Any of those, there all very similar, same price range, research the data for each. I like 5W-40 now. I tried Nulon 10W-40 because a few recommended here and was cheap, it was in for 6000ks and came out with a red tint which means it had oxidised (not good), had a bit of blow by with it as well. Years and years ago I had a Nissan CA18 motor which would rev to 9000rpm, I had an oil change on it (I couldn't be bothered). The mechanic said he was going to put Valvoline it, I laughed thought he was joking, he assured me it was good it was new etc.
Anyway, I didn't argue he had just run a Nissan in a Bathurst 12hr category and came 3rd running this oil. So yea, Synpower it was made a massive difference to the car I had and once again has made a big difference to the XR, better fuel economy and no blow by, good temps, doesn't need snake oil additives either like a few other brands out there. Underrated in Australia, but the other 3 oils are pretty good too. 2c