Horrible mileage after oil change
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Recomendation:
If possible, use Castrol Edge 0W-30, which is 229.5 approved. If that is not around, find an approved ?W-30 synthetic oil. Note that 229.5 includes 60% ?W-40 oils, and 40% ?W-30 oils (break-in oil is 5W-30).
Depending what you had been running before Quicky-Lube, you should see a noticeably better milage. Also a better oil for cold starts, vs ?W-40 oils.
.
For better cold starts a 5W-30 will not really give any benefit over a 0W-40.
Remember at cold temperatures the 0W is lighter in viscosity than the 5W.
A 0W-40 is only thicker at operating temperatures than a 5W-30. The principle of multigrade oils with VHVI base oils and higher VI improver treat in the 0W-40.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
.
Super Member
Joined: Jan 2008
Posts: 702
Likes: 3
From: Illinois
'08 C300 4Matic Sport, '02 530i
Yet if you compare the specs, all the low SAPS oils have a significantly lower starting TBN. If that's not a direct correlation, then I don't know what is.
Last edited by Pete7874; Oct 26, 2012 at 11:30 PM.
Super Member
Joined: Jan 2008
Posts: 702
Likes: 3
From: Illinois
'08 C300 4Matic Sport, '02 530i
I still don't see how that would have a huge impact on MPG. And if the collapse caused some major restriction, most likely the oil pressure would be out of line and he'd get a warning message.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
I just don't think it's a coinsident that they did an oil change, the mpg's went down, and the oil temp jumped 20 deg C. It's like they put 60 wt oil in, but they didn't.
.
.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Super Member
Joined: Jan 2008
Posts: 702
Likes: 3
From: Illinois
'08 C300 4Matic Sport, '02 530i
The temperature gauge he's referring to is coolant, not oil. But yeah, it is strange that it went up. Oil viscosity may affect oil temp, but should not affect coolant temp - that's what the thermostat is for.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
James at this point, I STRONGLY recommend:
1) switch to the approved Castrol 0W-30, especially with winter comming.
2) during oil change, save 1/2 L of old oil, to see what they actually put in
there by oil analysis. This costs about $25 US, by places like blackstone.
With a little luck, the temp will come down, and milage will go up, and we may find the cause of the problem.
.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Sorry Kevin. I see you were talking 0W-30 & not 5W-30 oil amongst your ?W comments. It's a good call for cold condition fuel efficiency. Benz is happy with 0W-40 as a global oil all temp conditions but a 0W-30 will likely give you a little fuel saving over first 20Km's from cold start.
I would still like to understand this large discrepency in fuel consumption. That's not viscosity influence.
I would still like to understand this large discrepency in fuel consumption. That's not viscosity influence.
Last edited by Glyn M Ruck; Oct 27, 2012 at 11:55 AM.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Benz stipulates that no one product shall claim meeting both 229.5 & 229.51. They imposed an ash clamping limit to ensure this.
229.51 <0.8% sulphated ash
229.5 >0.8% ~ 1.6% sulphated ash
While some additives are ashless, sulphated ash still gives a good idea of additive treat level. Not TBN.
In essence low SAPS oils give away some engine protection to give added protection to Cat converters & particulate filters. It's a trade off. On top of this in the US we have ILSAC GF4 to contend with. There are additional Zinc & Phos limits mandated by ILSAC GF4. This further reduces valvetrain protection. Benz likes non low SAPS products with decent zinc levels in their gasoline engines even though they have roller rockers. They are also fanatical about HTHS ~ all to protect the valvetrain.
Read my posts #33 & #36 here:
https://mbworld.org/forums/c-class-w...highlight=ZDDP
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
Ya Glyn, I thought your 1st response missed the point.
One thing I've learned about the SAE J300 viscosity grades, it for any winter oil spec, 0W, 5W, etc, is that the SAE cold cranking ratings (ASTM D5293) just specify a max viscosity at a specified low temp. The actual value can be much lower.
So look at the 0W-30 vs 0W-40, the max rating is 6200 cp @ -35C. But you can have a better rating of 5500 and it's still a 0W-X oil. Point being all 0W oil cold ratings are not the same, so I have 5W-30 oils with better cold prop's than a 5W-40. I don't have data for the Castrol 0W-30 vs M1 0W-40.
.
One thing I've learned about the SAE J300 viscosity grades, it for any winter oil spec, 0W, 5W, etc, is that the SAE cold cranking ratings (ASTM D5293) just specify a max viscosity at a specified low temp. The actual value can be much lower.
So look at the 0W-30 vs 0W-40, the max rating is 6200 cp @ -35C. But you can have a better rating of 5500 and it's still a 0W-X oil. Point being all 0W oil cold ratings are not the same, so I have 5W-30 oils with better cold prop's than a 5W-40. I don't have data for the Castrol 0W-30 vs M1 0W-40.
.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Sorry - I misread your post. Yes you are correct. To do a proper evaluation you need to plot the exact formulations on a viscosity graph vs. the ambient temperature at which you are starting the vehicle. It's the only way to know what the engine is really seeing. Very few vehicles are starting at -35 deg.
Sometimes trying to simplify things on a forum leads to comments being less accurate than intended.
Sometimes trying to simplify things on a forum leads to comments being less accurate than intended.
Last edited by Glyn M Ruck; Oct 27, 2012 at 01:29 PM.
Member
Joined: Nov 2010
Posts: 197
Likes: 1
From: Australia
C220 CDI SLK 200
To do the service yourself costs less than a hundred dollars for filters and oils
The hardest part is disposing of the used engine oil.
MB quoted me $3.5K to fit a towbar which can be done for $500 including lights and reprogramming the computer.
Quoted $2.3K to replace brake disks and pads, can get them sent from Europe and do them myself for a quarter of that price.
Has my car broken into and had the small quarter glass smashed. MB wants 1.7K to replace. Windscreens O"Brien want $395
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Old sump oil is great to keep the white ants out of your fence & posts , also for preserving your verandah boards.
You can also paint your poultrys legs to control scaly leg mites !! & it helps to ignite green heaps of garden prunings!
Don't waste it
You can also paint your poultrys legs to control scaly leg mites !! & it helps to ignite green heaps of garden prunings!
Don't waste it
Last edited by Carsy; Oct 28, 2012 at 02:19 AM.
Member
Joined: Nov 2010
Posts: 197
Likes: 1
From: Australia
C220 CDI SLK 200
MB charge 250 bucks an hour per mechanic. two mechanics for one service is $500 ++ My previous C class was written off after a minor accident because replacing the Air bags alone was worth more than the car.
Just recently according to a TV report, a dealer tried to charge $4,000 to service a Volkswagen Golf.
Me, Ive got the tools, time, service manual, knowledge and access to spares from Europe and it saves me a fortune
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
MB charge 250 bucks an hour per mechanic. two mechanics for one service is $500 ++ My previous C class was written off after a minor accident because replacing the Air bags alone was worth more than the car.
Just recently according to a TV report, a dealer tried to charge $4,000 to service a Volkswagen Golf.
Me, Ive got the tools, time, service manual, knowledge and access to spares from Europe and it saves me a fortune
Just recently according to a TV report, a dealer tried to charge $4,000 to service a Volkswagen Golf.
Me, Ive got the tools, time, service manual, knowledge and access to spares from Europe and it saves me a fortune
