jlhog wrote:I am about ready to do the first service on my PCX. I have some Mobil 1 15W-50 Fully Synthetic left from my Harley that I would like to use. I know 10W-30 is recommended, but will I be ok using the 15-50?
You may get away with using a heaver weight oil for one change and notice nothing immediately other then slightly worse fuel economy. But Honda has the engine spec to run on 30 weight oil so we can't rule out possible issues. It would also void your warranty if they discover the heaver weight oil was used in a warranty repair situation. I dont know the exact technical properties of the Mobil 1 15w-50, but I can show you the comparison for AMSOIL's Motorcycle 10-30 (recommended for our PCX) & the available 20w-50 Motorcycle oil. You'll see the Viscosity numbers are very different & could lead to higher stress in our engine.
Good Luck!
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TYPICAL TECHNICAL PROPERTIES
AMSOIL High Performance Synthetic 10W-30 Motorcycle Oil (MCT)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
11.1
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
72.0
Viscosity Index (ASTM D-2270)
147
Flash Point °C (°F) (ASTM D-92)
242 (468)
Fire Point °C (°F) (ASTM D-92)
254 (489)
Pour Point °C (°F) (ASTM D-97)
-46 (-51)
Noack Volatility, % weight loss (g/100g) (ASTM D-5800)
5.10
Four Ball Wear Test
(ASTM D-4172: 40 kgf, 150°C, 1800 rpm, 1 hr), Scar, mm
0.40
Total Base Number
11
High-Temperature/High-Shear Viscosity,
(ASTM D5481 @ 150ºC, 1.0 x 106 s-1), cP
3.5
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AMSOIL SAE 20W-50 Synthetic Motorcycle Oil (MCV)
Kinematic Viscosity @ 100°C, cSt (ASTM D 445)
20.4
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
162.2
Viscosity Index (ASTM D 2270) 147
Pour Point °C (°F) (ASTM D 97) -40 (-40)
Flash Point °C (°F) (ASTM D-92) 238 (460)
High Temperature/High Shear Viscosity (ASTM D 5481 @ 150°C , 1.0 x 106 s-1), cP 6.1
Four Ball Wear Test (ASTM D 4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour), Scar, mm 0.4
FZG (ASTM D 5182), Load Stage Pass (Wear in mm) 13 (0mm)
Noack Volatility, % weight loss (g/100g) (ASTM D-5800) 3.7
Foam (ASTM D 892, Sequence I, II & III) 0/0/0
Shear Stability Kurt Orbahn (ASTM D-6278), % viscosity change 120 cycles 0.25
Rust Test - Humidity Cabinet (ASTM D 1748) No Rust, Pass
Total Base Number 11.1