[82SC]

yeah the heat sink grease is used to eliminate all air bubbles since air is a really bad heat dissipator...

some of the quality ones come in silver (dielectic spelling??) compunds with real silver in it...but it is expensive...and to do it for each new oil filter...look at overclocking sites because that is were it is used when chips are overclocked and produce copious amounts of heat....

they do have a double sided thermal tape that is supposed to be good too...eliminating air pockets...

can't imagine the cool collar does that much...you would need a fan to cool the fins...and even then...my cpu runs at 38C or 98F with the heat sink and a fan...but the oil is 160F or so...I would say my heat sink is 1/8 of the cool collar with 2 fans spinning at 5K RPM about 20 cfms and the cpu contact patch is about the size of a quarter...

but without the heat sink and fans the cpu can exceed 180F before they blow out....these chips run at an excess of 180F or 90C...and the heatsink fan combo brings it down to 98F...so it is effective...but the ratio of contact patch and heatsink area must be much greater....

I wonder what the vent on the side of the RUF yellow bird is for...it is right next to the oil filter area....was it for brake cooling, although I doubt rear brakes need excessive cooling....

but with a cool collar and a steady air stream the oil tmeperature could be brought down...I wonder is there is a way to do some ducting to get airflow to this area...and then right back out of the engine bay....hmmmm...

but by itself and in an enclosed engine compartment with no FRESH air supply I doubt the benfits are more then 2-5 degrees.