Posted by wisbaker on March 04, 2015 at 13:55:37 from (173.26.84.185):
In Reply to: NOS 5w 30 oil posted by Sammy in kansas on March 03, 2015 at 16:29:59:
Look on the can for the starburst or doughnut that will tell you what specification the oil originally met. The rating will be S(?). SA is non-detergent and made for cars made before 1930, SB before 1951, SC before 1967, SD before 1971, SE before 1979. SF, SG and SH are listed as obsolete but don't associate a date with them. SJ is for 2001 and older SL for 2004 and older SM 2010 and older and SN is the current rating. The API explanation for the SN is it offers better high temperature deposit control, less sludging and better seal compatibility as well as better compatibility with emission control components and ethanol fuels up to 85%.
Seriously the cans probably have more value as collector items especially that they're Skelly rather than a large national brand. I'd research their collector value as Petrolinia (gas/oil) collectibles are a strong market.
If you insist in using them in a car,truck tractor or other equipment do your research and match the rating to the age appropriate equipment (don't use old spec oil in stuff that requires a newer spec). But even then oil has come a long way Between my Wife, Daughter and myself we have 3 cars the "new" one has 105,000 miles, the old one 289,000- a lot of the longevity on newer cars is in part due to better oil, don't know that I'd want to use an older spec oil even in the old car and give up some of the enhanced protection it provides.
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