Originally Posted by DBxprss
FWIW, I use the Pennzoil Platinum synthetic oil and Purolator PureOne filters. PL10241 for the Focus.
I haven't felt the need to step up to the Pennzoil Ultra yet. I'm sure it's great oil, but I'm not sure what I would be gaining. I plan to stay with the recommended 5000 mile changes on the Focus, as I did with my 2011 Fiesta.
I also have a 96 Saturn that gets the same treatment (PL20195 filter), but I have been running 7500 mile change intervals on that one, with occasional oil analysis to keep an eye on things. So far there are 134,000 miles on the Saturn with very little oil consumption. A quart or less between changes. That's significant, because Saturns are notorious for being oil burners.
Pennzoil Ultra is believed to be blended using "gas-to-liquid" (I.e. Natural gas is the source) base stocks rather than crude oil which is the base for most synthetics sold here, including Pennzoil Platinum. As a consequence, Ultra has much lower Noack volatility (losing volume through evaporation at high temps) than Pennzoil Platinum, Mobil 1, etc. This makes Ultra a really good choice for DI engines, especially as a 5 quart jug is only $ 3 or so more at the Wal-mart of your choice.