Was it Formula Shell SM or SN with more Moly? I think they may have stayed consistent, and PYB was the product to get a boost of Moly into API SN > SM.
FWIW, I wouldn't use a HM oil in an engine less than 50,000 miles. That's just me, there are other viable options. I'd run Formula Shell for a 5,000 mile run or two, and then switch to your oil of choice(if you are sticking with one) afterward.