by SD | Mar 21, 2011 | Default
Chapter Ten – The Graduate I am going to bring up the constant flow pump concept. First, it goes back to the principal that doubling the pressure of the same grade oil does not exactly double the flow but it is close. Also doubling the RPM for the same reason...
by SD | Mar 21, 2011 | Default
Chapter Nine – Let’s start over. We have seen that 0W-30, 5W-30, 10W-30 and straight 30 grade oils all have the exact same viscosity at 212° and 302°F. What about startup viscosities? Do 0W-20, 0W-30 , and 0W-40 all have the same viscosity at a...
by SD | Mar 21, 2011 | Default
Chapter Eight – Odds and ends. I have some stories that I collected. First, my architect drives a big SUV. He was running with Mobil 1 brand 15W-50. He changed it to Pennzoil Multi-grade (mineral oil based, non-synthetic, cheap) 5W-20 at my suggestion. His gas...
by SD | Mar 21, 2011 | Default
Chapter Seven – What is the terminology from SAE and API? Many think that the “W” in 10W-30 means “winter”. Two series of viscosity grades are defined in Table (1): (a) those containing the letter W and (b) those without. Single viscosity grade oils with the...
by SD | Mar 21, 2011 | Default
Chapter Six – What Brand Should I use? Which Oil is best? By now if you’ve read the preceding 5 chapters – you may feel armed with enough basic knowledge to go out and start looking at different kinds of oil. Here you may come up with a common dilemma – which...