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98whitelightnin

oil properties

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I dont know how to read the oil properties but I have 2 examples and wonder which is better.

Example A

TYPICAL PROPERTIES

SAE Grade 15W-40

Specific Gravity @ 60ºF/15ºC 0.872 – 0.88

Viscosity @ 40°C cSt (ASTM D-445) 102 – 108

Viscosity @ 100°C cSt (ASTM D-445) 14.00-16.00

CCS Viscosity @ -20°C cP (ASTM D-5293) 5,700

High Temperature High Shear Viscosity 302°F/150°C cP 4.3

High Temperature High Shear Viscosity 302°F/150°C cP after 90

cycles shear (ASTM D-7109) 4.0

Mini-rotary Viscosity-TP.1 @ -25°C cP (ASTM D-4684) 20,500

Mini-Rotary Viscosity @ -20°C, cP -180hr sooted oil sample

(Mack T-11A ASTM D-6896 15,236

Viscosity Index (ASTM D-2270) 154

Flash Point °F/°C (ASTM D-92) 440°/221°

Fire Point

°F/°C (ASTM D-92) 490°/254°

Pour Point

°F/°C (ASTM D-97/D-5950) -38°/<-39°

Sulfated Ash Content % Wt. (ASTM D-874) 0.951

Total Base Number (ASTM D-2896) 10

NOACK Volatility (ASTM D-5800)

% Evaporation Loss @ 250°C 9.5%

Shear Stability % Viscosity Loss – 90 Passes (ASTM D-7109) 9.96%

Foam Test (ASTM D-892 Option A)

Sequence I 0/0

Sequence II 0/0

Sequence III 0/0

High Temperature Foam Test (ASTM D6082 Option A) 0/0

Sequence IIIG

% Viscosity Increase @ 40°C EOT 75%

Cummins Bench Corrosion Test (ASTM D-6594)

Copper increase, ppm 8

Lead increase, ppm 27

Tin increase, ppm 0

Copper Strip Rating 1a

Example B

TYPICAL TECHNICAL PROPERTIES

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

15.6

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

114.9

Viscosity Index (ASTM D-2270)

144

CCS Viscosity @ -20°C, cP (ASTM D-5293)

4677

Pour Point °C (°F) (ASTM D-97)

-36 (-32)

Flash Point °C (°F) (ASTM D-92)

232 (450)

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

0.35

Noack Volatility, % weight loss (ASTM D-5800)

9.4

High Temperature/High Shear Viscosity (ASTM D-4683)

4.4

Total Base Number

12.1

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The bottom oil is thicker, and will last longer based on the TBN. The pour point on the bottom one is a little lower, but that will only effect you if you get that cold.The bottom one is Amsoil PCO, whats the top?

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Correct, its the 15w40 semi-synthetic and the top one is Schaeffer 15w40 CJ-4 semi-synthetic. I have been looking for "that perfect oil", since I have nothing better to do until I get back home, and have come accross different brands that looked good. I have 15w40 HD diesel & marine amsoil in my 03 and plan to continue running it but my 98 has 226k and I have been using valvoline PB 15w40 CI-4 but its impossible to find in Texas and I want to try something new. I may just go ahead and get another membership with amsoil again and buy the semi-synthetic for the 98 because im gonna continue to run it in the 03 and I could save on shipping maybe ordering it both from them.

--- Update to the previous post...

I got me a preferred customer account with Amsoil, thanks Bill.

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I have never ran the Amsoil semi synthetic, but I always read great things about it... It has crossed my mind to run it and dump it once a year, vs the AME and running for 15K miles... But the AME is working for me, so why change. Its only .90 less a qt.

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