I heard from several people , that synthetic motor oils are not very good for older like 87ish MB diesels. Obviously people like Amsoil, see no reason for not to use it.
Any experience ? All comments appreciated. Thanks.

That statement you have heard is NOT true. The engine does not know what kind of oil that it has had, nor does it care. You on the other hand do care and would be well advised to use the Amsoil synthetic.

Engines will take what ever you pour down the valve cover and I never saw one throw it back up.

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

I agree with Diesel Giant. I use full synthetic in my 69 220D. It slows down engine wear which is important in an engine 37 years old.

I use Mobil 1 synthetic in my 82 and 83. The decision just comes down to cost.

the two replies are correct.

Run it if if you like. I run the Castrol Diesel stuff (dino), works fine for me.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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So many peoples do not know many things & talking very loud.
So many articles about Oils - or go to Yahoo - Google & look read.
Synthetic Oils are best - if your engine cannot hold mean you run down & need rebuild. Save on Oil pay for repairs.
Up to all who want on own believes what is best.
Amsoil is # 1 & no body can tell - I used on my cars.
190D - 900 000 km original engine.