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1970 280se 3.5 coupe
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13 Posts
Discussion Starter #1
Hello, I have just finished an 18 year restoration on a 111 3.5 coupe.I have a freshly rebuilt m116 engine. My question is, do i need to put a zinc additive in the engine oil?
 

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110 Posts
It can destroy a cat converter. Not like leaded fuel and more like a slow poisoning. Most diesel oils are in the 1,100 to 1,500 ppm range which should be safe for our old cars.
 

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1989 300CE & 1971 280SE; 73.5 911T
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174 Posts
Liqui Moly 10W-40 is a German oil with the correct amount of lubricating additives for the Vintage Mercedes-Benz engines.
You can get it from Amazon.com for a reasonable price.
On a recent (March, 2020) MercedesSource.com YouTube video you can learn more about it.
 

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w108 & w107
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146 Posts
I use Penrite HPR30 (20/60 in my region) which is a mineral oil and has a zinc additive, in my M116. There are different oils produced by different manufacturers that are similar, so check with your local suppliers, or the person that re built your engine.
I wouldn't go for a synthetic or synthetic blend in that engine.
 

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1996 W124 E220, 1984 300D
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188 Posts
I recommend Liqui Moly MOS2 15W 40 oil. German. Works really well on these motors and has Molybednum Disulphite which is an alternative to ZDDP.

The difference in idle noise and smoothness was immediately apparent and has persisted.
 

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Registered
1970 280se 3.5 coupe
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13 Posts
Discussion Starter #9
Liqui Moly 10W-40 is a German oil with the correct amount of lubricating additives for the Vintage Mercedes-Benz engines.
You can get it from Amazon.com for a reasonable price.
On a recent (March, 2020) MercedesSource.com YouTube video you can learn more about it.
Thank you!
 

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Registered
1970 280se 3.5 coupe
Joined
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13 Posts
Discussion Starter #11
I recommend Liqui Moly MOS2 15W 40 oil. German. Works really well on these motors and has Molybednum Disulphite which is an alternative to ZDDP.

The difference in idle noise and smoothness was immediately apparent and has persisted.
Thank You!
 

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Registered
1970 280se 3.5 coupe
Joined
·
13 Posts
Discussion Starter #12
I use Penrite HPR30 (20/60 in my region) which is a mineral oil and has a zinc additive, in my M116. There are different oils produced by different manufacturers that are similar, so check with your local suppliers, or the person that re built your engine.
I wouldn't go for a synthetic or synthetic blend in that engine.
Thank You!
 

·
Registered
1970 280se 3.5 coupe
Joined
·
13 Posts
Discussion Starter #13
I recommend Liqui Moly MOS2 15W 40 oil. German. Works really well on these motors and has Molybednum Disulphite which is an alternative to ZDDP.

The difference in idle noise and smoothness was immediately apparent and has persisted.
Thank You!
 

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Registered
1970 280se 3.5 coupe
Joined
·
13 Posts
Discussion Starter #14
I recommend Liqui Moly MOS2 15W 40 oil. German. Works really well on these motors and has Molybednum Disulphite which is an alternative to ZDDP.

The difference in idle noise and smoothness was immediately apparent and has persisted.
Thank You!
 

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Registered
1970 280se 3.5 coupe
Joined
·
13 Posts
Discussion Starter #15
I recommend Liqui Moly MOS2 15W 40 oil. German. Works really well on these motors and has Molybednum Disulphite which is an alternative to ZDDP.

The difference in idle noise and smoothness was immediately apparent and has persisted.
Thank you!
 

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Registered
1970 280se 3.5 coupe
Joined
·
13 Posts
Discussion Starter #16
Thank You!
I recommend Liqui Moly MOS2 15W 40 oil. German. Works really well on these motors and has Molybednum Disulphite which is an alternative to ZDDP.

The difference in idle noise and smoothness was immediately apparent and has persisted.
 
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