| [GMCnet] Synthetic oil. Just some thoughts [message #282795] |
Wed, 22 July 2015 10:15  |
fbhtxak
Messages: 191
Registered: April 2006
Karma: 0
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Senior Member |
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Rob,
Two different-labeled oils with the same API "donut" are refined to the same
specifications. And "both would lubricate your engine the same".
Any difference in chemistry of API spec oils is at the margins.
National/international refiners and marketers, in an effort to differentiate
themselves from one another, claim that certain proprietary additives to the
API spec product make their product superior to their competition. There is
no credible documentary evidence to support such claims over regular API
spec oils.
Re the old Castrol commercial, "oils ain't oils", there IS a lot of cheap,
poor quality oil in the marketplace. None of that can be labeled with the
API "donut". That, then, is why it is vitally important to "look for
the...label". Here is a link that defines the API quality labels (be sure to
click on "API Motor Oil Guide" in red in the link):
http://www.api.org/oil-and-natural-gas-overview/fuels-and-refining/engine-oi
l/look_for_the_products_that_carry_the_api_quality_marks
Fred
Fred B. Hudspeth
1978 Royale - Tyler, TX
1982 Airstream Excella 28' Mh - Cooper Landing, Alaska
Date: Wed, 22 Jul 2015 23:12:18 +1000
From: "Robert Mueller"
To:
Subject: Re: [GMCnet] Synthetic oil. Just some thoughts
Message-ID:
Content-Type: text/plain; charset="us-ascii"
Fred,
After reading your email I came to the conclusion that if two oils have the
same API "donut" and are the same API Service
Classification would the have the same "chemical" makeup or could one be
superior to the other.
It seems to me that if they both were the same both would lubricate your
engine the same.
Or was the old ad correct "oils ain't oils."
Regards,
Rob M.
The Pedantic Mechanic
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| Re: [GMCnet] Synthetic oil. Just some thoughts [message #282797 is a reply to message #282795] |
Wed, 22 July 2015 10:26  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Hi Fred
I agree with what you are saying about the API but
Isn't the API class a minimum specification? That is that two different oils might have one just meeting the spec and perhaps the other one exceeding the requirements of the spec?
Differences might be heat tolerance, viscosity stability,, etc.
Are you in Alaska for the summer?
Emery Stora
> On Jul 22, 2015, at 9:15 AM, Fred Hudspeth wrote:
>
> Rob,
>
> Two different-labeled oils with the same API "donut" are refined to the same
> specifications. And "both would lubricate your engine the same".
>
> Any difference in chemistry of API spec oils is at the margins.
> National/international refiners and marketers, in an effort to differentiate
> themselves from one another, claim that certain proprietary additives to the
> API spec product make their product superior to their competition. There is
> no credible documentary evidence to support such claims over regular API
> spec oils.
>
> Re the old Castrol commercial, "oils ain't oils", there IS a lot of cheap,
> poor quality oil in the marketplace. None of that can be labeled with the
> API "donut". That, then, is why it is vitally important to "look for
> the...label". Here is a link that defines the API quality labels (be sure to
> click on "API Motor Oil Guide" in red in the link):
> http://www.api.org/oil-and-natural-gas-overview/fuels-and-refining/engine-oi
> l/look_for_the_products_that_carry_the_api_quality_marks
>
> Fred
>
>
> Fred B. Hudspeth
> 1978 Royale - Tyler, TX
> 1982 Airstream Excella 28' Mh - Cooper Landing, Alaska
>
> Date: Wed, 22 Jul 2015 23:12:18 +1000
> From: "Robert Mueller"
> To:
> Subject: Re: [GMCnet] Synthetic oil. Just some thoughts
> Message-ID:
> Content-Type: text/plain; charset="us-ascii"
>
> Fred,
>
> After reading your email I came to the conclusion that if two oils have the
> same API "donut" and are the same API Service
> Classification would the have the same "chemical" makeup or could one be
> superior to the other.
>
> It seems to me that if they both were the same both would lubricate your
> engine the same.
>
> Or was the old ad correct "oils ain't oils."
>
> Regards,
> Rob M.
> The Pedantic Mechanic
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Synthetic oil. Just some thoughts [message #282830 is a reply to message #282795] |
Wed, 22 July 2015 13:53 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Fred,
Looks like I GUESSED correctly! ;-)
Unfortunately I did not ask the question 100% correctly and would like to add:
Continuing the "logic" would you say that either a dino or synthetic oil that were the same viscosity (say 15W-40) and met the same
API spec would also "lubricate the engine the same?"
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: Fred Hudspeth
Rob,
Two different-labeled oils with the same API "donut" are refined to the same
specifications. And "both would lubricate your engine the same".
Any difference in chemistry of API spec oils is at the margins.
National/international refiners and marketers, in an effort to differentiate
themselves from one another, claim that certain proprietary additives to the
API spec product make their product superior to their competition. There is
no credible documentary evidence to support such claims over regular API
spec oils.
Re the old Castrol commercial, "oils ain't oils", there IS a lot of cheap,
poor quality oil in the marketplace. None of that can be labeled with the
API "donut". That, then, is why it is vitally important to "look for
the...label". Here is a link that defines the API quality labels (be sure to
click on "API Motor Oil Guide" in red in the link):
http://www.api.org/oil-and-natural-gas-overview/fuels-and-refining/engine-oi
l/look_for_the_products_that_carry_the_api_quality_marks
Fred
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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