CarbonSteel
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And here is Mobil's response:
From: Leblanc, Luc R [mailto:[email protected]] On Behalf Of TSC Americas /SM
Sent: Tuesday, June 21, 2016 14:33
To:
Subject: RE: Lubricants: Technical Question (LRL)
Hello 2015_PSD,
I think you can appreciate the fact this is not an exact science, and many factors contribute to oil life. Lubricants don’t begin to breakdown at set temperatures, but their degradation accelerates at different rates.
The condition of the oil (presence of water, wear metals, previous oxidation) when it is exposed to those elevated temperatures will have an effect on thermal breakdown. So “max temperature” for an oil is a moving target, and educated guesswork.
With all that being said, as far as rules of thumb go, premium minerals @ 240-250°F, and synthetics @ 280-300°F typically deliver an acceptable service life. But that is simply from an oil life/condition standpoint – one needs to consider if the oils keep adequate viscosity for proper lubrication and protection at those elevated temps. No concerns if Ford considers your 249°F as normal, but seeing much higher than 260°F would likely signal a problem has occurred or is imminent.
I’ll leave you with this image below of mineral vs synthetic. I know which one I would want in my engine.
Best regards,
Luc LeBlanc
Americas Technical Help Desk
ExxonMobil Products Technology
ExxonMobil Business Support Centre Canada ULC
Email: [email protected]
US: 1.800.662.4525 (Fax: 1.262.313.2316)
Canada: 1.800.268.3183
Visit www.mobilindustrial.com for information on our products, services, and new product selector, Looble.
The information contained in this email may be confidential and may also contain privileged attorney-client information or work product. The information is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this information in error, please notify us by phone immediately. Thank you.
From:
Sent: Tuesday, June 21, 2016 2:13 PM
To: TSC Americas /SM
Subject: Lubricants: Technical Question (LRL)
The following inquiry was sent through: ExxonMobil
Brand: ExxonMobil
First Name:
Last Name:
Position Title:
E-mail:
Company:
Address:
Country:
Phone:
Fax:
Current Customer: Yes
Question:
Can you tell me what the maximum operating temperature would be for the oils listed below? I realize there is a flashpoint temperature on the PDS, but I am wondering how hot the oil can be before it begins to breakdown and lose effectiveness/cause varnish and sludge. Case in point, I had some sustained oil temperatures in my Ford F-250 Powerstroke 6.7L that were 230°F to 249°F with ambient air temperatures of 115°F. Had I been towing, I am going to assume, I would see temperatures in the 260°F range. I am attempting to make a decision between synthetic and conventional oil for this application/operating conditions and would appreciate your advice.
Oil #1 – Mobil Delvac 1 ESP 5W-40 full synthetic
Oil #2 – Mobil Delvac 1300 15W-40 conventional
Thanks in advance for your help and advice.
From: Leblanc, Luc R [mailto:[email protected]] On Behalf Of TSC Americas /SM
Sent: Tuesday, June 21, 2016 14:33
To:
Subject: RE: Lubricants: Technical Question (LRL)
Hello 2015_PSD,
I think you can appreciate the fact this is not an exact science, and many factors contribute to oil life. Lubricants don’t begin to breakdown at set temperatures, but their degradation accelerates at different rates.
The condition of the oil (presence of water, wear metals, previous oxidation) when it is exposed to those elevated temperatures will have an effect on thermal breakdown. So “max temperature” for an oil is a moving target, and educated guesswork.
With all that being said, as far as rules of thumb go, premium minerals @ 240-250°F, and synthetics @ 280-300°F typically deliver an acceptable service life. But that is simply from an oil life/condition standpoint – one needs to consider if the oils keep adequate viscosity for proper lubrication and protection at those elevated temps. No concerns if Ford considers your 249°F as normal, but seeing much higher than 260°F would likely signal a problem has occurred or is imminent.
I’ll leave you with this image below of mineral vs synthetic. I know which one I would want in my engine.
Best regards,
Luc LeBlanc
Americas Technical Help Desk
ExxonMobil Products Technology
ExxonMobil Business Support Centre Canada ULC
Email: [email protected]
US: 1.800.662.4525 (Fax: 1.262.313.2316)
Canada: 1.800.268.3183
Visit www.mobilindustrial.com for information on our products, services, and new product selector, Looble.
The information contained in this email may be confidential and may also contain privileged attorney-client information or work product. The information is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this information in error, please notify us by phone immediately. Thank you.
From:
Sent: Tuesday, June 21, 2016 2:13 PM
To: TSC Americas /SM
Subject: Lubricants: Technical Question (LRL)
The following inquiry was sent through: ExxonMobil
Brand: ExxonMobil
First Name:
Last Name:
Position Title:
E-mail:
Company:
Address:
Country:
Phone:
Fax:
Current Customer: Yes
Question:
Can you tell me what the maximum operating temperature would be for the oils listed below? I realize there is a flashpoint temperature on the PDS, but I am wondering how hot the oil can be before it begins to breakdown and lose effectiveness/cause varnish and sludge. Case in point, I had some sustained oil temperatures in my Ford F-250 Powerstroke 6.7L that were 230°F to 249°F with ambient air temperatures of 115°F. Had I been towing, I am going to assume, I would see temperatures in the 260°F range. I am attempting to make a decision between synthetic and conventional oil for this application/operating conditions and would appreciate your advice.
Oil #1 – Mobil Delvac 1 ESP 5W-40 full synthetic
Oil #2 – Mobil Delvac 1300 15W-40 conventional
Thanks in advance for your help and advice.