Glossary of Terms
This Glossary of Terms is a comprehensive, alphabetized list of terms and definitions relating to the oil analysis industry. It is an exceptional resource for further explanation of the content you will find on this website.
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- Ablation
- Abrasion
- Absolute (Dynamic) Viscosity
- Absorption
- Accumulator
- Accuracy
- Acid
- Acid digestion
- Acid Treating
- Acidity
- Active metal
- Additives
- Adhesion
- Adsorption
- Aeration
- Aerosol
- Aftercooling
- Agglomeration
- Air entrainment
- Alkali
- Alloy steel
- Ambient temperature
- Anhydrous
- Aniline point
- Annealing
- Anodizing
- API base stock
- API engine service categories
- API gravity
- Apparent viscosity
- Aromatic
- Ash
- Asperities
- Auto-ignition point
- Babbitt
- Bactericide
- Bactericide
- Base
- Base stock
- Batch
- Bearing
- Beta Rating
- Beta ratio (ß-ratio)
- Black oils
- Blend(ing)
- Bloom
- Blow-by
- Boiling point
- Bottoms
- Boundary lubrication
- Brinelling
- Brookfield viscosity
- BS&W (bottom sediment and water)
- BTU
- Bubble point
- Burst pressure rating
- Bushing
- Bypass filtration
- Bypass valve
- Calibration / standardization
- Cam
- Capacity
- Capillarity
- Capillary viscometer
- Carbon
- Carbon residue
- Case drain filter
- Catalyst
- Catalytic converter
- Catastrophic failure
- Cavitation
- Cavitation damage
- Cellulose media
- Centipoise (cP)
- Centistoke (cSt)
- Centralized lubrication
- Centrifugal separator
- Certificate of analysis
- Cetane improver
- Cetane index
- Cetane number (calculated)
- Channeling
- Chip detector
- Chromatography
- Circulating lubrication
- Clean room
- Cleanable filter
- Cloud point
- Coalescer
- Coefficient of friction
- Cohesion
- Cold cranking simulator (CCS)
- Collapse
- Collapse pressure
- Colloid
- Complex grease
- Compound
- Compounding
- Compressibility
- Compression
- Compression ratio
- Consistency
- Contaminant
- Contaminant capacity
- Contaminant failure
- Contaminant lock
- Contamination control
- Coolant
- Coolant
- Copper strip corrosion
- Correlation
- Corrosion
- Coupling
- Cracking
- Crown
- Cryogenics
- Cutting fluid
- Cycle
- Cyclic stress
- Cylinder
- Deaerator
- Defect
- Degas
- Degradation
- Dehydrator
- Delamination
- Demulsibility
- Density
- Deposit
- Depth filter
- Desorption
- Detection limit
- Detergent
- Dielectric Strength
- Dieseling
- Differential pressure indicator
- Disposable
- Dissolved gases
- Distillation
- Dry-film lubricant
- Duplex filter
- Effluent
- Elastohydrodynamic lubrication
- Electrostatic separator
- Emulsibility
- Emulsion
- Environmental contaminant
- Erosion
- Failure
- Fatigue
- Fault
- Ferrography
- Film strength
- Filter
- Filter efficiency
- Filter element
- Filter head
- Filter housing
- Filter life test
- Filter media, depth
- Filter media, surface
- Filtration
- Fire point
- Fire-resistant fluid
- Flash point
- Flaw
- Flow fatigue rating
- Flow rate
- Flow, laminar
- Flow, turbulent
- Flowmeter
- Fluid
- Fluid compatibility
- Fluid power
- Flushing
- Foam
- Force feed lubrication
- Fourier Transform
- Fretting corrosion
- Friction
- Full fluid-film lubrication
- Full-flow filtration
- Hardness
- Heat exchanger
- Housing
- Hydraulic Fluid
- Hydraulics
- Hydrocarbon
- Hydrodynamic lubrication
- Hydrofinishing
- Hydrolysis
- Hydrolytic stability
- Hydrometer
- Hydrostatic lubrication
- Hypoid gear lubricant
- Idler
- Immiscible
- In-line filter
- Indicator
- Indicator, differential pressure
- Influent
- Infrared spectra
- Ingested contaminants
- Inhibitor
- Insolubles
- Interfacial tension (IFT)
- ISO Solid Contaminant Code
- ISO viscosity grade
- Magnetic filter
- Magnetic plug
- Maintenance
- Manifold
- Manifold filter
- Matrix
- Matrix matching
- Media
- Media migration
- Medium
- Micron, micrometer (µm)
- Middle distillate
- MIL-Spec
- Mineral oil
- Miscible
- Motor
- Multigrade oil
- Multigrade oil
- Multipass or recirculation test
- Naphthenic
- Napthene
- Neutralization number
- Newtonian fluid
- Nitration
- NLGI number
- Noble metal
- Nominal filtration rating
- Non-Newtonian fluid
- Pale oil
- Paraffinic
- Particle
- Particle count
- Patch test
- Penetration
- Permeability
- pH
- Pinion
- Platelet
- Pleated filter
- Pneumatics
- Poise (absolute viscosity)
- Polar compound
- Polishing (bore)
- Polymerization
- Pore
- Pore size distribution
- Porosity
- Positive crankcase ventilation (PCV)
- Power unit
- Pressure
- Pressure drop
- Pressure line filter
- Pressure, absolute
- Pressure, atmospheric
- Pressure, back
- Pressure, cracking
- Pressure, rated
- Pressure, system
- Process contamination
- Process oil
- Pump
- Pump, fixed displacement
- Pump, variable displacement
- Pumpability
- Rate of shear
- Reducer
- Refraction
- Rerefining
- Reservoir
- Reservoir (sump) filter
- Residual dirt capacity
- Return line
- Return Line Filtration
- Ring lubrication
- Ring sticking
- Rings
- Roll-off cleanliness
- Roller bearing
- Rust
- Rust prevention test
- SAE viscosity numbe
- Saturation level
- Saybolt Universal Viscosity (SUV) or Saybolt Universal Seconds, (SUS)
- Scuffing
- Semisoli
- Shear rate
- Shear stress
- Silt
- Silting
- Single-pass test
- Sintered medium
- Sleeve bearing
- Sludge
- Soap
- Solid
- Solvency
- Spall
- Specific gravity
- Spectrometry
- Spin-on filter
- Spindle oil
- Splash lubrication
- Stainless steel
- Starting fluid (diesel)
- Static friction
- Statistical process control
- Statistical quality control
- Stoke (St)
- Strainer
- Stringer
- Suction filter
- Sulfated ash
- Sulfurized oil
- Surface filtration
- Surface tension
- Surfactant
- Surge
- Swarf
- Switch, pressure
- Synthetic lubricant
- Synthetic oil
- Tensile strength
- Thermal conductivity
- Thermal stability
- Thermography
- Thin film lubrication
- Thixotropy
- Traceability
- Tribology
- Turbidity
- Turbulent flow sampler
- Vacuum separator
- Valve
- Valve lifter
- Valve, by-pass
- Valve, directional contro
- Valve, directional control, servo
- Valve, flow contro
- Valve, pressure control, relief
- Valve, relief, differential pressure
- Vapor pressure
- Vapor Pressure (Reid method or RVP)
- Varnish
- Viscometer or Viscosimeter
- Viscosity
- Viscosity grade
- Viscosity index (VI)
- Viscosity, absolute
- Viscosity, kinematic
- Viscosity, SUS
- Viscous
- Volatility
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