60nomad

I just had my oil changed with 10-30 mobile one, I think it calls for 0-40 but didn't think it mattered...anyway. I checked oil level through the dash and it says level is ok. First off, it has never done this before today was first time.

Temp outside was 80 and humid if that helps too. So, I started it fresh and cold this morning and everything was fine. Drove maybe 6 miles shut it off, started fine. Then drove 3 miles and shut it off and when I started it again it blew a big puff of blue smoke. Drove maybe 40 miles on and off and all fine. Went to a BBQ and stayed for 4 hours and fine. Drove maybe 20 miles and went to friends house and was there for an hour, came out and started it and a huge puff of blue smoke. Each time after the puff the car is fine, no smoke, no noises, nothing different!

Does anyone have an idea of what this could be? Could it be the 10-30 oil? Could it be a little overfilled? Could it need a motor!?lol

sircl55amg

i think its just little overfilled

AMG E Power

The only oils approved for the m113k is 0w-40 and 5w40 Mobil one.. Why would u put anything else's ? Drain it out put the correct oil in and go from there is what I would do, good luck

Hulk

Probably over filled

There's other oils that are also approved for the 55k motor

AMG E Power

U are correct According to this anyway they gave it to me at the dealer.

60nomad

I really didn't figure it made much of a difference and I did it only bc I have like 20qts of it. I certainly wasn't being cheap, just using what I have handy. If the majority here says to change then I will change it tomorrow, no biggie. It certainly will not hurt anything in 50 miles of driving...that I can tell you! Probably wont hurt anything with 50k miles of 10-30 but I did say probably...I am no oil expert.

If it were a little overfilled, which was my first guess, then does anyone have the reason that the puff of smoke comes out if that is indeed the issue?

Toadster

mine does that if it sits for a few days, but day to day I never see it

MAN55LE

Same.... I had it happen only twice, both after sitting ....not sure ?

AgSilver

Possibly some oil getting by the valve stem seals.

BBBSS

I was gonna say valve seals/guides but being you just changed to a heavier oil and never noticed it before I'd start with another oil change with the right stuff. Could it have been going on a while and you just never noticed? I doubt its seals/guides but anything is possible on a used car with unknown history.

How many quarts did you add?

MindBend

Is it overfilled? Easy first check. Doubtful very much it's the oil weight.

The viscosity rating at cold temps on the 0-weight, is better and actually less at higher temps. So, any negative effect would be when it was hot, not cold since you are not NEARLY at temps cold enough to matter.

60nomad

Thanks for all the responses. I think I might just change it to the correct oil. BBBSS: You might have a point that I just never noticed it with the other oil in there.

I added 8.5 qts. The prior oil change was done with 1 quart of lucas added to 7.5 quarts of the correct 0-40 weight for a total of 8.5-9 quarts. I didn't due the prior one my friend did it. Again, after the initial puff it runs fine no smoke nothing so I am sure that it isn't anything I need to worry about but want to be sure. Thanks again to all!

MindBend

Why adding/added Lucas?

moosejaw

If it was overfilled, the warning light in the dash would have come on.

60nomad

Someone told him it was good to add, that's what he told me.

cij911

The blue puff of smoke on start up is an indication that your valve seals are going bad (most likely) and by using the wrong viscosity of oil, there is too much oil in the head (possibly ??)....It will be interesting to see what happens when you put in the correct oil (0w-40).

Also, most OEMs recommend to not use oil additives....

60nomad

No one on here ever had this happen? My buddy had a 2006 s55 and it had 40k miles on it and he said that his would do it once in a while too in certain situations.

If valve seals were going bad then it would smoke on acceleration and it does not do that at all.

ArmoE55

Mobil 1 0w-40 only for me.

serge718

Check PCV valve.

60nomad

Yes, I was told to check that but haven't had time. Will check that next time I use it, probably next week. Thanks Serge! Happy 4th to all as I will be away starting tomorrow till the weekend.

marcmaddox

If it started right after oil was changed...it has to be overfilled.

cij911

It is the oil, but it is the viscosity....if it were overfilled it would be burning all the time, not just at startup....

marcmaddox

I have never seen viscosity cause that. I have seen an overfilled condition cause it...I think it's due to the oil level in the crankcase being to high after shutdown causing a windage condition on startup that basically whips the oil to a froth on its pulled from the cylinder walls on start up. Tough call. It's all speculation and I think the biggest question is did it have any of this symptom prior to the oil change. If it truly just started after the oil change, I would drain it (and measure the amount removed) and refill with a slightly lesser amount of the recommended viscosity. That's the only way to eleviate the variables.

60nomad

I personally think that it is the oil...8.5 quarts were put in actually so I doubt it is overfilled and I checked it out on the dash and it says OK. 10-30 is thinner I believe and it is getting through somewhere now as it drips maybe and then it is fine.

I have never had it happen before the oil was changed.

Yacht Master

Did you drain both engine sumps?

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