Horrible mileage after oil change
The original shop still hasn't responded to me as well. I feel like taking them to court, I'm pretty pissed that they're dodging me.
.I left him an angry message at his voice machine. I have a feeling he's just gonna play stupid.
edit: I called him again, and he actually picked up. I went on a rage tear. He told me that the oil companies keep saying that it is ok, he is taking more of an apologetic tone now. He says if I can get the oil companies to admit that they're at fault, he'll give me my money back + some money for my time.
Sigh.... It's so sad that a group of Mercedes Benz enthusiasts on a web forum is 10x more knowledgeable than so called professionals. Thanks guys for the continued help.
Last edited by JamesKim; Nov 10, 2012 at 08:00 PM.

I love this forum and I love you all, that's all.
Peace out!
Last edited by JamesKim; Nov 13, 2012 at 04:30 PM.
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There is one big failing in technical people today. The inability to say "I don't know the answer to that. I will find out & come back to you"!
Nobody in this world can possibly know everything. The best they can do is learn something new every day. This requires an enquiring mind.
Last edited by Glyn M Ruck; Nov 14, 2012 at 09:03 AM.
The guy called today, profusely apologizing for the entire mess. I told him I understand that the oil company gave him wrong info. He has told me he will refund my cheque, but no mention of cheque for my time (he mentioned this earlier). He instead told me he will give me free oil changes 3-4 times. I mentioned that he told me about the cheque, and then he told me I can ask for what I think is reasonable for my time. Unfortunately, I couldn't bring myself to say the amount. I told him any amount would do. Let's see how much he thinks my time is worth hahahaha.
Last edited by JamesKim; Nov 14, 2012 at 01:40 PM.
the quick-lube shop put in 5W40 229.51 oil for MB diesels, and water temp went up and milage went down, correct?
1) what were the oils before and after the 5W40 noted?
2) what used oil did you save a bit of ?
The oil analysis shops in the US are like this one:
http://www.blackstone-labs.com/free-test-kits.php
You pay extra for a TBN test.
.
the quick-lube shop put in 5W40 229.51 oil for MB diesels, and water temp went up and milage went down, correct?
1) what were the oils before and after the 5W40 noted?
2) what used oil did you save a bit of ?
The oil analysis shops in the US are like this one:
http://www.blackstone-labs.com/free-test-kits.php
You pay extra for a TBN test.
.
Last edited by JamesKim; Nov 14, 2012 at 04:33 PM.
1) what were the oils before and after the 5W40 noted?
That is, what oil was in before the put the diesel oil in, and the oil after the diesel oil was removed.
Also any updates on water temp?
.
The shop owner still hasn't sent me my cheque yet, what a douche.
my bad. Edit: I thought the coolant temp went from 80-100, but apparently 90 is the correct operating temperature so I must've been mistaken. I could swear it used to sit right at 80, maybe I never drove it long enough to reach 90 since I haven't had the car very long. I didn't actually get the car until July and didn't really drive it anywhere except to work and back. The coolant temperature went higher than normal and I had a steep consumption swing after the oil change so I decided to look into the oil. But I've been told over and over that the oil shouldn't have that kind of effect, so any guess is as good as mine.
Last edited by JamesKim; Nov 19, 2012 at 01:29 AM.
my bad. Edit: I thought the coolant temp went from 80-100, but apparently 90 is the correct operating temperature so I must've been mistaken. I could swear it used to sit right at 80, maybe I never drove it long enough to reach 90 since I haven't had the car very long. I didn't actually get the car until July and didn't really drive it anywhere except to work and back. The coolant temperature went higher than normal and I had a steep consumption swing after the oil change so I decided to look into the oil. But I've been told over and over that the oil shouldn't have that kind of effect, so any guess is as good as mine.
The oil code for that engine is 229.51. I found out that the oil required for my car is 229.5. But then after some research, apparently 229.51 used to be on the approved list for Petro cars until the U.S. started adding ethanol to their cars, and the only reason why 229.51 isn't accepted is because of the ethanol causing some kind of blockage?
The premium gas in the gas station I go to says there is 0 ethanol in it's premium gas.
Should I get the oil changed?
https://products.liqui-moly.com/oils...h-5w-40-1.html
I've had my M276 e klasse for 8 years and this is the only product I use. Aside from this product I also use this one at every service:
https://products.liqui-moly.com/additives/cera-tec.html
Finally, I add this to my fuel tank every 6 months:
https://products.liqui-moly.com/addi...n-cleaner.html
FCP Euro is a well respected service centre in the US and together with my MB specialist, I got this idea from them:
Hope this helps. Good luck!








