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Old 10-03-2009, 03:01 AM
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Best motor oil to use in my 240d

Oil Change time and I would like to know what motor oil weight and type I should be using in my 1983 240D.

Consider that we will be going into the winter months and the weather will be getting colder.

The vehicle is garaged in the the northeastern part of the USA.

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Old 10-03-2009, 05:40 AM
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CD diesel rated HDEO like Delo 400, Delvac Super/MX or Rotella. Check BITOG for oil analysis done on MB diesels and you will find out how all oils hold up in the engine.
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Old 10-03-2009, 08:22 AM
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Premium Blue HD Diesel 15W40...

I just love an oil thread......almost as good as a fuel additive thread and the debate about algae in your fuel....

Good morning everyone, looks like it'll be great day!

62 W121 190DB - Original CA/AZ Car - Excellent Example
99 E300 Turbo Diesel - 362,000...Awesome Daily Driver
01 E320 Wagon - 297,xxx (wife's work car)
01 E320 Wagon - 131,000
02 Land Rover Disco SE- 110,000
87 BMW 325is (E30) Full Restore - Son's
06 Mini Cooper 'S' - Son's
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84 300D - 142,xxx :cool - "Sold"
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Old 10-03-2009, 08:46 AM
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Pick your poison

From what I've read...just about any diesel rated 5w40 synthetic or 15w40 dino is just fine for an older diesel. Synthetic may be preferable for cranking in cold weather.

The only other thing about oil is..."change it hot and often"

'Morning, guys
1982 240D, sold 9/17/2008
1987 300D Turbo
W124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
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Old 10-03-2009, 08:48 AM
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I use Mobile 1 5W40 (a little hard to find and a little more expensive) or Rotella "synthetic" 5W40 (cheaper and usually available at walmart). The advantage of 5W40 synthetic over 15W40 coventional oil is easier cold starting. Beyond that, any diesel oil with the correct range will work.
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Old 10-03-2009, 09:02 AM
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Redline 15W40. I change mine once per year. Redline recommends changing it every 10,000 - 16,000 miles or once per year.

1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
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Old 10-03-2009, 09:45 AM
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I was pointed to the rotella-t 15W-30 (or 40? I forget) comes in the gallon jugs with the picture of a big rig on the back. Also told 3,000 miles or 6 months for that. Synthetic will help you crank in the winter and can go for more miles, but not more time (from what I've heard). I only drive 3-6,00 miles a year anyway, so I stick with the conventional oil.
1983 240D 3.0T 4-speed manual, now sold

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Old 10-03-2009, 10:51 AM
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Like 'best' thread

Can some one explain to me why Synthetic will crank( help to crank ) better in the winter or in cold climate? Would the viscosity differs so much for synthetic and dino at low temp? All in the mind?

I like oill/ATF/PS fluid/Brake fluid thread as you have so many recommendations that you are spoiled with choices.. Any members against buying it in Walmart?

Changing it often is best.
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

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Last edited by ah-kay; 10-03-2009 at 10:55 AM. Reason: typo
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Old 10-03-2009, 10:59 AM
92 300D 2.5L OBK #59
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Location: Central FL
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5W-40 vs 15W-40. It has better cold weather flowability.

Make sure its New, Clean and proper grade (diesel rated) for your vehicle. Diesel oils are rated beginning with a C not S.

Check out this link:
Attached Files
File Type: pdf API_ratings.pdf (218.5 KB, 226 views)
92 300D 2.5L OM602 OBK #59
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Old 10-03-2009, 04:03 PM
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guys, what about for warmer climates, like so-cal?
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Old 10-03-2009, 04:08 PM
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Originally Posted by Sev View Post
guys, what about for warmer climates, like so-cal?
have no worries.....President Obama swears "If you like your gun, you can keep it
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Old 10-03-2009, 04:13 PM
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The best oil to use is the C-rated oil that you change hot every 3000 miles.

It really doesn't matter after that. Yes, 0W-40 is more suitable for colder climates, but 15W-40 should be fine for anywhere in the continental United States.
1992 300D 2.5T 249k - Parked with a bad transmission
1981 300SD 142k - Daily driver
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Old 10-03-2009, 04:20 PM
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guys what about DELO? That's what I normally put in because the Rotella is like $20 a gallon..

I had to go with Castrol Diesel Oil -_- I needed oil and didn't have enough money... It was $3.99...

But any who, Delo a good oil to use?
2007 BMW 328XI
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Old 10-03-2009, 04:24 PM
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Originally Posted by Scott98 View Post
Redline 15W40. I change mine once per year. Redline recommends changing it every 10,000 - 16,000 miles or once per year.

1981 300SD 512k OM603

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Old 10-03-2009, 04:55 PM
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Originally Posted by turbobenz View Post

Friends don't let friends change their oil in excess of 5,000 miles.

-Typos courtesy of my mobile phone.
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