1997 E320 oil change to synthetic BAD? - Mercedes-Benz Forum
 
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#1 (permalink) Old 12-23-2011, 05:39 PM
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1997 E320 oil change to synthetic BAD?

My father has a '97 E320 with 110k that has always had dino oil. Today he had a reputable Indy shop change his oil. Long story, but the short of it is he thinks they may have used Syn instead of dino (yes, the work order says dino, but as I said, long story ...). As he understands it, <97s need to use dino only.

2 questions:
1. So, does MB say dino only in 1997 E320s? And, if so, why?
2. What issues/problems from changing to synthetic?

"Search"ing the forum, too ...

TIA-

T
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#2 (permalink) Old 12-23-2011, 05:55 PM
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Come on... just because you grew up on cheese pizza, doesn't mean you can't have a Supreme when you can afford.
I run synthetic even in my lawnmower. That is more of convenience, since I don't want to buy dino oil for one machine only. All my old tractor, forklift, pressure washer do have synthetic in them. Not to mention the 87 Mercedes 300dt.
BTW. Mercedes USA was using dino oils till about 2000, when class action suit made them change the policy.
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#3 (permalink) Old 12-23-2011, 09:44 PM
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I also run all synthetic on everything except my very early mini's and austins as their integral engine oil driven autoboxes dont do well on synthetic although the mechanical boxes do. Ive been running my early 70's 350 and 450 sl's on shell rotella synthetic for years. The original formulations may have caused leaks but the newer formulations (at least since before 2000) are very gentle on older engines.
dont worry too much about it and drive for 10k miles to get a cleaner engine!
cheers
Barri

2001 e320 wagon, 1973 350sl euro, 1974 450sl, 1976 450sl, 1978 450 slc euro
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#4 (permalink) Old 12-24-2011, 05:46 AM
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Thanks for the input. I had a 2000 E320 4M that I drove ~215k miles and sold this summer; ran Mobil 1 in it every 10k. I have also switched to syn in every other car I've owned since '96 (a Honda, Volvo and several Land Rovers).

I know very little about the '97 W210 6-cyl, though, or why it would need dino - my dad was under the impression that MB had said 'nothing but dino'.

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#5 (permalink) Old 12-24-2011, 09:11 AM
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The synthetic oil was finer and thinner in viscosity and can find the place to leak especially the right front corner of the head gasket on the famous M104 engine. The problem's not the oil but rather the head gasket and both my 95 and 97 had M104 which I plan to tackle the problem on them very soon, as long as you keep an eye on the oil level and cleaning under the engine should be fine. I known it's a nuisance to have oil drip all over, I had a piece of carpet underneat the engine in the garage and piece of cardboard if have to park on driveway untill the HG was tackle.

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#6 (permalink) Old 12-24-2011, 09:34 AM
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Originally Posted by KMani1 View Post
The synthetic oil was finer and thinner in viscosity and can find the place to leak especially the right front corner of the head gasket on the famous M104 engine..
Don't know how exactly it work, but on at least couple of cars I bought used, the synthetic actually lowered the oil consumption. I think the better oil makes the piston rings sealing better, therefore less oil gets burned.
I do fix visible oil leaks, so even our diesel at 230,000 miles barely needs oil added.
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#7 (permalink) Old 12-24-2011, 09:41 AM
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I change my oil usually at 5k and never had to add oil in between, it would reach the minimum level by the time it reach 5k I believed it never burn but seepage to the HG.

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#8 (permalink) Old 12-29-2011, 01:19 PM
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I also run all my cars on synthetic, including the 87 190D turbo. I have had no bad effects, and now that I have a W210 I am running Mobil 1 in that too; it has just under 1000 km on the oil change so I am keeping a close eye on it.
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