For the information of those who are interested Phillips Petroleum makes a 0W20 synthetic blend Phillips 66
. Why anyone would want it when you can get so many good 0W20 full synthetic oils I do not know.
Back in the old days before synthetic oils were readily available one company (ESSO I think) made a 0W(something) oil for use in the Arctic, I am told it was very successful and fairly widely used. I was in the Antarctic during that time and we could have used it but unfortunately didn't have it. Any engines left outside had to be heated before they were started or they would either not turn over at all or would shear the oil pump shaft or have some other catastrophic failure.