Question about Either -
I have acquired an OS 40FP and Tower 40FP, both with diesel heads, along with a couple of gallons of fuel. Have no idea how old the fuel is, but both cans are full.
Engines are identical, just different trade names. Plan to build a twin plane.

From reading all of the posts, I understand the biggest problem, is Either evaporating from the fuel.
My questions -

1. Is this really a problem, if you use a little care in keeping the containers closed?

2. What symptoms to I look for, if the either ratio is too low?

3. Liquid either. ( Starting Fluid ) Just isn’t available. If I need to add either, are there any guidelines for adding either. ( How will I know when it needs more, or what to look for if too much is added.)

4. Every truck stop, has starting fluid in spray cans, and it is cheap.
Any ideas on how to recover it from the spray cans, and still have a little either left?

I haven’t checked at the drug stores to see if either can be purchased there, but have ruled that out. I’m sure it would be more trouble than it’s worth - if possible - and my bet - cheaper to just buy more fuel -

Unfortunately, there are no local experts on diesel, so I have no help.
Both engines are in near - new condition. Have seen one of them running on diesel, so have a least one benchmark to work from. The gentleman I bought the engine from, has moved away, and my expert is gone. Haven’t checked the other engine yet.

Thanks

LEM