No,it isn't wine but it is the life blood of an internal combustion engine. I would rather change the oil at the interval that most fleet mangers recommend than buy a new engine. Oil doesn't disipate but it does get contaminated with dirt,water and gasoline etc. gm66
--- [EMAIL PROTECTED] wrote: From: "Clint Hooper" <[EMAIL PROTECTED]> To: "The Chevelle Mailing List" <[email protected]> Subject: Re: [Chevelle-list] Oil shelf Life Date: Fri, 14 Apr 2006 09:26:45 -0500 You worry about stuff too much,Dan. Motor oil isn't like fine wine. <g> FWIW,oil is tested. Look on the label and it will tell you the spec. However,the small synthetic companies often don't submit theirs for testing because of the high cost of doing so. Oil in a sealed container will probably outlive you. Clint Hooper H&H Custom,owner 1969 El Camino protourer 2001 H-D FLHR custom bagger http://dalesplace.com/misc/friends/clint/clint_hooper.htm/ "You may find me dead one day in a ditch. But by God,you'll find me in a pile of brass." ----- Original Message ----- From: "Dan Mascheck" <[EMAIL PROTECTED]> > Sounds great, but I'm also curious about many of the aftermarket synthetics. > There is Red line, Amsoil, Royal Purple that is big in my area, Lucas, and > others. How can you separate the bull from the fact! And again how long will > it last. If a year is all, then you may be getting bad oil even though the > bottle or can has never been opened! Hence is there a manufacture date on > the container? > There has to be someone that tests all oil and compares them! Looks like a > lot of smoke and mirrors! > Dan Mascheck > Wharton, TX _____________________________________________________________ Netscape. Just the Net You Need.

