A recent Google search for: "putting an oil cooler on polaris hawkeye worth it"

No. After 2000 miles I can honestly say you won't need it. Unless maybe you're slowly pulling trailer loads of rocks in the Sahara Desert. I've hauled many cord of firewood at close to 90 degrees and never had the faintest indication that the engine or oil was getting too hot. The cooling system that comes on it stock seems to be plenty sufficient for the job. If anything, sometimes it acts as if it's running too cool!