Quote:

I do run some 15 year old 15/40 Shell Rotella oil, I have like 10 gals still.



I'd be a little leery of using oil this old. The oil manufactures have said motor oil does have a shelf life of around 3-to-5 years, and that's if it's stored in perfect conditions, e.g., out of any direct sun light and in a area with moderate temps and no wide temp swings.

You may want to sample it and send it off for analysis before use. At the vary least, agitate it real well before use as additive settling does occur even with brand new oil.

For example: http://www.youtube.com/watch?v=rfW8W3sjbto - (Do yourself a favor and fast forward a minute into the video.)

UPDATE: I emailed Gary Rod at Shell Lubricants (SOPUS Products US) regarding motor oil shelf life and this is what he said word for word:

Quote:

"Our recommended shelf life on products that we sell is 5yrs. Therefore after that you are using it at your own risk." - Cited Email, Gary Rod, Shell Lubricants (SOPUS Products US) gary.rod@shell.com


Last edited by CompSyn; 03/08/12 08:46 PM.