In about 1982 a friend of mine handed me a bottle of 0W30 motor oil and I didn't know what to make of it. He said he was told it was very good oil but I thought it would be thin. I can't remember the brand, but it had a rather plain label. Could have been Esso of Petro Canada. I am pretty sure it wasn't Amsoil. Anyone know when the first 0W30 oils were available and the brands?