Oil....is just oil. - Chevy and GMC Duramax Diesel Forum
Alternative Fuels - Diesel - Additives - Lubricants Discussion of diesel, its various additives, oils, lubricants and alternative fuels IE: Bio-Diesel ect...

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post #1 of 87 (permalink) Old 02-06-2020, 10:07 PM Thread Starter
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Oil....is just oil.

https://www.blackstone-labs.com/wp-c...Aug-17-ENG.pdf

Read this slowly and carefully.

Oil... is just oil.
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post #2 of 87 (permalink) Old 02-07-2020, 12:01 AM
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Real world data is just crazy talk and the mods need to shut this down ASAP.
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post #3 of 87 (permalink) Old 02-07-2020, 04:46 AM
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Quote:
Originally Posted by AlisoBob View Post
https://www.blackstone-labs.com/wp-c...Aug-17-ENG.pdf

Read this slowly and carefully.

Oil... is just oil.
I like it.

Only problem is that the fanboys will pick up on the small differences in the bar charts in that article and insist that the differences are meaningful. If the authors included the error bars (standard deviations) of the statistics in the bar charts we'd probably see that all those differences lie within a standard deviation of the overall average, which strongly indicates that those small differences are due to noise rather than anything structural in the data.

Then again...fanboys don't care about data. Forget what I said.

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post #4 of 87 (permalink) Old 02-07-2020, 04:48 AM
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Pretty sure that a lot of folks will not understand standard deviation but I agree with you.

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post #5 of 87 (permalink) Old 02-07-2020, 04:57 AM
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Pretty sure that a lot of folks will not understand standard deviation but I agree with you.
I got ten bucks that says it's easier to explain the concept of a standard deviation to a normal person than to explain to an Amsoil fanboy that the oil he pours through his valve cover isn't going to bring him (or his truck) eternal youth.
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post #6 of 87 (permalink) Old 02-07-2020, 05:36 AM
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waiting for a long winded rambling post from 666mydependsarefullofit.
I buy quality diesel oil thats on sale and use stockish style filter,,350k and still beating the daylights out of her.
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post #7 of 87 (permalink) Old 02-07-2020, 06:40 AM
 
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First of all I prefer to use cheaper oil and change it often,but I will not agree that all oil is equal.I have used lots of amsoil in the past and one thing that will not lie is operating temp.Especially trans and diff.Put amsoil in and watch those temps drop.Just saying that for what its worth...

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post #8 of 87 (permalink) Old 02-07-2020, 07:00 AM
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Quote:
Originally Posted by bimmer95 View Post
First of all I prefer to use cheaper oil and change it often,but I will not agree that all oil is equal.I have used lots of amsoil in the past and one thing that will not lie is operating temp.Especially trans and diff.Put amsoil in and watch those temps drop.Just saying that for what its worth...

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Okay, here we go.

There are multiple sources of heat dissipation in lubricated mechanical systems. Interfaces between metal components that experience mutual "sliding" (bearing races, cylinders and piston rings, etc.) are one source, and we use lubricants to reduce the coefficients of friction at those interfaces to reduce the shear stress experienced by the components; this has the (generally positive) side effect of reducing heat dissipation at those interfaces because less mechanical work must be done to overcome friction (any work done to overcome friction is dissipated as heat). The other source is work done on the lubricant itself; i.e., in a differential the ring gear is turning and continuously mixing the gear oil. The rate of heat dissipation from fluid shear is proportional to the shear stress in the fluid, which is proportional to the fluid's viscosity. Ergo, for the same velocity gradient (i.e., amount of "mixing," speed of the ring gear, etc.), less viscous fluids will dissipate less heat. At the same time, the amount of heat dissipation at metal-metal interfaces will likely increase with decreasing viscosity, but not necessarily in a mathematically well-behaved manner. In other words, send me a big fat check and I'll fire up my CFD/FEA software and sell you a dubious answer to a very complex question.

The point is, a simple temperature reading is not a useful test of the relative efficacy of any lubricant.
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post #9 of 87 (permalink) Old 02-07-2020, 07:01 AM
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Quote:
Originally Posted by ShopSpecialties View Post
Real world data is just crazy talk and the mods need to shut this down ASAP.
My RED dot is bigger than yours.

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post #10 of 87 (permalink) Old 02-07-2020, 07:14 AM
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I run Castrol GTX High Mileage in my gasser, with a Fram filter
I run Rotella T4 in the Sierra Cummins, with the gray Mopar filter
I for a good while was running Amsoil in the LML, but now I just put Rotella T6 in and call it good, with an Amsoil filter
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