Depends on weight and/or type. Conventional down here in NH, USA is prob Mobil (given that its packaged in that same supertech/mobil clean 5K bottle). Thern Ive heard Nippon and or Idemitsu for the 0w-20 stuff originally, but, now Mobil after the rollout. All speculation - though that unique EoM bottle shape is a dead givavway (not the OP's bottle, that looks like Irving or ??)