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Author Topic: Would You Use This Oil In Your Diesel Engne??  (Read 340 times)

May 20, 2018, 10:53:48 am

thomas m

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Would You Use This Oil In Your Diesel Engne??
« on: May 20, 2018, 10:53:48 am »
Open question here.

Would You Use This Oil In Your Diesel Engine??

https://mobiloil.com/en/motor-oils/mobil-1/mobil-1

Click the 15W-50 tab.

Just wanting to get reactions from the crowd.

Thanks


Thomas, Original owner since new:
1991 MK2 Jetta Non-turbo 1.6 diesel, Engine Code ME, 5 speed 020 AWY 04120 transmission, Hydraulic Lifters,
309,000 miles
Location: Vancouver, WA
LOOKING FOR REBUILD OPTIONS IN PORTLAND, OR OR ON THE WEST COAST

Reply #1May 20, 2018, 11:17:45 pm

ORCoaster

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #1 on: May 20, 2018, 11:17:45 pm »
NOPE!


My diesel is so old I would have leaks all over the place I fear.  Besides that I don't see where that oil is actually made for all the soot that is part of the diesel burn process.  The Rotella Diesel formula is what I use and buy when it goes on sale for 13 bucks a gallon locally.
Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

Reply #2May 21, 2018, 01:11:36 am

libbydiesel

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #2 on: May 21, 2018, 01:11:36 am »
I've switched many high mileage engines to synthetic and have never had it cause a single leak, ever.  I'm convinced that's a myth. 

It meets CF rating.  Would I use it?  It depends on which engine.  I have 5 vehicles with AHU and ALH engines and would not use it in any of those as it does not meet spec for them.  I have two other vehicles that it would meet the spec on ('79 rabbit, '85 gasser vanagon) and I'd be ok with using it in either of those. 
Use, abuse or ignorance of any information is at your own risk, confirmation or refutation is your own responsibility, no further 'proof' will be given, take it or leave it, YMMV,terms subject to change without notice, avoid contact with eyes or skin, contents known to cause cancer in California

Reply #3May 21, 2018, 02:52:19 am

Dakotakid

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #3 on: May 21, 2018, 02:52:19 am »
I'd use it if my neighbor had it and left his garage unlocked..................
Keep rocking, Comrade.
Thank you for the uranium deposits, Comrade Clintons.

Reply #4May 22, 2018, 04:19:04 pm

thomas m

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #4 on: May 22, 2018, 04:19:04 pm »
Quoted from the Mobil 1 data sheet:

"According to ExxonMobil, Mobil 1 15W-50 is of the following quality level:
    API  CF"

I'm not sure what "is of the following quality level" means, but it is a "CF" API designation.

To quote the API.org website, CF is an obsolete designation "Introduced in 1994. For off-road, indirect-injected and other diesel engines including those using fuel with over 0.5% weight sulfur. Can be used in place of CD oils."

So, it is a diesel rated oil. Whether it is too heavy for an old engine is a matter of opinion and experience.

My Delo 400 SAE 40W for diesel engines is rated API CF also.

« Last Edit: May 22, 2018, 06:52:54 pm by thomas m »
Thomas, Original owner since new:
1991 MK2 Jetta Non-turbo 1.6 diesel, Engine Code ME, 5 speed 020 AWY 04120 transmission, Hydraulic Lifters,
309,000 miles
Location: Vancouver, WA
LOOKING FOR REBUILD OPTIONS IN PORTLAND, OR OR ON THE WEST COAST

Reply #5May 22, 2018, 06:49:42 pm

libbydiesel

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #5 on: May 22, 2018, 06:49:42 pm »
15W-50 is fine for summer.  Your penguin avatar pic makes me wonder if it might be too heavy for at least some of the year where you are. 
Use, abuse or ignorance of any information is at your own risk, confirmation or refutation is your own responsibility, no further 'proof' will be given, take it or leave it, YMMV,terms subject to change without notice, avoid contact with eyes or skin, contents known to cause cancer in California

Reply #6May 22, 2018, 10:08:37 pm

ORCoaster

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #6 on: May 22, 2018, 10:08:37 pm »
Not too heavy of an oil.  It is only 15W and gives the protection of 50W   That is how I read that label.  Good to know it is diesel rated. 

And Yeah where did the sulfur in the diesel go?   Not up in smoke that is for sure. 

Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

Reply #7May 23, 2018, 07:44:12 am

theman53

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #7 on: May 23, 2018, 07:44:12 am »
15w when cold 50 when hot is how I read them.

Reply #8June 04, 2018, 08:28:37 pm

thomas m

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Re: Would You Use This Oil In Your Diesel Engne??
« Reply #8 on: June 04, 2018, 08:28:37 pm »
See this link or read below: this is Castrol's take on the viscosity numbers.


https://www.castrol.com/en_gb/united-kingdom/car-engine-oil/engine-oil-viscosity.html


How is Viscosity Measured?

The viscosity of oil changes with temperature, therefore multigrade oils were developed to provide protection across a range of operating temperatures.
The SAE (Society of Automotive Engineers) scale shows the viscosity of oil at both hot and cold temperatures. Thatís why the viscosity grade on the oil bottle is made up of two numbers.

Low temperatures

The first number followed by the letter W describes the viscosity of oil at low temperatures (the W stands for winter). The lower the number the thinner the oil.
A thinner oil at low temperatures is good because it flows more easily and is therefore able to protect the engine when it is first started from cold. If oil is too thick when cold, it will not circulate freely and will reduce fuel economy.

High temperatures

The second number describes how thick the oil is at the engineís normal operating temperature.
The higher the second number, the thicker the oil. If it's too thin when hot, it may not protect effectively. If it's too thick, you lose efficiency.

The correct viscosity grade will be displayed in your car handbook.

Thomas, Original owner since new:
1991 MK2 Jetta Non-turbo 1.6 diesel, Engine Code ME, 5 speed 020 AWY 04120 transmission, Hydraulic Lifters,
309,000 miles
Location: Vancouver, WA
LOOKING FOR REBUILD OPTIONS IN PORTLAND, OR OR ON THE WEST COAST

 

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