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  #1  
Old 12-31-2001, 11:13 PM
mmbrown
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Delo vs 10-40 for GAS 126?

'having sold my trustworthy 240D and upgraded to the 420SEL, I have a few gallons of Delo lying around....

Should I a) donate the Delo to the new owner or b) use in the 420?

Thanks, and Happy New Year ~Mark Brown
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  #2  
Old 01-01-2002, 02:03 PM
Mike Murrell's Avatar
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Mark:

There are people who regularly use 15W-40 in gas engines. The back of the container tells the story. Does Delo carry a "gas" rating? As of late, gas oils are rated SJ and more recently SL. Diesel oils have a rating that begins with the letter C.

It all comes down to what you want to use long term. Some believe that you should pick a brand of oil and stick with it. Different brands affect things like seals.

A local MB independent mechanic I know swears by 10W-40 for the 420/560 SELs and the M103 motors as well.

A veteran mechanic by the name of Randy Durrance(used to post here) once said "the best oil is clean oil".
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  #3  
Old 01-01-2002, 02:35 PM
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Mark,

Mike's quote from Randy Durrance is spot on as is a quote from a gent out in Texas, Larry Bible, of "change it hot and often".

My particular favorite for all 3 of my gas vehicles is Chevron Delo 15W-40. I can find it at Walmart, reasonably priced and in gallon jugs. It came recommended to me and has been my favortie for several years. It has ratings for both diesel and gas.
http://library.cbest.chevron.com/lubes/compprd9.nsf/c88c682625e06af6882568db00737ce8/60df1bfc8e3634728825605b00476f29?OpenDocument

But I wouldn't get hung up too much on brand as I would on oil change frequency and proper viscosity for the weather. Mercedes now appears to not list brands in their supplemental as much (if at all) as they list approved API service categories and the good old temperature vs viscosity chart.
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2000 G500 LWB Obsedian Black
2005 Toyota Tacoma Access Cab Off Road Sport
1993 Volvo 240 Sedan Anthracite
1980 450SEL Champange (owned it for 15 years. Great car)
1986 280GE LWB Anthracite (Sold it and kinda wish I hadn't)
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  #4  
Old 01-01-2002, 11:44 PM
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Simply look at your owner's manual for which weight oil is to be used for expected temps. My nieghbor has a '91 Audi 100 and it calls for 15W-40 or 15W-50. I don't think there is an oil sold that has a rating less than SJ, including Delo 15W-40. One of the things I have noticed written on the back of heavy weight oils, is the words "provides superior protection". I don't find this on lesser weight oils like 10W-30 or 5W-30. Just a little interesting fact, one of those "Hmmmmmmmm" things.
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  #5  
Old 01-02-2002, 03:08 AM
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As you will see by looking at the bottle of Delo, It has two API ratings. SJ and CH-4. For those of you who are unfarmiliar with the API ratings system, The first letter of the rating classifies the type engine the oil is certified for, in this case, S = Spark ignition and C = Compression ignition. Basically, a C- rating means its a diesel oil, S- means the oil is OK for gasoline, Propane, and CNG.

Since Delo carries both (along with every diesel oil out there) it is OK to use in a gasoline engine, and usually preferred because it is derived from higher quality petroleum basestocks when compared to regular gasoline engine oils that only carry the SJ rating.

The delo will keep your gasoline engine running happy, and I wouldnt recommend anything else for your 420. It would be my first choice if I ran dino oil, but all my vehicles get Mobil Delvac-1, simply the finest synthetic oil available in the US.
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  #6  
Old 01-02-2002, 08:12 AM
LarryBible
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I have used Delo 15W40 Multigrade in piston engine on my place from diesel tractor, lawn mower, diesel Benz's, Ford farm truck, Wifes 4Runner, yada - yada - yada, for about 12 or 13 years. I only recently began using anything else, and that is Mobil One in my new C Class, it just made since. The engines that I have taken apart which have run this oil were absolutely spic and span inside.

The added detergents in the universal grades work great in any engine. The only oil you will find that will do a better job of keeping an engine clean is Mobil One for about twice the price.

My advice; get that gas engine to operating temperature, pull the plug and filter, let it drain awhile, replace the filter, drain plug and pour that great Delo lubricatin' juice in the crankcase.

Have a great day,
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  #7  
Old 01-02-2002, 10:27 AM
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"C" for "Commercial" and "S" for "Service"

I have posted this once before. For clarification, I post here one more time.

Actually the "C" in CH-4 stands for "Commercial" and the "S" in SJ stands for "Service". It is a misconception when "C" is referred to as "Compression" and "S" as "Spark."

See publication by API at

http://api-ep.api.org/filelibrary/ACF1E1.pdf

BTW, I do not understand why the 15W-40 oil is not used widely in the US. Maybe the manufactures want to squeeze out that 1 MPG for CAFE standards. I have travelled to many countries and 15W-40 was the most widely used oil, truly a universal oil.

This past May, I travelled to China and there are so many taxi. Out of my curiosity, I asked what motor oil they use twice, once in Beijing (North) and once in Shanghai (South). Both time, the drivers showed me the 4-L jug they carry in the trunk. It is a Chinese made (Great Wall brand) 15-W40 oil. They say that is about the only oil all cars use in China. He further said the more expensive cars use import oils (I saw ads from Castrol, Mobile, etc) all over the place.

I saw this in the VW TDI board. Apparently BMW is seeing excessive engine wear with their newly recommended 5W-30 synthetic oil (regardless of drain interval) so many dealers are going back to BMW's 15-W40 premium oil. Other than being the messenger here, I do not know much more as I do not own a BMW. But at one time, I seriously considered to acquire the BMW synthetic oil to use in my MBs as the price is about $3.60/qt. A couple years ago, it was a 5W-40 synthetic made by Vavoline and about a year ago, they switched to 5W-30.
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  #8  
Old 01-02-2002, 11:11 AM
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Here is the thread about premature wear using light oil.

http://forums.tdiclub.com/NonCGI/ultimatebb.php?ubb=get_topic&f=5&t=003595
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  #9  
Old 01-02-2002, 08:24 PM
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I agree with Bo, about the "squeezing" 1 mpg out of the engine. The big push for 5W-30 is for fuel economy only. To the normal person, what's 1 mpg better fuel economy. However you multiply the 1 mpg times the number of cars GM builds, it adds up. Many owner's manuals even list 5W-30 as only good for up to 60 f. only. My father-in-laws '93 Subaru says not to use 5W-30 for temps above 20 degs. Personally, I'll take superior long term protection over fuel economy.
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