Not until that long ago Pennzoil's web page was showing how it can clean engine better than Valvoline and Mobil1 by displaying oil bottles on top of pistons with PP being higher than the other two.
But Castrol which is a major brand was left out. Do you think Castrol does a better job at that and that's why it was left out? Pennzoil could easily squeeze 4 pistons in that image.
But Castrol which is a major brand was left out. Do you think Castrol does a better job at that and that's why it was left out? Pennzoil could easily squeeze 4 pistons in that image.