Prior to 1996, API had categories for "Energy Conserving I" and "Energy Conserving II." Beginning with API Service Category SJ in 1996, they only have one "Energy Conserving" category.
Here's the newest API-SL & ILSAC GF-3 Energy Conserving data on page 4 http://www.76lubricants.com/cmc_upload/EDITORIAL/0/000/017/869/tn3_4.pdf
Ken
[ March 13, 2003, 08:30 PM: Message edited by: Ken2 ]
