Right now I have a WIX 51773 oil cooler with a heatsink wrapped around it in the rear driver wheel well, I will probably move it and put my big oil cooler there, similar to what humble has done. Except, I don't really need the cooler unless I've been doing 80 MPH down the freeway for sometime and suddenly have to sit and idle, otherwise I never even see 220 degree oil, and I run synthetic, so I'm not terribly worried, but Summer is coming! The car already uses 7 quarts of oil, and adding a cooler will only make it hold more, an oil change costs over $50
and I do it myself and get a discount, crazy beetle...