Oil viscosity
Local climate does effect choices. Start up temperatures more than operating temperatures. Operating temperature is more a combination of air temperature, engine specifics and load.
I too prefer Farenheight, but you guys in Mexico and Australia probably are just the opposite on that. :LOL: That's why I didn't convert to F.
Anyway, maybe it will be helpful.
Lets say the engine is designed to operate on 10W-30 or 10W-40, and expected OIL Temperatures are around 212 F/100 C. From that we can figure that 15 to 20 cSt is the range of operating viscosity (marked in gray). Higher end for warmer conditions, looser engines, and lower end for the opposite.
If the engine is being used in way that increases oil temps 20 C (36 F) degrees, then we can choose a higher weight oil and get the same operating viscosity.
M1 is Mobile 1, T was Rotella, VR1 is Valvoline. SAE is typical
Local climate does effect choices. Start up temperatures more than operating temperatures. Operating temperature is more a combination of air temperature, engine specifics and load.
I too prefer Farenheight, but you guys in Mexico and Australia probably are just the opposite on that. :LOL: That's why I didn't convert to F.
Anyway, maybe it will be helpful.
Lets say the engine is designed to operate on 10W-30 or 10W-40, and expected OIL Temperatures are around 212 F/100 C. From that we can figure that 15 to 20 cSt is the range of operating viscosity (marked in gray). Higher end for warmer conditions, looser engines, and lower end for the opposite.
If the engine is being used in way that increases oil temps 20 C (36 F) degrees, then we can choose a higher weight oil and get the same operating viscosity.
M1 is Mobile 1, T was Rotella, VR1 is Valvoline. SAE is typical