I look at bottles of oil whenever I go to the store. Many of the straight weights still have the SL rating. I have noticed that some of the marine and ATV oils still have the SJ rating. I guess since there is no emissions equipment on them, there is no need to worry about clogging up a cat. Something to remember also is that not all oils have zinc and some never did. Some have phosphated ash instead of zinc and it's been that way for years.
