the API SN and ILSAC GF-5 specifications.

Results:
While all oils were below the API SN and ILSAC GF-5 upper limit, results indicate differences in high- temperature volatility. Half of the oils limited the percentage weight lost from volatility to under 10 percent, with AMSOIL Signature Series Synthetic Motor Oil having the third-best result.

 

Overall Annual Cost:
annual costAlthough AMSOIL Signature Series Synthetic Motor Oil is recommended for 25,000 miles/one year in normal service, light-duty vehicles accumulate an average of 11,318 miles a year and are generally used in driving conditions that fall under the severe service category. For those reasons, overall annual cost is evaluated at 11,318 miles under severe service driving conditions. Signature Series Synthetic Motor Oil carries a drain interval of up to 15,000 miles/one year, whichever comes first, in severe service. Because the other nine oils do not carry a recommended drain interval, a drain interval of 4,777 miles was used, which represents the average drain interval of motorists as reported in the 2012 National Oil & Lube News Operator’s Survey.

Although Mobil 1 Extended Performance is recommended for 15,000 miles in out-of-warranty vehicles in certain driving conditions, its extended drain recommendation does not apply for this evaluation. According to the official statement on the Mobil 1 Extended Performance label, “Extended service is not recommended in severe service applications involving racing and commercial use, frequent towing or hauling, extremely dusty or dirty conditions, or excessive idling.”

Results:
Though the retail price per quart of AMSOIL Signature Series Synthetic Motor Oil is initially higher, it provides lower costs compared to the other oils. Overall, Signature Series is the most cost-effective oil.

Conclusion:
AMSOIL Signature Series Synthetic Motor Oil ranked first in four of the six comparisons. In contrast, while some oils performed well in a few areas, they did not perform as well in others. Different results from one test to another indicate an emphasis in one area of performance does not correspond to increased performance in other areas of testing. It also reveals the difficulty inherent in formulating a high-quality motor oil that performs well in tests designed to assess optimum engine protection and life.

As engines continue to evolve and demand more from motor oil, the need for premium lubrication becomes more critical. Industry-standard testing performed by an independent, third-party laboratory reveals AMSOIL Signature Series Synthetic Motor Oil to be the overall top-performing oil in these tests. When considering the savings of time and money available due to its 15,000-mile/one-year drain interval in severe service, Signature Series is also the most economical choice.

 




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Motor Oil
Gasoline Engine Oils
0W-16 OE Series Synthetic Motor Oil (OES)0W-16 Signature Series Synthetic Motor Oil (AZS)0W-16 100% Synthetic Hybrid Motor Oil (HE016)0W-20 Signature Series Synthetic Motor Oil (ASM)0W-20 Extended Life Synthetic Motor Oil (XLZ)0W-20 OE Series Synthetic Motor Oil (OEZ)0W-20 LS European Motor Oil (AFE)0W-20 LS-VW European Motor Oil (EZT)0W-20 100% Synthetic High-Mileage Oil (HM020)0W-20 100% Synthetic Hybrid Motor Oil (HE020)0W-20 Synthetic-Blend Motor Oil (SB020)0W-30 MS European Motor Oil (EOT)0W-30 Signature Series (AZO)0W-40 Signature Series Motor Oil (AZF)0W-40 FS European Motor Oil (EFO)0W-40 OE Series Synthetic Motor Oil (OEG)5W-20 Extended Life Synthetic Motor Oil (XLM)5W-20 OE Series Synthetic Motor Oil (OEM)5W-20 Signature Series Synthetic Motor Oil (ALM)5W-20 100% Synthetic High-Mileage Oil (HM520)5W-20 Synthetic-Blend Motor Oil (SB520)5W-30 Signature Series Synthetic Motor Oil (ASL)5W-30 Extended Life Synthetic Motor Oil (XLF)5W-30 LS European Motor Oil (AEL)5W-30 OE Series Synthetic Motor Oil (OEF)5W-30 100% Synthetic High-Mileage Oil (HM530)5W-30 Synthetic-Blend Motor Oil (SB530)5W-40 MS European Motor Oil (AFL)5W-40 FS European Motor Oil (EFM)5W-50 Signature Series Motor Oil (AMR)10W-30 Signature Series Synthetic Motor Oil (ATM)10W-30 Extended Life Synthetic Motor Oil (XLT)10W-30 OE Series Synthetic Motor Oil (OET)10W-30 100% Synthetic High-Mileage Oil (HM1030)10W-40 Extended Life Synthetic Motor Oil (XLO)10W-40 Premium Protection Motor Oil (AMO)10W-60 FS European Motor Oil (ETS)20W-50 Premium Protection Motor Oil (ARO)
Diesel Engine Oils
0W-20 LS European Motor Oil (AFE)0W-20 LS-VW European Motor Oil (EZT)0W-20 Synthetic Diesel Oil (DP020)0W-30 MS European Motor Oil (EOT)0W40 Signature Series CK-4 Diesel Oil (DZF)0W-40 FS European Motor Oil (EFO)5W-30 LS European Motor Oil (AEL)5W30 Signature Series CK-4 Diesel Oil (DHD)5W-30 Synthetic Diesel Oil (DP530)5W-40 MS European Motor Oil (AFL)5W40 Signature Series CK-4 Diesel Oil (DEO)5W40 Heavy-Duty CK-4 Diesel Oil (ADO)5W-40 FS European Motor Oil (EFM)10W30 Heavy-Duty CK-4 Diesel Oil (ADN)10W30 Signature Series Diesel Oil (DTT)10W30 Commercial Grade Diesel Oil (SBDT)10W-40 Premium Protection Motor Oil (AMO)10W-60 FS European Motor Oil (ETS)15W-40 Heavy-Duty Diesel & Marine (AME)15W40 Heavy-Duty CK-4 Diesel Oil (ADP)15W40 Signature Series CK-4 Diesel Oil (DME)15W40 Commercial Grade Diesel Oil (SBDF)20W-50 Premium Protection Motor Oil (ARO)20W-50 DOMINATOR Competition Diesel Oil (DCO)
Motorcycle & Scooter Oils
V-Twin Oil Change Kit (HDCK)SAE 60 Motorcycle Oil (MCS)Engine Assembly Lube (EAL)V-Twin Synthetic Primary Fluid (MVP)V-Twin Synthetic Transmission Fluid (MVT)V-Twin Oil Change Kit (HDBK)V-Twin Oil Change Kit (HDMC)V-Twin Oil Change Kit (HDMB)5W-40 Synthetic Metric Motorcycle Oil (MMF)10W-30 Synthetic Metric Motorcycle Oil (MCT)10W-40 Synthetic Metric Motorcycle Oil (MCF)10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)10W-40 Dirt Bike Oil (DB40)10W-50 Dirt Bike Oil (DB50)10W-60 Dirt Bike Oil (DB60)15W-50 Synthetic Metric Motorcycle Oil (MFF)15W-60 Synthetic V-Twin Motorcycle Oil (MSV)20W-40 Synthetic V-Twin Motorcycle Oil (MVI)20W-50 Synthetic V-Twin Motorcycle Oil (MCV)
Marine Motor Oil
Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)HP Marine Synthetic 2-Stroke Oil (HPM)10W-30 Formula 4-Stroke® Marine Synthetic Motor Oil (WCT)10W-40 Formula 4-Stroke® Marine Synthetic Motor Oil (WCF)15W-40 Heavy-Duty Diesel & Marine (AME)25W-40 Synthetic Blend Marine Engine Oil
Racing & High Performance
SAE 60 Dominator® Synthetic Racing Oil (RD60)Briggs & Stratton Synthetic 4T Racing Oil (GBS2960)Dominator® Synthetic 2-Cycle Racing Oil (TDR)SAE 30 Break-In Oil (BRK)Engine Assembly Lube (EAL)5W-20 Dominator® Synthetic Racing Oil (RD20)10W-30 Dominator® Synthetic Racing Oil (RD30)10W-40 Dominator® Synthetic Racing Oil (RD40)15W-50 Dominator® Synthetic Racing Oil (RD50)
Classic & High Performance
SAE 30 Break-In Oil (BRK)Engine Assembly Lube (EAL)10W-30 Z-ROD Synthetic Motor Oil (ZRT)10W-40 Premium Protection Motor Oil (AMO)10W-40 Z-ROD Synthetic Motor Oil (ZRD)20W-50 Premium Protection Motor Oil (ARO)20W-50 Z-ROD Synthetic Motor Oil (ZRF)
European Motor Oils
0W-20 LS European Motor Oil (AFE)0W-20 LS-VW European Motor Oil (EZT)0W-30 MS European Motor Oil (EOT)0W-40 FS European Motor Oil (EFO)5W-30 LS European Motor Oil (AEL)5W-40 MS European Motor Oil (AFL)5W-40 FS European Motor Oil (EFM)10W-60 FS European Motor Oil (ETS)
High-Mileage Motor Oil
0W-20 100% Synthetic High-Mileage Oil (HM020)5W-20 100% Synthetic High-Mileage Oil (HM520)5W-30 100% Synthetic High-Mileage Oil (HM530)10W-30 100% Synthetic High-Mileage Oil (HM1030)
Hybrid Motor Oil
0W-16 100% Synthetic Hybrid Motor Oil (HE016)0W-20 100% Synthetic Hybrid Motor Oil (HE020)
4-Stroke & Small Engine Oils
Briggs & Stratton Synthetic 4T Racing Oil (GBS2960)0W-40 Formula 4-Stroke® PowerSports Synthetic Motor Oil (AFF)5W-30 Synthetic Small Engine Oil (AES)10W-30 Formula 4-Stroke® Marine Synthetic Motor Oil (WCT)10W-30 Synthetic Small Engine Oil (ASE)10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)10W-40 Formula 4-Stroke® Marine Synthetic Motor Oil (WCF)10W-40 Synthetic Small Engine Oil (ASF)15W-50 Synthetic Small Engine Oil (SEF)25W-40 Synthetic Blend Marine Engine Oil
ATV & UTV Motor Oils
ATV/UTV Oil Change Kits (Polaris)ATV/UTV Oil Change Kits (Can-Am)0W-50 Synthetic ATV/UTV Motor Oil5W-40 Synthetic ATV/UTV Motor Oil5W-50 Synthetic ATV/UTV Motor Oil10W-30 Synthetic ATV/UTV Motor Oil10W-40 Synthetic ATV/UTV Motor Oil
2 Cycle / 2 Stroke Motor Oil
INTERCEPTOR™ 2-Cycle Oil (AIT) Synthetic 2-Stroke Injector Oil (AIO)Dominator® Synthetic 2-Cycle Racing Oil (TDR)Saber™ Synthetic 100:1 Pre-Mix 2-Cycle Oil (ATP)Outboard 100:1 Pre-Mix Synthetic 2-Stroke Oil (ATO)HP Marine Synthetic 2-Stroke Oil (HPM)
Natural Gas Engine Oil
15W-40 (SAE 40) Synthetic Vehicular Natural Gas Engine Oil (ANGV)20W-40 (SAE 40) Synthetic Stationary Natural Gas Engine Oil (ANGS)
Oil & Air Filtration
AMSOIL Motorcycle FiltersMotorcycle Oil Filter (Nano Fiber)AMSOIL Automotive Oil FiltersFull Flow Oil Filter (Nano Fiber)AMSOIL Ea Heavy Duty Oil FiltersHeavy Duty Extended-Life Oil FilterAMSOIL By-Pass Oil Filteration By-Pass Filteration Kits
BMK21 Universal Single-Remote Bypass SystemBMK22 DUAL-GARD Oil Bypass System (Large Engines)BMK23 General Use Dual Remote Oil Bypass UnitBMK26 Ford 7.3L PowerStroke Oil Bypass UnitBMK27 GM 6.6L Dual Remote Bypass SystemBMK28 Ford 6.7L Engine Dual Remote By-Pass Filter KitBMK30 Heavy-Duty By-Pass System (Large Engines)BMK31 Ford 6.0/6.4L Single-Remote Bypass SystemBMK32 GM 6.6L Single-Remote Bypass SystemBMK33 Ford 6.7L Single-Remote Bypass SystemBMK34 Cummins 5.0/5.9/6.7L Bypass System
By-Pass Filter Elements Oil AnalysisAmsoil PowerCore™ Air Filters (PCF)Available Substitute Filter BrandsDonaldson Oil & Air Filters
Donaldson Blue Heavy Duty Air FiltersDonaldson Blue Oil FiltersDonaldson P-Series Heavy Duty Air FiltersDonaldson P-Series Oil & Air Filters
MANN-FILTER Oil, Air, Fuel & CabinWIX Oil, Air, Fuel, Cabin Filters & More
ATF & Gear Lube
Transmission FluidsAutomatic Transmission Fluids
20W-50 Hydrostatic Transmission Fluid (AHF)CG-Tractor Hydraulic/Transmission Oil (TCGSB)OE Multi-Vehicle Synthetic ATFOE Series Fuel-Efficient Synthetic ATFSignature Series Fuel-Efficient Synthetic ATFSignature Series Multi-Vehicle Synthetic ATFSignature Series ULV Synthetic ATFTorque-Drive Transmission Fluid (ATD)Tractor Hydraulic/Transmission Oil (ATH)
100% Synthetic CVT Fluid100% Synthetic DCT FluidManual Transmission Fluids
5W 30 Manual Synchromesh Transmission Fluid (MTF)75W-90 (GL-4) Synthetic Gear Lube (MTG)SAE 50 Long-Life Synthetic Transmission Oil (FTF)
ATV & UTV Drive Train Fluids
Synthetic ATV/UTV Powertrain FluidATV/UTV Dual-Clutch Transmission FluidATV/UTV Transmission & Differential Fluid
Motorcycle Transmission Fluids
Synthetic Dirt Bike Transmission Fluid (DBTF)V-Twin Synthetic Primary Fluid (MVP)V-Twin Synthetic Transmission Fluid (MVT)
Gear LubeHigh Performance Gear Lube
75W 85 Severe Gear® Extreme Pressure (SVL)75W 90 Severe Gear® Extreme Pressure (SVG)75W-110 Severe Gear® Extreme Pressure (SVT)75W-140 Severe Gear® Extreme Pressure (SVO) 75W-90 (GL-4) Synthetic Gear Lube (MTG)AMSOIL Hand Pump For BottlesAMSOIL Marine Gear Lube PumpSEVERE GEAR 80W-90 (AGL)
Semi Truck Gear Lube
75W-90 Semi-Truck Gear Lube (FGR)80W-140 Semi-Truck Gear Lube (FGO)SAE 50 Long-Life Synthetic Transmission Oil (FTF)
Racing & Off Road Gear Lube
SAE 250 Severe Gear Racing Gear Lubricant (SRT)Super Shift Racing Transmission Fluid (ART)
Marine Gear Lube 75W/80W-90 (AGM)Gear Lube AdditiveLimited Slip Differential (LSD) Additive Powershift Transmission FluidPowershift Transmission Fluids
Powershift Transmission Fluid SAE 10W (CTG)Powershift Transmission Fluid SAE 30 (CTJ)Powershift Transmission Fluid SAE 50 (CTL)
ATF for Racing, Ford Type F & Allison C-4Super Shift Racing Transmission Fluid
Miscellaneous
Grease
100% SYNTHETIC EP NLGI 00 GREASE (GSF)Deluxe Grease Gun KitDOMINATOR Synthetic Racing Grease (GRG)Lithium Complex High Viscosity Grease (GVC)Polymeric Off-Road Grease (GPOR1)Polymeric Off-Road Grease (GPOR2)Polymeric Truck, Chassis & Equipment (GPTR1)Polymeric Truck, Chassis & Equipment (GPTR2)Synthetic Multi-Purpose Grease NLGI #2 (GLC)Synthetic Water Resistant Grease NLGI#2 (GWR)X-Treme Food Grade Grease (GXC)
Engine Flush & Degreaser
Engine and Transmission Flush (FLSH)Engine Degreaser (AED)Exterior Ceramic Spray (CSF)Glass Cleaner (AGC)Heavy Duty Degreaser (ADG) High-Foam Car Shampoo (HFB)Interior Detailer Light Lemon (IDL)Interior Detailer Scent Free (IDN)Miracle Wash (AMW) Mudslinger® (AMS)Power Foam Engine Cleaner & Degreaser (APF)
Spray Lubricants
Chain Lube (ACLSC)Engine Fogging Oil (FOG) MP Heavy Duty Metal Protector (AMH)MP Metal Protector (AMP)Silicone Spray (ALS) Spray Grease (GSP)
Bar & Chain Oil
Semi-Synthetic Bar and Chain Oil (ABC)Synthetic Chain Case & Gear Oil (TCC)
Suspension & Fork Oil
Suspension Fluid #10 Medium (STM)Suspension Fluid #5 Light (STL)
Power Steering FluidDOT Brake Fluid
DOMINATOR DOT 4 Brake Fluid (BFR)DOT 3 and 4 Synthetic Brake Fluid (BFLV)
Antifreeze & Coolant
Antifreeze and Engine Coolant (ANT)Dominator Coolant Boost (RDCB)Heavy-Duty Antifreeze & Coolant (ANTHD)Passenger Vehicle Antifreeze (ANTPC)Powersports Coolant (PSAF)
Air Tool Oil
Synthetic Air Tool Oil (AIR)
Firearm Protectants
Brake and Parts Cleaner (BPC)Firearm Cleaner and Protectant (FCP)Firearm Lubricant and Protectant (FLP)
Industrial Lubricants
Compressor Oils - SyntheticPC Series Compressor Oils Synthetic Compressor OilsSynthetic Compressor OilsDC Series Compressor Oils Sirocco SE Series Ester Compressor OilHydraulic Oils - SyntheticAW Series Antiwear Hydraulic OilsBiodegradable Hydraulic OilSlideway, Chain, Bearing and Gear OilSG SERIES Extreme Pressure Gear OilsHydraulic Oils - SyntheticHV Series Hydraulic OilsWL SERIES Slideway, Chain and Gear LubeRC Series R&O/AW Gear And Bearing OilsHT Series High Temperature Lubricating Oils
Fuel Additive
Gasoline Fuel AdditivesP.I. Performance Improver (API)Upper Cylinder Lubricant (UCL)Dominator Octane Boost (AOB)Gasoline Stabilizer for Storage (AST)Motorcycle Octane BoostMotorcycle Octane Boost (MOB)Small Engines & PowersportsSmall Engines Fuel Treatment & StabilizerDiesel Fuel AdditivesDiesel Injector Clean (ADF)Diesel All-In-One (ADB)Diesel Injector Clean + Cetane Boost (ADS)Diesel Cold Flow Improver (ADD)Cetane Boost for Diesel Fuel (ACB)Diesel Recovery Emergency Fuel Treatment
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