Yes ..a 20 weight is typically a SAE 20 or 20w-20 ...but all 10w oils that I've ever seen are, in fact, 10w(20). That is, they're sold for the 10w properties and, additionally, although they are motor oils, they're used in transmissions.
How I loath the PDF format
PZ LL 10w
TEST
METHOD
TYPICALRESULTS
SAE Viscosity Grade
SAE J300
15W-40
10W-30
10W
API Service Category
SAE J183
CI-4 PLUS, CI-4, CH-4, CG-4, CF-4, CF/SL
CI-4, CH-4, CG-4, CF-4,CF/SL
CF
Gravity
Specific @ 60°F(15.6°C)
ASTM D-287
0.881
0.875
0.877
°API
29.1
30.2
29.7
Pounds per Gallon
7. 35
7.28
7.33
Flash Point, °C(°F) Min.
ASTM D-92
205(400)
205(400)
205(400)
Pour Point, °C(°F).
ASTM D-97
–33 (-27)
-39 (-38)
–30(-22)
Color
ASTMD-1500
4.0
4.0
4.5
Viscosity
@ 40°C, cSt
ASTM D-445
118
78
38
@ 100°C, cSt
ASTM D-445
15.8
11.7
6.5
Viscosity Index
ASTM D-2270
136
144
120
High Temperature/High Shear Vis., cP
ASTM D-4683
4.3
3.5
2.4
Low Temperature Viscosity
Vis (cP) at Temperature (°C)
ASTM D-2602
6,400 @-20
6,500@-25
7,000 max @-25
Low-Temperature Pumping, cP. (°C)
ASTM D-4684
23,000 @-25
25,000@-30
60,000max @-30
Sulfated Ash Content, % wt.
ASTM D-874
1.3
1.3
Shear Stability, % Vis Loss
DIN Method
< 4.0
--
Total Base Number
ASTM D-2896
11
11
6 min
Typical Properties
Mobil Delvac Hydraulic 10W
SAE Grade 10W
Viscosity, ASTM D 445
cSt @ 40ºC 37.7
cSt @ 100ºC
6.1
Viscosity Index, ASTM D 2270 107
Sulfated Ash, wt%, ASTM D 874 0.5
Total Base #, mg KOH/g, ASTM D 2896 4.0
Pour Point, ºC, ASTM D 97 -30
Flash Point, ºC, ASTM D 92 232
Density @ 15ºC kg/l, ASTM D 4052 0.877
Delo 400
SAE Grade 10W-30 10W 20 30 40 50
Product Number 235200 235109 235117 235118 235120 235119
MSDS Number 6711 6711 6711 6711 6711 6711
API Gravity 30.6 30.6 30.7 29 28.9 28
Viscosity, Kinematic
cSt at 40°C
cSt at 100°C
70
11.1
55
7.0
68
8.9
105
12.1
146
14.9
225
18.4
Viscosity, Cold Crank, °C/Poise -25/64.4 -25/64.4 — — — —
Viscosity Index 150 109 104 104 102 98
Flash Point, °C(°F) 226(439) 221(430) 238(460) 242(468) 250(482) 254(489)
Pour Point, °C(°F) -42(-44) -32(-26) -30(-22) -31(-24) -33(-27) -31(-24)
Sulfated Ash, wt % 1.34 1.18 1.18 1.35 1.35 1.35
Base Number, ASTM D 2896 10.1 9.2 9.2 10.2 10.2 10.2
Phosphorus, wt % 0.126 0.114 0.114 0.116 0.116 0.116
Zinc, wt % 0.140 0.127 0.127 0.127 0.127 0.127
Delo 400 10w, 10w-30, 15w-40, 30, 40, etc