First of all, why aren't you considerany any particle balls? They will usually roll earlier for true heavy oil. Also give us some info about yourself, speed, revs, experience level, what shot you like to play. I have the ultimate inferno and have seen the other two mentioned balls thrown. I'd have to say from what i've seen the ultimate and animal are better on oil. The KI seems to be very longish, usually not what you want on oil. It's also going to depend how you drill the balls. But in order to make a recommendation we'd need more info on you.
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When all else fails, become a lefty