Just got back in town after the weekend and will have to disagree with vettewars a bit on the use of sythetics in racing. Funny thing is, what got me hooked on Mobil-1 was they were the first and only 100% synthetic to receive certification for aviation by the FAA for use in the United States. About the same time (late 80's) I was AMA roadracing for Kawasaki and everyone was going synthetic, about a 50/50 split between Mobil-1 and Castrol. Since Castrol is actually a blend our team (and most others) had some issues and soon switched to Mobil-1. I also found Mobil-1 very prevalent in SCCA racing when I had my FIAT 124 EP cars, and virtually everyone used it at the 1995 La Carrera Pan Americana. That race represented over 150 praticipants from all over the world, pushing their cars to the limit for 6 days and 2100 miles from the southern border of Mexico to Nuevo Laredo. Seeing Mobil-1 on these front lines of autosport and aviation since it's introduction is the reason for my strong opinion of this product, in addition to the results I've seen in the agricultural/industrial field with the Delvac-1 fully synthetic diesel product. Not any other brand has been so consistently represented among a broader variety of vehicles and owners in my personal experience in almost 20 years. That's why I'm such a proponent of the product.

Now for back on topic stuff... I've got Mike's kit and can vouch that you can hear it over the PV2, but it's a nice sound you get really used to fast. I hear it a lot more now that I've got the Kumho Ecsta STX tires since they're so quiet. As for the power increase, I haven't dyno'd but the general impression of more "oomph" is noticeable. And Mike's workmanship is top-notch.