Hello, which synthetic do you guys recommend for my 2011 F150 3.5 ecoboost? After reading up, I'm leaning toward Pennzoil, but which is of the two available (PUP or PP) is best? Both are similar in price. Or would Castrol Edge or another oil be a better option? I've read that Mobil 1 has had more issues with dilution recently? I live down in Texas if that makes any difference.