Talking oil viscosity OT, not really

[_shel_ny]

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Edited September 8, 2011 by shel_bizzy_48

[power_hungry]

20W50 has the viscosity of 20 at old temps, performs as 50W at high temps. I used 20w50 in my old Dodge van so it could maintain enough oil presure to keep the idiot light off in the summer.

[Captain Neon]

Found this statement on another site about oil.

Is it so, or has the guy been somkin something.

I thought 20W50 would be 50 cold, 20 when hot, but then I really don't know much anyway.

"when 5W30 is cold, ...the oil is 35 weight (5+30),...20 w 50 starts at 70 and warms up to 50"

A complete lack of understanding about multi-viscosity motor oil. Ignore him. "Power Hungry" is correct.

The prior explanation reminds me of a boss that I once had who claimed to be a trained chemist. He tried to explain to me that when an acid of pH 1 was added to an alkaline of pH 10 that I'd get a solution with pH 11.

Realising that my boss didn't have a clue, and that his chemist credentials were seriously in doubt, I just nodded my head, repeated what he said back in case I misunderstood, and stated, when he confirmed that I heard him corrrectly, "If you say so."

[greg g]

could we try to find out what he puts in his pipe????????????????

The w stands for "winter" Shel, as you are eminantly qualified you can contact the guy and explain winter to him.

[48mirage]

On a multiweight oil there are added elastomers. Think of the elastomers as coils that are tightly wound. As the oil comes up to temperature the coils unwind and give the oil the physical properties of a thicker oil. After multiple cycles the elastomers start to break, another reason to keep fresh oil in your motor.

[HalfdollarMayflower]

The guy added his name and credentials under the line that I pasted here, but I did not copy that info.

Credentials don't seem to mean as much as they used to. I just finished up a Master's degree at an institution that styles itself "the ivy league of the south", and have come to the realization that if you pay the money and don't rock the boat too much, you'll be rewarded with your 'credential'....bought & paid for.

I'm still amazed at some of the worthless nonsense that comes from 'credentialed' folk.

[Plymouthy Adams]

years ago they pushed stay in school and get the diploma..lots of folks could not attend past 9/10th grade so they pushed for the GED at a later date...so it seems that education with 12 grade ed. is common hat..so they pushed either a BA degree or military experience and for the longest time they meant abou the same..a committment where onw is a degree and the other an honorable discharge..playing field equal..now that is was on parr..they had to push the upper edge with a 4 year degree..more and more of them out there now and now the push is a doctorate..where will we go from there...

[james curl]

I do not know, I was trained as a Draftsman in highschool, started in the eighth grade through the 12 grade. Worked as a Draftsman, all the way from tracing old drawings to designing new systems on my on. Had to learn Auto Cad then Micro Station to keep on working. Then they started to require an AS Degree in Drafting to start, now most Universities have a degree in Applied Engineering Technology which is a BS degree in drafting and design.

[Normspeed]

I agree Shel, that guy's educated take on oil viscosity shows that he knows nothing about it. If he were a car, he would be blowing smoke:D