SEC1939

Had oil change in my 2005 CDI, Guy put in Mobil 1 15-40 weight. Wish he had put in 0-30 or 5-30 w. Wondering if anyone has experience on oil weight & MPG? I would expect a lower MPG when the engine is cold with the higher weight. Any comments ?

Diesel Benz

15W should be high but more importantly, I doubt this would fulfil the MB requirements. Did you see the MB rating?

It should probably be 229.5 for your car (229.51 for diesels with particle filter).

http://www.whnet.com/4x4/oil.html

SEC1939

I know they put in mobile 1 but I am not sure if it meets the spec. Any thoughts? I thought about bringing my own oil but he said he has what I needed.

I would do it myself but the deisel oil is like ink, no jack stand positions, ramps I have are a bit low

Untertürkheim

There is no Mobil 1 15-40 weight, there are 0, 5, 10 -40 weights, and 15w-50, at least in the US.

SEC1939

looking closer at the paperwork they wrote 15-50 syntec

Untertürkheim

That oil is not approved for your car. Time to find a shop that has some clue as to what they are doing.

E55 PWR

The only oil that will drastically improve MPG is Royal Purple, everything else is snake oil by comparison. I've gotten on avg 2-3mpg from doing engine & diff with RP on multiple different benzes.

SEC1939

manual shows a 15-50 w

Untertürkheim

A 2005 Mercedes requires 229.5 or 229.51 spec oil, Mobil 1 15w-50 does not meet either of these specifications.

FWhite

I have had very good luck with Elf Excellium 0W-30 in my 06 CDI. It meets MB page 229.5 specs and is approved MB. My milage increased about 2 mpg over Mobil 1 5W-40.

Make sure the oil you use specificly meets 229.5 or you are on your own as far as Mercedes is concerned.

nikon

+1 Hands down the best oil in the industry.

FWhite

I'm sure Royal Purple is very good oil but it is not approved by Mercedes.
http://www.whnet.com/4x4/oil.html

SEC1939

Elf Excellium 0W-30 sounds like the ticket. I will have them change the oil. Very interesting information. much appreciated

SEC1939

how about Castrol Syntec 0-30w looks like it meets their 229.5 according to the web site?

Where do you find the elf products? Mail order ?

Thanks
Steve

FWhite

You should note that Elf has changed its company name and is now Total. The new name for the oil is Total Quartz Energy 9000 0W-30. I have ordered Elf and the last time they shipped Total. It's the same stuff. The container is marked MB229.5.

SEC1939

shop stepped up and changed the oil to the elf product 0-30w as suggested. I think it already made a difference in my MPG's Appreciate all the advice

Steve