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1992 300E
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35 Posts
Discussion Starter · #1 ·
Hello,
I am going to change the engine oil for the first time. This car is "new" for us ('92 E300) but it has 115K miles and I am wondering what to use? It is going to be Mobil 1 synthetic but I do not know if I should use 10-30, 10-40 or 20-50 becase of the mileage; Also, if you could recomend an oil filter. Thanks for your help.
 

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300E
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100 Posts
Mercedes, BMW, and Volvo like 15W-50 100% synthetic. But from what I hear, only use synthetic if synthetic was used from the start, because apparently synthetic oil will cause leaks because it has lower viscosity. Conventional oils are pretty advanced by now, there's really not much difference, as long as you change it every 3000 miles. I use Castrol High Mileage in my 300E [:D]
 

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E320 wagon
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953 Posts
Try to determine the current oil from records, if not follow the temperature chart in the manual. Unless your in a very hot or cold climate, 10-40 20-50 will work fine, remember these oils are made to get the best mileage and lubrication at start up.

They break down a bit quicker than single viscosity oils like a w 30 w 40 . If you haul a large load on hills at higher RPMs with a smaller engine regularly, w30 - w40 according to temp.
 

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95 E320 Cabriolet, 140K
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1,332 Posts
So Florida is a very hot climate. Either of these oils will work, escpeially since you've decided to use synthetic. Which is best?... there are lots of opinions. If you do a lot of long distance driving, 20W-50 would be my summer choice. If you drive short distances, go with the lower viscosities to help with startup and warmup.

Don't let the mileage fool you. Treat it like a low-mileage engine.

I do recommend using a fleece-type oil filter (but I don't think one is available for your engine) rather than the regular type. It's more expensive and is designed to trap more contaminants and stay with the engine longer, as with an engine that runs on synthetic. Otherwise, you should consider changing a regular oil filter every 6K when using synthetic.
 

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Various Rental Cars
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310 Posts
I would put 20W-50 if I lived in Florida.

My e420 gets 20W-50 in summer and 10W-40 in cold NE winter and it starts and runs great everytime.

car's been religiously maintained that way since new (have all the receipts). Since this is the best used car i've ever owned the other two are getting the same thing

The Porsche has 10-40 Castrol GTX now and same with the Ford Escort. I will definitely put 20W-50 in the Porsche in summer but not sure about the Ford...
 

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ML320E - 260E - 190D
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230 Posts
Hi!
Use Oil which one is best for your car - Mobile1 0W40
If your engine is burning - good luck - To heavy Oil no good - you are loosing power
and don't mean is good for that engine.
This Oil 0W40 - is the best Oil at this time and is recommended by MB.
This Oil out perform conventional Racing Oil 20W50.
Now we know what we are talking.Milege dont means nothing - how was used - this be the picture of your engine.

Regards
 

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1995 E320 WAGON
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46 Posts
Best thing is to consult the owners manual and ask the dealer. My E320 has 120k and it's had 15W-40 Pennzoil since day one. I'm the second owner and here on the virginia penninsula it gets pretty hot in the summer(high humidity)down to 27 degrees in the winter. No problems whatsoever.
 

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1986 Mercedes 420SEL
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194 Posts
My other car is a Lincoln Town Car which I bought some years back. I was showing 62,000 when I bought it. I've 5W-20 in it since day one. It now has 134,000 on it, I change the oil every 10,000 miles, and it doesn't use a single drop of oil between changes. I live in Florida where ir gets quite warm~!. I think that many of you would be quite shocked to know the weight of the oil used in NASCAR time trials of by European Gran Prix cars which see 17,000 RPM's regularly.
 

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My other car is a Lincoln Town Car which I bought some years back. I was showing 62,000 when I bought it. I've 5W-20 in it since day one. It now has 134,000 on it, I change the oil every 10,000 miles, and it doesn't use a single drop of oil between changes. I live in Florida where ir gets quite warm~!. I think that many of you would be quite shocked to know the weight of the oil used in NASCAR time trials of by European Gran Prix cars which see 17,000 RPM's regularly.
:eek:
 

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Buncha W124's
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2,359 Posts
15-year-old thread bump!! o_O

That's good to hear 5W-20 works in the Lincoln. But it doesn't mean 5W-20 is great for every Mercedes engine. I don't think MB has formally approved 5W-20 for any engine sold in USA (not sure though). Use the viscosity shown in the original owner's manual chart when the car was new, for the ambient temperatures where you live. 1994 owner's manual chart shown below.

NASCAR, Grand Prix, F1, or any other race car oils are completely irrelevant because those engines are torn down and rebuilt very often (sometimes after each race). Super-thin oils in use today are primarily to help mfr's meet ever-tightening government fuel economy requirements, NOT for engine longevity. YMMV, etc etc.

2667896
 

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2016 E350 wagon; 1994 E320 wagon
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the 1995 E300 is a diesel, is it not? I would be putting a diesel oil in it, like Delo400 15W40
 

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Buncha W124's
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2,359 Posts
the 1995 E300 is a diesel, is it not? I would be putting a diesel oil in it, like Delo400 15W40
The original poster has a 1992 300E, according to his profile. His "1992 E300" was a typo. There was never a 1992 E300. The naming convention changed to Exxx with the facelift as of USA 1994 model year, or roughly June 1993 manufacturing date.

The OP also doesn't list his location so we can't tell if he's in North America, but based on other posts he's probably in USA and hasn't logged into the forum in 15 years.

But anyway. His car has an M103 gasoline engine. Not a diesel.
 

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'95 E300 DIESEL, '91 600SEL, '92 600SEL
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18,301 Posts
Geez, another dreaded oil thread. What a way to wrap up the year.

For the W124, the only 2 applicable oil weights are 5W-40 for continual cold (0C/32F or below) climates and 15W-40 for year round in anything above freezing AND as long as it is diesel rated.

Don't matter if you've got a fleet manager special 200E or a 500E or anything in between.
 

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349 Posts
Geez, another dreaded oil thread. What a way to wrap up the year.

For the W124, the only 2 applicable oil weights are 5W-40 for continual cold (0C/32F or below) climates and 15W-40 for year round in anything above freezing AND as long as it is diesel rated.

Don't matter if you've got a fleet manager special 200E or a 500E or anything in between.
How about Mobil1 0W40?
 

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'95 E300 DIESEL, '91 600SEL, '92 600SEL
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18,301 Posts
Not for these pre-FSS cars.
 

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1986 Mercedes 420SEL
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194 Posts
Mercedes, BMW, and Volvo like 15W-50 100% synthetic. But from what I hear, only use synthetic if synthetic was used from the start, because apparently synthetic oil will cause leaks because it has lower viscosity. Conventional oils are pretty advanced by now, there's really not much difference, as long as you change it every 3000 miles. I use Castrol High Mileage in my 300E [:D]
The days of "paraffin based oil" are long gone. If any brand of decent multi-vis oil has been used and changed with some regularity, there won't be any sludge build abound the seals. The 'old wives tale' about switching from Dino to Synthetic is no longer valid. You must be one of the older guys who remember the days of 'Quaker State' when it was paraffinic based, also know as Pennsylvania grade~!
 

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Buncha W124's
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2,359 Posts
If you don't have to shoo penguins away from your vehicle before starting it, AND you are using synthetic, there is no reason to use 0W-anything. Or even 5W- for that matter. I use 10W-40 synthetic in all my 124's, the rated pour point is -49°F. On a tight budget get the M-1 10W-40 High Mileage stuff at Walmart in 5-qt jugs for ~$25, just don't attempt extended drain intervals (doesn't work well).

If using dino oil, then you need to be more concerned about it being thin enough in sub-freezing temps.

Remember this thread is in the W124 forum, and newer chassis/engines are a different discussion.
 
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