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Oil weight and Oil Grade #5329059 01/21/20 07:11 PM
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Snagglefoot Offline OP
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Just for fun I am going to cut and paste some quotes from the main stream advertising media showing the terms weight and grade. Those numbers that the SAE (Society of Automotive Engineers) defines are actually grades such as SAE 30 but many sources call them "weights". The terms seem to be used pretty loosely. Standby.



Napa oil weight.PNG
From Napa Website

SAE grades.PNG
From Wiki on SAE

Valvoline ad.PNG
From Valvoline ad. Using the terms weight and grade in the same piece of information.

Popular Mechanics oil weight.PNG
Discussion of Oil Weight from Popular Mechanics article

Napa II oil weight.PNG
Oil weight and SAE mentioned in same ad

Last edited by Snagglefoot; 01/21/20 07:40 PM.

If you want the job done right......do it yourself.
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329063 01/21/20 07:15 PM
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LotI Offline
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Boooo!

Oils don’t come in weights! show me higher density with higher grades and I will concede!


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450 Cutaway
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Retired:
17 VW GTI
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Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329075 01/21/20 07:37 PM
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Snagglefoot Offline OP
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So there you have it folks. Grade is correct. Weight is a term that was used for many years and and is still kicked around, even by those who should know better.

That takes a weight (I mean grade) off my shoulders. LOL


If you want the job done right......do it yourself.
Re: Oil weight and Oil Grade [Re: LotI] #5329079 01/21/20 07:38 PM
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edhackett Offline
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Originally Posted by LotI
Boooo!

Oils don’t come in weights! show me higher density with higher grades and I will concede!

That's easy, just look at any product data sheet and you'll see increasing density with the higher grades.
Here's an example: VR1 PDS

Ed


Never attribute to engineers that into which politicians, lawyers, accountants, and marketeers have poked their fingers.
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329085 01/21/20 07:51 PM
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RDY4WAR Offline
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If you refer to oil viscosity by "weight", it's a dead giveaway of your knowledge on the subject. It's the same when people say "zinc" instead of ZDDP.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329088 01/21/20 07:55 PM
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tiger862 Offline
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The problem comes from the "W". People always assumed it was 5 weight when cold then a 30 weight once hot. When I try to explain grades and temps people get confused.


Tiger862
2018 Grand Caravan
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329104 01/21/20 08:14 PM
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RDY4WAR Offline
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The "w" stands for winter.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329108 01/21/20 08:19 PM
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blupupher Offline
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I use the terms interchangeably, but primarily use the term weight when talking about an oils viscosity.

there are other things to get more concerned over.


'18 Santa Fe: PP 10W-30/OEM
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'04 F150: Magnatec 10w-30/ST
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Re: Oil weight and Oil Grade [Re: RDY4WAR] #5329114 01/21/20 08:29 PM
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Imp4 Offline
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2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329115 01/21/20 08:29 PM
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JimPghPA Offline
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Unless you are in outer space where the effects of gravity are negligible, then we will call it mass, oh wait, that is weight, did I make the grade?


Boy will I be happy when ALL vehicles on public roads are autonomous.


JimPghPa

Re: Oil weight and Oil Grade [Re: RDY4WAR] #5329116 01/21/20 08:30 PM
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Mad_Hatter Offline
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Originally Posted by RDY4WAR
If you refer to oil viscosity by "weight", it's a dead giveaway of your knowledge on the subject. It's the same when people say "zinc" instead of ZDDP.

I wouldn't go that far..i find myself using "weight" or "zinc" on rare occasions despite being fairly knowledgeable abt lubricants. I know better but for some reason I do it...and it's not like this is my daytime job, so there's that.

Sometimes old habits die hard...😉

Re: Oil weight and Oil Grade [Re: blupupher] #5329118 01/21/20 08:31 PM
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Mad_Hatter Offline
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Originally Posted by blupupher
I use the terms interchangeably, but primarily use the term weight when talking about an oils viscosity.

there are other things to get more concerned over.

I've seen "weight" used on mfgs websites...so there's that. shrug

Re: Oil weight and Oil Grade [Re: Imp4] #5329120 01/21/20 08:32 PM
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RDY4WAR Offline
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Originally Posted by Imp4
Originally Posted by RDY4WAR
If you refer to oil viscosity by "weight", it's a dead giveaway of your knowledge on the subject.

Yeah, somebody needs to take Valvoline to school.


Somebody needs to stop being hookwinked by marketing mumbo jumbo.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Oil weight and Oil Grade [Re: RDY4WAR] #5329130 01/21/20 08:41 PM
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Imp4 Offline
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Originally Posted by RDY4WAR
Somebody needs to stop being hookwinked by marketing mumbo jumbo.

Hookwinked?!? ???


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Oil weight and Oil Grade [Re: Snagglefoot] #5329139 01/21/20 08:58 PM
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RDY4WAR Offline
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Marketing is heavily invested in public perception even when that perception is wrong. They are simply using "weight" in response to public misconception that oil viscosity is "weight." That's it.


"He who is without oil, shall throw the first rod." - Compressions 9:1
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