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Glossary of Terms
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C
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D
de-oiling
deaerator
deasphalting
degas
degradation
dehydrator
delamination wear
demerit rating
demulsibility
demulsifier
denaturing oil
density
DEO
Department of Transportation (DOT)
deplete
depletion allowance
deposits
depth filter
depth filter media
dermatitis
desoprtion
detergent
detergent oil
detergency
detergent-dispersant
detonation
dewaxing
dibasic acid ester (diester)
dielectric
dielectric loss
dielectric strength (breakdown voltage)
diesel engine
diesel fuel
diesel index
dieseling
diester
differential pressure indicator
differential pressure valve
Dilchil®
diluent
dilution of engine oil
dimer
DIN
directional control servo valve
DKA
dN factor
diolefin
direct additive
directional control valve
dirt capacity
dispersant
dispersion
disposable
dissipation factor
dissolved air
dissolved gases
dissolved water
distillate
distillate fuel
distillation (fractionation)
distillation method
distillation test
distillation tower
dolomite
double seal
drag
drag-reducing additive (DRA)
drain interval
drawing
drawing compound
drilling
drilling fluid
drilling mud
drilling oil
drop-feed oiler
dropping point
drum
dry lubrication
dry point
dry running
dry sump
dual line system
dumbbell blend
duplex filter
dynamic demulsibility
dynamic load
dynamic seal
dynamometer
dyne
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F
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G
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H
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I
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J
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K
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L
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M
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N
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O
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P
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Q
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R
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S
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T
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U
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V
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W
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X
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Y
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Z
D
D
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