castrol GTX.
always thought my mileage might be too high to switch over, also i don't want my stupid novi seal to give me any issues leaking.

I only use Valvoline in my car. Its all I have ever used in any of my cars as a matter of fact.

I use RP but I think any brand name synthetic changed on a regular basis will be fine .Chico(pops)

Mobile 1, I figure good enough for a corvette good enough for my GTP. And it is the best product on the market tryed and tested. They dont need to spend bull shit money on advertising. Dont know if u guys use additives, but I use a BG product called MOA, u can extend ur oil changes to 10000kms and BG will stand behind it. I have heard and seen some amazing shit with this product, helps keep internals clean. I know sounds like a sales pitch but I use it in my other GP that is a 475000kms so I trust it

10000 km = 6200 miles

not bad at all, over twice the normal duration