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#4450044 - 07/05/17 03:35 AM Diesel oil in gasoline cars
WyrTwister Offline


Registered: 01/13/13
Posts: 1504
Loc: Texas
Looking at a sale flyer from a local parts store . Noticed the " diesel engine oils " . What would happen if you ran it in a gasoline engine ?

Thanks ,
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Wyr
God bless

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#4450046 - 07/05/17 03:41 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
There is a starburst on the container. It will have a CJ-4 or CK-4 rating for diesel.

It will also have a /SM or /SN rating if it is compatible for gasoline engines. (Example: CK-4/SN)

The new CK-4/SN oils promise superior lubrication to the older CJ-4/SM rated oils.

It depends on your specific manufacturer recommendation but typically HDEO (heavy diesel engine oils) are fine for gasoline engines except they are of higher viscosity than gasoline motor oils nowadays which are trending towards 0W-20's for fuel economy.


Edited by ArcticDriver (07/05/17 03:54 AM)
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#4450050 - 07/05/17 04:11 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2378
Loc: Balearic Islands , Spain
It needs to have a Gasoline engine rating : SL/SM/SN...
Many people run Disesl a.k.a HDEO's ( Heavy Duty engine oils ) such as Shell Rotella or Chevron Delo 400 in older flat tappet camshaft engines due to their higher ZDDP concentration, they also usually are higher in sulphated ash content.
If you have a modern roller camshaft engine there is really no benefit against a quality PCMO ( Passenger car motor oil ).
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4450053 - 07/05/17 04:16 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
Kamele0N Offline


Registered: 02/09/15
Posts: 2038
Loc: Slovenia
Originally Posted By: WyrTwister
What would happen if you ran it in a gasoline engine ?

Thanks ,


Nothing would happen...you will be driving your car as before smile
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2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD various 10w40

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#4450078 - 07/05/17 06:25 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
I mistakenly called HDEO by the wrong name...it is an abbreviation for Heavy Duty Engine Oils.

Sorry, it was late at night.
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Multiple Diesel and Gasoline vehicles

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#4450110 - 07/05/17 07:22 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
TinyVoices Offline


Registered: 09/12/16
Posts: 480
Loc: Vienna, VA
Nothing will happen. Thousands and thousands of people do this. Google "turbo Subaru oil" and you will see most people run Rotella T6.
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1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 126k miles - Valvoline Max Life 5w30

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#4450156 - 07/05/17 08:22 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2552
Loc: MN
Since diesel oils are strong on soot dispersancy, it might not be a bad idea to pick an oil rated for diesel engines in gasoline engines. (Of course make sure it says SN or SM amongst all the diesel engine ratings.)

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#4450159 - 07/05/17 08:24 AM Re: Diesel oil in gasoline cars [Re: TinyVoices]
RLS Offline


Registered: 02/03/17
Posts: 25
Loc: Tennessee
The biggest problem with running diesel oil in cars and pickups is the phosphorus content is to high. It may kill the cats. We had this issue in our fleet when we tried to run 15w-40 in all our vehicles, high cat failures. When we went to running the proper spec. oil in every thing, cat failures when way down.
Just saying.........
I know that most Chevron and most Mobil diesel oils have lower Phosphorus amounts. They also carry the SN rating. A easy way to check is if Ford approved it for their 6.7L, I would not put it in a new car engine.

Just saying........
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Current Competitive shooter and trainer.

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#4450160 - 07/05/17 08:25 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
46Harry Offline


Registered: 01/08/12
Posts: 407
Loc: hawthorne, Ca.
I've been using Chevron Delo 400 15W-40 in my old Studebaker V8 engines since 1980 when we started operating our trucks. As long as the oil has a gas engine rating, it's good to use in both gasoline and diesel engines.

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#4450201 - 07/05/17 09:16 AM Re: Diesel oil in gasoline cars [Re: RLS]
salesrep Offline


Registered: 08/22/03
Posts: 3600
Loc: lllinois
Originally Posted By: RLS
The biggest problem with running diesel oil in cars and pickups is the phosphorus content is to high. It may kill the cats. We had this issue in our fleet when we tried to run 15w-40 in all our vehicles, high cat failures. When we went to running the proper spec. oil in every thing, cat failures when way down.
Just saying.........
I know that most Chevron and most Mobil diesel oils have lower Phosphorus amounts. They also carry the SN rating. A easy way to check is if Ford approved it for their 6.7L, I would not put it in a new car engine.

Just saying........


What he said.
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High quality Specialized Lubricants pay for themselves!

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#4450243 - 07/05/17 10:00 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
Panzerman Offline


Registered: 12/16/06
Posts: 4203
Loc: Port Orange, Florida
As long as it has the SM/SN rating it should be Cat safe.
With so many good deals on Gasoline specific oils, I just go with them. I use diesel rated oil in all my small engines though Generators, pumps etc.. I believe it is tougher oil.
Alot of diesel oil was made for mixed fleets and as a one use oil. It's all my Dad used.
15w40 for everything that took oil with no issues.
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2006 Dodge Ram 2500 Hemi 4x4
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#4450252 - 07/05/17 10:09 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
1993 Ford Ranger - 284,000 miles
1995 Chevy K3500 - 271,000 miles
Both still running great, no sludge inside at all.
always, always always on the cheapest 15W-40 available.

What happens if you use "diesel" oil?
Your engines last a half million miles, LOL!
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4450276 - 07/05/17 10:29 AM Re: Diesel oil in gasoline cars [Re: WyrTwister]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2378
Loc: Balearic Islands , Spain
It is true that 15W-40 HDEOs are usually very stout oils and can be bought for very cheap if you know where you're looking ( specially if you buy in bulk ).
I am considering switching both my cars to Shell Rimula R4X 15W-40 which is a SL/CI-4 HDEO which i can get for really cheap online, instead of the 20W-50 i am using in both currently.
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4450410 - 07/05/17 12:56 PM Re: Diesel oil in gasoline cars [Re: RLS]
TiredTrucker Offline


Registered: 01/04/08
Posts: 3226
Loc: Central Iowa
Originally Posted By: RLS
The biggest problem with running diesel oil in cars and pickups is the phosphorus content is to high. It may kill the cats. We had this issue in our fleet when we tried to run 15w-40 in all our vehicles, high cat failures. When we went to running the proper spec. oil in every thing, cat failures when way down.
Just saying.........
I know that most Chevron and most Mobil diesel oils have lower Phosphorus amounts. They also carry the SN rating. A easy way to check is if Ford approved it for their 6.7L, I would not put it in a new car engine.

Just saying........


That is the beauty of living in a state that doesn't check emissions or any other kind of vehicle inspection mandates. Cats fail? Who cares. But that being said, I use a conventional gasoline oil that has comparable phosphorus as many current HD oils in my 2006 Cadillac and it hasn't lost a cat yet.
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Freedom is not about having the choice to do what you want, but the choice to do what you ought.

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#4450413 - 07/05/17 01:02 PM Re: Diesel oil in gasoline cars [Re: TiredTrucker]
mightymousetech Offline


Registered: 04/03/17
Posts: 1444
Loc: Ontario, Canada
Originally Posted By: TiredTrucker
Originally Posted By: RLS
The biggest problem with running diesel oil in cars and pickups is the phosphorus content is to high. It may kill the cats. We had this issue in our fleet when we tried to run 15w-40 in all our vehicles, high cat failures. When we went to running the proper spec. oil in every thing, cat failures when way down.
Just saying.........
I know that most Chevron and most Mobil diesel oils have lower Phosphorus amounts. They also carry the SN rating. A easy way to check is if Ford approved it for their 6.7L, I would not put it in a new car engine.

Just saying........


That is the beauty of living in a state that doesn't check emissions or any other kind of vehicle inspection mandates. Cats fail? Who cares. But that being said, I use a conventional gasoline oil that has comparable phosphorus as many current HD oils in my 2006 Cadillac and it hasn't lost a cat yet.


Quite often when the cat fails, it completely melts down and turns into a solid lump, completely blocking the exhaust and leaving you stranded. They can also get hot enough the vehicle can catch fire.

Many vehicles will also get reversion in the exhaust and suck the cat material back in through the exhaust valves. Engine does not live long after that.


Edited by mightymousetech (07/05/17 01:03 PM)
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