mastertrust

Searched the archives and found a few comments about oil consumption. Car has 13K miles and I'm beginning to see oil smoke, sometimes a little, sometimes a cloud on startup. I've added a couple of qts in the last 3K miles, and the car is going to the dealer later this week. Any body have any official feedback from MB about the oil use of these cars? My 04E55 never burned a drop, but that driving experience did not begin to compare with this rocketship.

Cheers,

pas

Nothing to comment on the oil burning but curious as to your comment about the difference in the two cars. The 65 is that much better than the 55? I ask because I would like to get a S65 at some point myself and used to have an 05 E55.

whoover

All 65s burn some oil. The oil spray cooling of the cylinders accounts for some, by design. I burn about a quart per 2,000 miles. AMG (at the Private Lounge) says this is normal. Also, my service advisor told me that they burn from 1 quart per 1,500 to 2,500. He told me that when I told him I was thinking of trading in my S55, so he had no reason not to be honest. In fact, he did it because it was a customer satisfaction problem for some of his other 65 customers. I just keep a quart in the velcro tie down in the trunk.

whoover

I don't know about "better," but it's certainly different. The torque at any RPM provides a very different driving experience. Feather it at any speed and it responds. The V12 smoothness also has to be experienced to be appreciated. The car pulls from idle to redline with no vibration. It's uncanny.

mastertrust

The E55 was quick, but just got too small for me. Needed to occasionally haul 4 people and our bags in comfort and the back seat just did not work. I drove the S55 and was about to go that route when a very wicked sales person suggested I take the S65 out for a spin. After that, game over. The car feels big (it is!) but the power is overwhelming. It pulls strong and even, no lag, the power comes on steady and very smooth. Coming back from a weekend trip last Sunday I pulled out a couple of times to pass on country 2 lane roads and just rocketed by vehicles in front. Car has a nice sound and rumble at idle, not intrusive but enough in an indoor parking lot to let you know something different is going on.

The other plus is the inside of the S65 is great. Real leather on the panels, dash, and console. The S has lots of room, first car I’ve ever had where I don’t set the driver’s seat all the way back to drive. Lots of leg room in back, lots of space in the trunk. On the weekend trip we put about 650 miles on the car, averaged 71 MPH on a mix of country, town and interstate roads and the trip computer reported 20.5 MPG.

Do I need the Twin Turbo V12? No, but I’m sure glad I have it.

mastertrust

Thanks for the info. Its at the dealer now, I'll report back on Friday once I have some feedback from my local service rep.

Bigdot

turbos have a tendancy to burn oil, ask anyone with a 996TT lol. my friend had to carry oil with him all the time. i wouldnt worry about it, might try a diffrent oil weight or company.

Mark

ajgk

I had an 2006 S65 that would belch smoke upon start-up. Along with everyone else, this is normal.

It set off my smoke alarm in my garage once.

Fantasm

just make sure your turbos arnt going bad. they might not know until they pull them out and see if theres any play in the bearing

mastertrust

No obvious sign of problems. They did get a little smoke on start up a couple of times. We are now engaged in a full blown oil consumption test. Car was filled with oil, then fully drained. Oil was weighted (?) and then put back in the car. Now I drive it until (if) the "put oil in at the next stop" light comes and then the car goes back to the dealer, where the oil is drained and weighed and examined.

We will see.

RoydRage

A Puff of smoke on startup, or after the car has idled for a few minutes would indicate Valve Seals/Guides.

Best,

RoydRage

AmorSrdanovic

its normal for a turbocharged car to burn oil, when you shut off the car the turbo is still spinning and with no oil circulation due to the car being off that little bit of oil gets burnt up while the turbine is winning down. when you park let it run for a bit to slow the turbo down and keep oil circulation, this will reduce the little bit thats burnt. mine was burning up oil like crazy on 0W-40, (recommended oil) i switched to 5W-30 and the oil burning stopped. thicker oil is better especially for turbo cars

Welwynnick

Mastertrust, what grade of oil are you using? AMG dont' recommend any 30W grade oils for their cars - just 40W. They say the engines need the better high temp shear strength. Don't think the low temp viscosity is so important. Maybe try a 5W-40?

I can't see that a 13k mile car will have worn turbos. Mine did more than ten times that with no problems, and the exhaust had virtually zero unburnt hydrocarbons when last tested.

In general, turbos don't normally leak oil like engines do. They do have seals, but not in the usual sense. They stop pressurized exhaust gas from going inwards into the turbo bearing housing, they don't stop oil going outwards. Oil is controlled with a centrifugal spinning disc in front of the shaft seal, and it all drains away under gravity.

The V12TT also has water cooled turbos with a run-on electric pump, so the turbos are still cooled after shut-down. They have two journal bearings, not one, and they have two hot shaft seals, not one. The same basic turbo is also used on lots of mega-mile commercial vehicles; its a very robust and durable installation. Just don't go cheap with oil changes.

I'll be interested to hear what your dealer finds.

Nick

shardul

iTrader: (1)

where is the electric water pump for the turbos located on the W220?

richvegas

Welwynnick

Its right above the alternator.

shardul

iTrader: (1)

can you please circle it in the pics.

Welwynnick

Its not in those pics. I'll find another one.

Nick

LTe

i believe that is the secondary air injection pump....aka smog pump

Welwynnick

You're right there, that's the EGR pump.
The turbo cooling pump will be pretty small - the feed pipes are only 8mm ID. In fact, I'm not so sure any more that there is a separate pump.
The M275 training document says the cooling feed is at the bottom and the return at the top.
The bottom pipe simply connects to the block, which is pressurized by the main engine pump.
I did read somewhere that there was an electric pump, and I just assumed that was right. So I'd have to say I don't know, and I apologize for the bad information.

Nick