ill be the first to say it, sometimes cooler oil isnt always better. when you turbo a car, you should use a full synthetic as it is more difficult to break down. synthetic also lieks to be in a certain heat range for it to lubricate properly. also, if the oil is too cool runing thru the turbo, that could damage it too. i know it sounds odd, but tis true. what i would do if your concerned is just buy some header wrap and wrap up your exhaust components and maybe a little bit on your feed line to prevetn heat soak and you should be fine. i have been runing my car turbod for a couple months now, i freguently check the oil and it is not burnt at all and im just abotu do for it to be changed. just make sure you change your oil regularly and check it periodically and make sure it isnt low or burnt