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

[FrozenPilot]

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.....

 

[A Squared]

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

 

[jknight8907]

So, what about when you use, say, 15/50w? Is it just like a car, 15w when cold, 50w when at temperature?

 

[flydrummer]

So basically gas goes in gas tank and oil goes in crankcase. got it!:biggrin:

 

[NEFlyer]

We had a line guy here try to fuel a Citation XLS through the sh!t chute. That was his last day.

 

[A Squared]

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