I just bought a 1984 euro 280e.
The car has 88,400 miles on it and the PO used castrol oil.
I have a w124 diesel that I use mobil 1 oil and am really happy with the oil.
I wanted to get recs for mobil 1 in my w123 as I wanted superior flow with the twin cams but did not want the engine to start leaking.....

any thoughts would be appreciated....

thanks for reading

ive used mobil 1 ever since i got my car 2 and a half years ago. but it is a bit pricey cause im down a quart every 3-4 weeks. im not sure about my mileage but i think its around 115k.

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Depends if you want to exceed 7500 miles between your oil changes. If not, I have come to love "diesel oil" 15W/40 in my W124 wagon. My old mechanic who is a diesel specialist had it in bulk. Truth be told, I switched to 5W/30 so I could run the same oil as my Chevy, but in the spring I'm going back. Delo (Chevron) and Rotella (Shell) are highly rated. It's only a matter of whether you can afford the synth stuff if you change regularly.