What oil?
What oil?
I'm having a hard time choosing between these two for the 300D.
http://www.mobil.com/USA-English/Lubes/P..._5W-40.asp
http://www.mobil.com/USA-English/Lubes/P...15W-50.asp
Both are real full synthetic, both are Diesel rated. The 300 has no form of heater and, unless the 240 dies, it will be a warm weather car.
15w-50 has higher phosphorus and zinc levels for extra anti-wear, thicker lubricating surface, higher hot oil pressure and 5qts for $22 (vs 4qts).
5W-40 is specifically for Diesels, meets many more diesel oil API specs and handles soot better. The big downer is that its made with low phosphorus to not foul the EPA's precious DPF.
Right now I'm strongly leaning towards the 15W50 for the extra anti-wear additives unless somebody can come up with a really compelling reason to go for the 5w-40....
ForcedInduction
08-09-2009, 07:20 AM
#1
Yes yes yes, I know, OIL THREAD!!!!!11!!!1!
I'm having a hard time choosing between these two for the 300D.
http://www.mobil.com/USA-English/Lubes/P..._5W-40.asp
http://www.mobil.com/USA-English/Lubes/P...15W-50.asp
Both are real full synthetic, both are Diesel rated. The 300 has no form of heater and, unless the 240 dies, it will be a warm weather car.
15w-50 has higher phosphorus and zinc levels for extra anti-wear, thicker lubricating surface, higher hot oil pressure and 5qts for $22 (vs 4qts).
5W-40 is specifically for Diesels, meets many more diesel oil API specs and handles soot better. The big downer is that its made with low phosphorus to not foul the EPA's precious DPF.
Right now I'm strongly leaning towards the 15W50 for the extra anti-wear additives unless somebody can come up with a really compelling reason to go for the 5w-40....
1974 240D 617 turbo swap, W201 5-speed, in the works project
1983 240D 616 stock, DD
1989 Chevy Astro, 617 turbo swap, T5 5-speed, 4.56 diff, work van
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
08-09-2009, 04:05 PM #3The phosphorous and zinc are good for the high pressure lubricant for the cam shaft/followers if you don't have roller lifters! witch Benz diesels don't back then I would run the 15/40 until you have a problem with cold weather then change it!
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
ForcedInduction
08-09-2009, 07:40 PM
#4
The 300 won't see cold weather. When it starts to get cold outside I'll switch to the 240 with its toasty heater and manual climate controls.
1974 240D 617 turbo swap, W201 5-speed, in the works project
1983 240D 616 stock, DD
1989 Chevy Astro, 617 turbo swap, T5 5-speed, 4.56 diff, work van
well heck, that makes this decision easy! go for the 15W-50. It will be interesting to see how it affects the car.
1974 240D 617 turbo swap, W201 5-speed, in the works project
1983 240D 616 stock, DD
1989 Chevy Astro, 617 turbo swap, T5 5-speed, 4.56 diff, work van
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