Quote Originally Posted by sossol View Post
Isn't naptha a mix of other solvents?

Neil
That is a problem with a lot of products. It is difficult to know for sure exactly what you are getting with you buy products labeled as "you name it". Naphtha is just one example. Gasoline is another example. It is difficult to know for sure what is in it. You can buy fuel line or gasket material marketed for "gasoline", but then you never know what additives are in the gasoline.

I have an old Ford 860 farm tractor. It had a glass fuel sight bowl and screen with a cork gasket on the carburetor. The cork got old and crumbly. I got new "cork" from auto parts store. Made a new gasket. Ran the tractor for about a week, (not continuously . Then it sat for a week. Went out to use it one day, that gasket had swelled up and "oozed" itself out of place, spilling a whole tank of fuel on the ground. (Yes I neglected to close the fuel shut-off valve)

Went to the local Parker Hydraulics distributor. Told them I needed gasket material for modern gasoline. Made a new gasket. It worked for a couple of years. Went out just last week to make sure the tractor was in good working order for a predicted snow. Turned on the fuel shutoff and gasoline began spewing out of that fuel bowl. After 2-3 years that gasket material failed. So, what happened, was it just the wrong material that failed after a few years? Or did the gasoline formulation change?

Hard to know for sure. The search continues.