Oil Question

[RBBailey]

I need to do an oil change on the Defender 300Tdi today. Usually I use the T4 Rotella stuff. However, as of yesterday with the totaling of my wife's MB CDI GL320, I now have some extra oil sitting around that I won't use, unless I use it in the 300Tdi.

Do you think this is an OK switch?
Mobil 1 0w-30 ESP
Mobil 1 0w-40 European Car Formula, with MB approval 229.5 for their diesels

(I was switching to the ESP because the MB dealer had said their in-house oil was the same stuff. Which is why I have both types.)

 

[Napalm00]

0w seems scary to me for such an old design. be prepared for getting a ton of different answers !

 

[RBBailey]

Seems like it might leak?
Any issue you see with these formulas, though? I'm merely trying to use what I have without spending another load of cash and still having gallons of this stuff here.

 

[Napalm00]

no seems like the 0w wont have the film strength or low temp viscosity to protect the engine? im not an engineer tho .

Bobistheoilguy forums is the mecca for this type of question

 

[Red90]

No problem with 0W. That is just the viscosity at very low temperatures. 0W means it passes the SAE cranking test at -35C. 5W means is passes at -30C.

The second number is set by the viscosity at 100C. You want the 40. 30 will be too thin when hot.

I normally run 0W40 Mobil Delvac 1.

 

[RBBailey]

Yeah. It isn’t the weight I’m so worried about, I just don’t want to use an oil that does t handle the diesel grime so well. I’ll use it and change it out in 1000 miles or so. But at least it isn’t wasted sitting in my garage unused.

 

[Roverman2010]

I need to do an oil change on the Defender 300Tdi today. Usually I use the T4 Rotella stuff. However, as of yesterday with the totaling of my wife's MB CDI GL320, I now have some extra oil sitting around that I won't use, unless I use it in the 300Tdi.

Do you think this is an OK switch?
Mobil 1 0w-30 ESP
Mobil 1 0w-40 European Car Formula, with MB approval 229.5 for their diesels

(I was switching to the ESP because the MB dealer had said their in-house oil was the same stuff. Which is why I have both types.)

Save for next winter it will be fine.