The World’s Source for Engine Oil Data

Oil Tests Conducted

The IOM Test Matrix

The IOM Test Matrix consists of all the bench tests required to categorize the engine oil for meeting various international engine oil standards.

Listed below are the tests completed on over 18,000 oils in the IOM database. 

Viscosity

Test Description Method
CCS Low temperature, high shear stress viscosity using the Cold Cranking Simulator Viscometer. Test predicts the comparative ability of an oil to give satisfactory low-temperature engine cranking speed. Reported in cP. ASTM D5293
CCS Scan CCS viscosity values over a low-temperature range from -10°C to -35°. Indicates affects of low temperatures on startability over full range of scan. Reported in cP in the database and represented as a line graph in the IOM Primary Report. ASTM D5293
Fuel Efficiency Index (Viscosity-Dependent) Uses the dynamic viscosity measurements to determine the projected fuel efficiency of an oil. Reported as an index value. SAVLAB FE
Gelation Index and Gelation Index Temperature Gives Gelation Index and Gelation Index Termperature using the Scanning Brookfield Technique. Determines the tendency of an oil to cause problems by forming a gelated structure at temperatures below 0°C (32°F). Also depicted graphically in the IOM Primary Report. ASTM D5133
High Temp. High Shear Viscosity at 100°C High temperature high shear rate viscosity using the Tapered Bearing Simulator (TBS) Viscometer determines the dynamic viscosity of engine oil at 100°C and one million reciprocal seconds. Simulates the ability of an oil to meet the hydrodynamic needs of the engine in high shear areas. Reported in cP. ASTM D6616
High Temp. High Shear Viscosity at 150°C High temperature high shear rate viscosity using the Tapered Bearing Simulator (TBS) Viscometer determines the dynamic viscosity of engine oil at 150°C and one million reciprocal seconds. Simulates the ability of an oil to meet the hydrodynamic needs of the engine in high shear areas. Reported in cP. ASTM D4683
High Temp. High Shear Viscosity (Degraded) at 100°C High temperature high shear rate viscosity using the Tapered Bearing Simulator (TBS) Viscometer after degrading the oil using the Kurt Orbahn Shear Stability Test. Determines the dynamic viscosity of oil at 100°C and one million reciprocal seconds after permanent shear loss. Simulates the ability of an oil to withstand viscosity degradation and meet the hydrodynamic needs of the engine in high shear areas. Reported in cP. ASTM D6616 & D6278
High Temp. High Shear Viscosity (Degraded) at 150°C High temperature high shear rate viscosity using the Tapered Bearing Simulator (TBS) Viscometer after degrading the oil using the Kurt Orbahn Shear Stability Test. Determines the dynamic viscosity of oil at 150°C and one million reciprocal seconds after permanent shear loss. Simulates the ability of an oil to withstand viscosity degradation and meet the hydrodynamic needs of the engine in high shear areas. Reported in cP. ASTM D4683 & D6278
High Temp. Low Shear Viscosity at 100°C High temperature low shear viscosity using the Tannas Basic Rotary (TBR) Viscometer. Determines the dynamic viscosity of oil at 100°C and two hundred reciprocal seconds. Helps to characterize the Viscosity Index improver used in a given engine oil. Reported in cP. SAVLAB TBR
High Temp. Low Shear Viscosity at 150°C High temperature low shear viscosity using the Tannas Basic Rotary (TBR) Viscometer. Determines the dynamic viscosity of oil at 150°C and two hundred reciprocal seconds. Helps to characterize the Viscosity Index improver used in a given engine oil. Reported in cP. SAVLAB TBR
High Temp. Low Shear Viscosity (Degraded) at 100°C High temperature low shear viscosity using the Tannas Basic Rotary (TBR) Viscometer after degrading the oil using the Kurt Orbahn Shear Stability Test. Determines the dynamic viscosity of an oil at 100°C and two hundred reciprocal seconds after permanent shear loss. Helps to characterize the Viscosity Index improver used in a given engine oil. Reported in cP. SAVLAB TBR & ASTM D6278
High Temp. Low Shear Viscosity (Degraded) at 150°C High temperature low shear viscosity using the Tannas Basic Rotary (TBR) Viscometer after degrading the oil using the Kurt Orbahn Shear Stability Test. Determines the dynamic viscosity of an oil at 150°C and two hundred reciprocal seconds after permanent shear loss. Helps to characterize the Viscosity Index improver used in a given engine oil. Reported in cP. SAVLAB TBR & ASTM D6278
Kinematic Viscosity Kinematic Viscosity at 40°C and 100°C. Reported in cSt. ASTM D445
Kinematic Viscosity (Degraded) Kinematic Viscosity at 100°C after degrading the oil using the Kurt Orbahn Shear Stability Test. Determines the kinematic viscosity of an oil after permanent shear loss. Reported in cSt. ASTM D445 & D6278
MRV / TP-1 Low temperature low shear viscosity using the Mini-Rotary Viscometer with a specified temperature profile. Predicts the ability of oil to permit satisfactory flow to the engine oil pump at the SAE specified temperature. Reported in cP. (Not applicable with straight-grade samples.) ASTM D4684
Scanning Brookfield Viscosity Low temperature low shear viscosity using the Scanning Brookfield Technique (SBT). Predicts the ability of oil to permit satisfactory flow to the engine oil pump screen and to the pump over a range of cold temperatures from 0°C to -40°C. Reported in °C and cP. Also depicted graphically in the IOM Primary Report. ASTM D5133
Viscosity Index An empirical measure of the viscosity-temperature relationship. Used to determine the characteristics of base oils and the effects of VI Improvers. The value is determined from Kinematic Viscosity measurements at 40° and 100°C. ASTM D2270
Viscosity Loss Profile Uses the HTHS and HTLS viscosity values at 100°C and 150° before and after permanently shearing the oil using the Kurt Orbahn to determine the five forms of Temporary and Permanent Viscosity Losses. Values characterize the oil’s shear stability and are related to the molecular weight distribution of the VI Improver used in formulating and blending the engine oil. Reported graphically and in percent loss values. SAVLAB VLP

Oxidation

Test Description Method
TEOST 33C Thermo-Oxidation Engine Oil Simulation Test, 33C method. Measures the deposit-forming tendencies of an engine oil in the turbocharger at very high temperatures. Reported in milligrams of deposit. ASTM D6335
TEOST MHT Thermo-Oxidation Engine Oil Simulation Test, MHT method. Measures the deposit-forming tendencies of an oil at piston ring-pack operating temperatures. Reported in milligrams of deposit. (Not conducted on heavy-duty diesel engine oils.) ASTM D7097
TFOUT Oxidation resistance by using the Thin Film Oxygen Uptake Test. Measures the length of time an oil withstands oxidation during exposure to oxygen at 160°C. Reported in minutes of resistance until the oxygen pressure falls sharply indicating the anti-oxidant has been overwhelmed or until the oil surpasses 500 minutes without overwhelming the anti-oxidant. ASTM D4742

Foaming / Emulsion / Volatility

Test Description Method
E85 Emulsion Retention Bio-fuels like E85 have a greater tendency to form water contamination during engine operation which can negatively affect the lubrication and detergency of the engine oil. The test evaluates the ability of an engine oil, contaminated with a specified amount of water and simulated E85 fuel, to emulsify the water after agitation and to maintain this emulsion at temperatures of 20 °C to 25 °C and -5 °C to 0 °C for at least 24 h. (Only conducted on samples claiming ILSAC service categories.) ASTM D7563
Foaming Characteristics Determines the foaming characteristics of an oil at specified temperatures and conditions. Both the foaming tendency and stability of the foam are rated using Sequences I-IV and reported in mL and minutes, respectively. ASTM D892 & D6082
Noack Volatility Volatility of the engine oil at 250°C using the non-Woods Metal version of the Noack. Measures percent oil volatilized during the test. ASTM D5800
Phosphorus Emission Index Analysis of the volatilized oil to determine the amount of catalyst-contaminating phosphorus compounds volatilized with the oil. Determines the milligrams of phosphorus volatilized per liter of the engine oil tested. Reported as an index value. SAVLAB PEI
Simulated Distillation by GC Presents the chromatographic 'fingerprint' of the oil. Also reports the percent oil volatilized at 371°C (700°F). ASTM D6417
Sulfur Emission Index Analysis of the volatilized oil to determine the amount of sulfur compounds volatilized with the oil. Determines the milligrams of sulfur volatilized per liter of the engine oil tested. Reported as an index value. SAVLAB SEI

Chemical Analysis / Physical Properties

Test Description Method
Base Number Base Number (or Total Base Number) determines the ability of an oil to neutralize combustion or engine oil oxidation acids. Reported in mgKOH/g. ASTM D2896
Elemental Analysis by ICP Analysis of a broad range of elements (Al, Sb, Ba, B, Ca, Cr, Cu, Fe, Pb, Mg, Mo, Ni, P, Si, Ag, Na, Sn, Ti, Zn) using Inductively Coupled Plasma Emission Spectrometer (ICP). The test shows concentration of the foregoing metal and non-metal-containing components present in the engine oil formulation. Also provides information on some forms of contamination from additive processing and formulation. Reported in parts per million. ASTM D5185
Flash Point Measures the temperature at which flammable fumes above the fluid will flash. Used in assessing the overall flammability hazard of an oil. Can indicate the possible presence of more volatile and flammable materials in relatively nonvolatile or nonflammable fluids. Reported in °C and °F. ASTM D92
Nitrogen Nitrogen content by chemiluminescence. Measures the amount of nitrogen associated with ashless detergents. Reported in percent by weight. ASTM D5762
Sulfated Ash (Calculated) Conversion of metal-containing components of a lubricant determined by ICP into metal sulfates and oxides. A measure of overall metallo-organic ash-forming components in a lubricant. Reported in percent by weight. SAVLAB SULFCALC
Sulfur Sulfur content by pyro-fluorescence. Measures the total amount of sulfur in the formulated engine oil. Reported in percent. ASTM D5453