As to having to use a 134 spec oil, 134 was not invented yet, while the 3000 was being sold,
However there are companies selling a utf that meets and exceeds the original specs by using a modern 20-xxxwt base oil that far exceed the original spec.
303 technically can not be sold under the original spec. So there is a lot of misinformation out there. As 303 used a vicosity improver made out of whale oil, yes, the original formula is banned via the international treaty on whale harvesting. 303 as originally specd, will meet or exceed the original specifications for your for 3000.
