*sigh*...the origin of ST...
Exxon mostly supplies it here in the northeast with occasional WPP 5qt jugs during shortages.
From the Exxon MSDS:
Product Name: SUPER TECH 10w30
Product Description: Base Oil and Additives
Product Code: 477422-00, 97Z054
Intended Use: Engine oil
blah, blah, blah....
WPP makes all of the Blend 10W30 and Syn (at least here in the US). See one of my previous posts confirming that the blends (10W30) are still around and are SM/GF4. All of the 5W30 blends I have found are all still SL. I have only seen a few WM's carry the Full Syn 5W30 quarts (no 5 qt jugs) and they are SM rated.