TUH! Bullcrap. Regular Pennzoil, Pennzoil Silver, Pennzoil ULTIMATE, Pennzoil Ultra Platinum, Pennzoil High Mileage, Pennzoil Full Synthetic, Pennzoil Gold Synthetic Blend, Pennzoil High Mileage Full Synthetic. <--that's just ONE manufacturer's products off the top of my head.
Similarly: Playtex, Playtex pearl, Playtex sport, <--As a male, I honestly don't know more than this.
That's what I'm saying, you tell her you want Pennzoil full synthetic and she tells you she wants O.B. Fleur normal and you go find that for each other and everyone's happy. She'll know her shit just as you know yours.
Similarly: Playtex, Playtex pearl, Playtex sport, <--As a male, I honestly don't know more than this.