Well, here goes. Nearly all of today's modern base oils are paraffin based. Fact. Look it up. I don't use Pennzoil but I ended up with my son's car that had over 130K and drove it to 200K. Head gasket leaked at about 175K so pulled head. It was as clean as the day it was assembled. He used Pennzoil. Was not good about changing it. Some times went over 7k miles according to the stickers. Secret, he was on the road a lot. I have seen many, many engines full of sludge with all different brands of oil. Secret, they were used intermittently and with poor servicing on oil changes.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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