On Saturday, June 16th 2012 I had a Stillen 19 row oil cooler installed by Shane and Adam at MAC Autosports (Parker, CO). Since this is my daily driver I decided to read a book and wait so that I could take a peek during different stages of the install (which they gladly allowed me to do). Throughout the day I was able to chat with quite a few customers whom all were very happy with their experience with this shop. Many were repeat customers that couldn't compliment the work performed more highly. Shane, Adam and Nick were all very friendly (as were Bill, the owner on previous occasions) and were more than happy to talk in detail about the install and in general about my Z. Both the oil cooler and the install costs were a lot less than I expected which was a big bonus.
I took some pictures of the install here
As it turned out the next two days the outside temperatures were 94 and 99 which gave me a good opportunity to test the effectiveness of the oil cooler. Normally these temps would kill the performance of my Z, especially from a stop. I am pleased to say that after a lot of spirited driving around the small airport roads close to where I live the oil cooler did greatly improve the performance of my NISMO in the heat. I was able to get the oil temperature up close to 230 but the drop off in performance was very minimal.
Nick (the tuner at MAC) informed me that an UpRev tune will can further increase the performance of the Z in the heat, and obviously in general. This makes sense to me since living at altitude the original program is more appropriate for sea-level. I only have 4000 miles left until the manufacturer warranty runs out which I plan on doing the UpRev tune and possibly going with a Fast Intentions cat-back and header install. I will of course have MAC Motorsports perform these as I am very pleased with their work.