Suppose the simple answer is yes. Doenst move any oil, no leaks at all. Only trouble is finding diesel synth around here. But wonder if it best to continue to use dino as the engine has never seen synth. Quick starting too.

Wally world has it. I don't anyone has switched back yet

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I switched to Mobil 1 after 181K miles (now have 233K). My crankseal leak continues to improve (seep less and less and less) and the top end looks sooooo much better. Every time I take the valve cover off to do a valve adjustment and look at the valve train and I'm all smiles.

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~shell
As of 2/2010:
2001 CLK55 0o\=*=/o0
13.6 @ 106mph
10K mi
1984 300SD
260K mi and going and going...
97 S600
46K miles
1991 Sentra SE-R (extremely dorked with)
www.se-r.net

Wow, I ran synthetic in another car with some minor leaks, and man that synth sure finds them! Still use in in my soemwhat leaky Tahoe ( winter truck). Those cars weren't self-healing like the MBz is though! Off to Wally World, but not many diesel drivers up here yet. I swear I didnt see it there.

THNX folks!

EDIT: geez $48 for two jugs!! I'm taking this change to 7000 miles.

I am a big Mobil 1 synthetic fan, I use all of it! motor oil, ATF, grease. Mobil 1 has two diesel synthetic oils; Mobil 1 synthetic turbo diesel truck and synthetic heavy duty diesel 5-40w. Wal Mart has these? I know Auotzone does at $6.72/qt, which oil is better?

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification

Theres no reason not to. If it starts leaking, fix the leaks. Synthetic oil is better for the engine and has a much greater oil change interval than mineral.

Use synthetic. If it leaks, that means it was already leaking but oil sludge plugged the hole and synthetic cleaned it out.

The benefits far outweigh the risks with switching to synthetic oil.

to use the synthetic during the summer. I figgure that for 4 months I can deal with dino oil and then when I need a lighter and easier starting oil in the winter I will just switch when temps get cold .

$44.00 for 9 qts Mobil TD 5w-40 vs. $22.00 for 2 gallons Shell Rotella 15w-40.
Hmmm. lets see now....I didnt experience any benefits spending 2x as much for synth in the summer. The winter is a totally different story.

I put the 22 bucks I saved into the Sirius Radio and new speakers!

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1984 300D

You should pick a brand and type of oil and stick with it. Changing types and brands frequently may cause conflict with the additive packages of the two oils and reduce it's effectiveness.

http://www.whnet.com/4x4/oil.html

Also, this link is a interesting read an Synthetic oils

http://www.performanceoilnews.com/oils_against_oils.shtml

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1984 300D

most walmarts don't carry the M1 5W40TD&T oil. the bigger stores do usually. I have 4 walmarts near me, only the big one has it in stock. and of all the M1 oils they carry, only the TD&T oil is in the 4 quart jug. all the others are in 5 quart jugs...
if you just want to try some synthetic, Rotella in the blue jug is a group 3 synthetic (means it's not 100% synthetic) and it's only around 16.00 per gallon.
advance auto just dumped all their TD&T oil for 4.00/quart... I got 12 quarts of it. no idea if they will be stocking it or not.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

vstech, just checked my local Advance they have the 5w40 Mobil 1 Turbo Diesel Truck synthetic for $5.24/qt, Autozone has it for $6.19/qt. What is up? Is Mobil getting ready to reformulate? Maybe a 15w40 synthetic like Amsoil? Is there a Mobil 1 Delvac 15w40 synthetic?

__________________
1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification

You might be a redneck if......

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Synthetic oil with the extended oil changes is cheaper than dino. I used Mobil 1 synthetic in my '98, changed every 7,500 miles and it was cheaper than dino in my '85 every 3k.

Scott

__________________
Scott
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)
1965 Pontiac GTO 15,000 restored (sold)

7500? Mate, you should be doing at least 10,000 on synthetic.