by SD | Mar 21, 2011 | Default
TBN and oxidation Engine lubricants are generally used to reduce friction between moving parts within the interior engine. In addition to the lubricating function, motor oil also serves as a coolant, corrosion protector, and method of removing contaminants from the...
by SD | Mar 21, 2011 | Default
1At normal operating temperature, 212°F, a straight 30 grade oil has a viscosity of how many centiStokes? A. 3 B. 6 C. 10 D. 20 E. 30 [toggle title=’Answer:’]The correct answer is C- 10 cS.[/toggle] 2While racing at 95°F, mid-summer in Florida,...
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...
by SD | Mar 21, 2011 | Default
Chapter Five – It is more complicated than you thought. Engine oil today is much more than just the viscosity grade. For an introduction to engine oil, learning the viscosity grades and how they relate to each other is an excellent place to start. That is what...
by SD | Mar 21, 2011 | Default
Chapter Four – Conventional vs Synthetic Oils. So far, we have been talking about engine oils in a very general sense, focusing mostly on the viscosity/temperature relationship and how this has changed to include a complex mixture of base oils and viscosity...
by SD | Mar 21, 2011 | Default
Chapter Three – Viscosity Modifiers and Engine Oil. In chapter one we talked about how in the early days of the automobile, engine oils were very simple, basic refined fluids that helped keep moving parts easily sliding past each other. As time has passed,...