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Can you use 100LL in place of engine oil???

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The real interesting question is... why is Aeroshell 100 a 50 weight oil? Wouldn't it make more sense to be Aeroshell 50? I know. If it makes sense.....
 
FrozenPilot said:
The real interesting question is... why is Aeroshell 100 a 50 weight oil? Wouldn't it make more sense to be Aeroshell 50? I know. If it makes sense.....
Because the two are different grading systems. Aviation oils use a number which is based on a viscosity index called Saybolt Seconds Universal. This comes from the time it takes a certaion sized oil sample to drip through a specified orificie at 210 degrees farenheit. 100 grade, for example takes 100 seconds for a sample to drip through. The Society of Automotive Engineers (SAE) grade, commonly referred to as "weight" is a different grading system
 
So, what about when you use, say, 15/50w? Is it just like a car, 15w when cold, 50w when at temperature?
 
jknight8907 said:
So, what about when you use, say, 15/50w? Is it just like a car, 15w when cold, 50w when at temperature?
Yeah, the multi viscosity oils give thier grades in SAE values
 

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