It would be interesting to see what an Amsoil/Polaris UOA would say about your fuel dilution. If still around 1-2%, you're one of the lucky EB owners; they use GC to measure, not "estimate" based on flash, or however BS "measures." I had low visc with Pennzoil too.. 8.2 at 6k, a bit higher (8.4) at 1k into next fill. And a tad of Ti, and a tad of Potassium. Tad = 1 ppm. It appears to me, Pennzoil Plat & Ultra VOA's show they start out with less visc than they claim, and then shear down after that...or maybe it's fuel dilution not true "shear," dunno. I will look for a Rotella UOA in an EB, but the advice to try Rotella Multi-vehicle, or Gas Truck is worth investigating. You don't think your SHO would be offended by using something called Gas Truck, do you? Somewhere in BITOG there is a chart showing Pennzoil, Rotella, QSUD virgin spec comparison.