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The new approvals are designed for newer engines. As you know flat tappet engines require higher ZDDP preferably over 1100ppm.. edit: so in my hunt for good oil (relative to my car) , good zddp and phosphorous, not fully synthetic. Not many options.. Diesel oils, and few others like Motul....

Except, that I keep hearing thicker oil is better for these types of engines. + the recent MB approvals are based on API SM/SN which has low ZDDP .. which I am staying away from. They might be ok for newer Mercedes but not for 30+ years.

List of approved MB 229.1 http://mercedesbenzfluids.blogspot.com/2016/02/2291-multigrade-engine-oils.html I now it is an old list and it does not mean much...

Thanks again, not sure how to interpret this report... 229.1 is an old standard probably goes back to API SF or even before....

Thanks for the info. It is semi synthetic...

Hi: Base stock meaning that the mineral oils (I am guessing around 80% of semi synthetic products) would be of better quality? What do you think of the Calcium 3000 and Molly 100 compared to the others..

quality....

Thanks for the insight. How does the Motul compare to the Shell T4 or T5 (Notice I did not mention T6 because it is Synthetic).

MB 229.1

I like it because it is not fully synthetic. I do not want full synthetic and I do not want to argue why. Looks like good quality oil, and it is recommended by Motul site. SL API (zinc 1100, Phosphorus 1050, Calcium 3080, Moly 100). It is good for a flat tappet like my engine... just little...

Just concern about starting it up in my garage in the winter when it is like close to freezing 32F Many people with same cars do 20W50 in summer as well. 15W40 would flow better at startup, no?

Just got this for my 1991 Mercedes 420 SEL Live in midwest and I drive only in summer with occasional short drives in winter when sunny... This oil is much thicker than the older Diesel Shell Rotella T4 (15w40) that I used. Is this a problem? it has good zinc and phosphorous for my flat...