ATF viscosity compared to PCMO

[PT1]

Does anyone know how DexIII or TypeF ATF compares to motor oil? Would it be a 20w or 30w?

 

[StevieC]

Look at the 100 degree CST's for motor oils and for the ATF's and compare... The lower the number the thinner it is.

 

[Gary Allan]

Most are what would be a lower 20 weight. They typically (or did) shear quickly into the 10 range. The newer formulations appear more stable ..not that it seemed to make much of a difference in acceptable performance.

 

[mechtech2]

I think they are thinner than a 20 to start with.

 

[WGermany]

Think it goes 0w20(Dex 6)and 5w20(OLD Dexron III / Mercon). I believe Mopar ATF+4 and Mercon V are 0w20 too.

 

[Gary Allan]

Typical Properties

Superflo ATF D/M
Viscosity
cSt @ 40ºC 32.1
cSt @ 100ºC 6.9 (above 5.6cSt)
cP @ -40ºC 16,670
Viscosity Index 183
Flash Point, ºC (ºF) 180 (356)
Gravity, API 31.3
Color Red

Typical Properties

AAMCO® ATF+3®
Viscosity
cSt @ 40ºC 33.7
cSt @ 100ºC 7.6 (ditto)
cP @ -40ºC 18,000
Viscosity Index 200
Flash Point, ºC (ºF) 180 (356)
Pour Point, ºC (ºF) -42 (-44)
Gravity, API 31
Color Red

Typical Properties

Mobil Delvac Synthetic ATF
Viscosity, ASTM D 445
cSt @ 40º C 39
cSt @ 100º C 7.3 (ditto)
Brookfield Viscosity, ASTM D 5293
-cP @ -40º C 8400
Viscosity Index, ASTM D 2270 168
Pour Point, ºC, ASTM D 97 -54
Flash Point, ºC, ASTM D 92 236
Density @15º C kg/l, ASTM D 4052 0.85
Color Red

AMSOIL Synthetic Universal Automatic Transmission Fluid (ATF)

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)


7.6 (ditto)

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)


38.9

AMSOIL Synthetic Fuel Efficient Automatic Transmission Fluid (ATL)

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)


6.0 (close - but still in the 20 grade)

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)


29.8

Viscosity Index (ASTM D-2270)


153
Flash Point °C (°F) (ASTM D-92)


226 (439)
Fire Point °C (°F) (ASTM D-92)


244 (471)

Pour Point °C (°F) (ASTM D-97)


-53 (-63)
Four Ball Wear Test @ 75°C, 1200 rpm, 40 kg, 1 hr, Scar, mm (ASTM D-4172)


0.40
Brookfield Viscosity, cP (ASTM D-2983)


9050
Copper Corrosion, 150°C, 3 hr (ASTM D-130)


1b

Viscosity Index (ASTM D-2270)


168
Flash Point °C (°F) (ASTM D-92)


234 (453)

Pour Point °C (°F) (ASTM D-97)


-53 (-63)
FZG Load Stage Pass (ASTM D-5182)
12
Four Ball Wear Test, Scar in mm; 40 kg, 75°C, 1200 rpm, 1 hr (ASTM D-4172B)


0.41
Brookfield Viscosity @ -40°C, cP (ASTM D-2983)


9800


A motor oil that fits this use is 10w. It's a 20 grade but is for transmissions. It's actually a 10w-20 ..but cannot make the 2.6 HTHS ..so it can't be called a 20 grade. Hence "10w".