installing older engine in newer car - Page 4 - PeachParts Mercedes-Benz Forum

240D.Bill · #1 07-09-2022, 03:43 PM

Quote:

Originally Posted by shadetreemechan

I repeated the same 1000 mile trip after 1000 miles with marvel mystery oil and a fresh oil change.
This time I burned one quart during the whole trip which seems much better. I can't say for sure it was the marvel mystery oil. I also discovered a gallon of rotella 10-30 on the shelf mixed with my supply of 15-40 when I did the oil change. I had forgotten that I bought a case of 10-30 last December when I thought I was headed to Niagra Falls for Christmas.

The rest of the case was missing so there is the distinct possibility that the first time I made this trip with the car I had accidentally put 10-30 weight oil in it. That might explain the excessive oil consumption as well.

I did the same thing with my ‘73 240D partly because I was ignorant and partly because there was a case of 10w-30 i the trunk whenI bought it. There was more oil on the engine than in it. I just assumed a quart a day was the cost of owning an old diesel. Fortunately at the time you could always find a case of 10w-30 on sale for $5 and diesel was always cheaper than gasoline.

flainn · #2 07-09-2022, 01:26 PM

One thing to be aware of is that it may be technically illegal in your jurisdiction to install an engine older than the car itself.

shadetreemechan · #3 07-10-2022, 12:46 PM

I failed to mention in my earlier post that I also changed oil brands, going from rotella to mobil one. My 83 240 uses very little oil on the interstate running 15-40 rotella.
I would not have ever used 10-30 in that car intentionally during the summer. I had bought it for a winter run up north. I have found switching to 10-30 in winter helps cold starts and mileage, but we don't get enough winter in TN to make it worth the switch.

Shern · #4 07-10-2022, 03:12 PM

I have the same oil issue running highway speeds for extended periods. On a 600 mile trip I probably burn about a quart. Nothing around town. I have an aftermarket provent catch can installed which catches quite a bit of oil -but again, only on 70mph+ extended trips.
As someone mentioned earlier, I think those are just the breaks for a 616.

Ditto for everything BillGrissom mentioned. I take it Envirosafe is a similar formulation to Duracool (which my system is running)? What a difference it makes over r134...

Good to know about the throwout bearing compatibility.