its a double edged sword.
pay up for bayer primo that is pharma grade and pay up the ass and have a hurt ass from injecting that motor oil.
or take a chance on UG and not know if you are really injecting primo.
and as others have said just cause the UG was good to you in the past, doesn't mean all batches are well dosed. who is to say they didn't go downhill since your last ordered or changed owners, or changed the bathtub they were making the gear in lol