DIY: Supercharger oil refilling
Thread Starter
Senior Member
Joined: Jun 2009
Posts: 253
Likes: 2
Viking War Ship
DIY: Supercharger oil refilling
I had the engine apart for a routine rebuild, so I decided to take the time to replace the oil in the supercharger as well. It was pretty straight forward, and it has been done a few times by some members here. I figured that 50K miles of gear-mashing mayhem was worthy of freshing up the lube.
Again, I had the supercharger off of the engine for part of this so the emptying part was easier I'm sure. I've heard of people using syringes with hoses like I used to literally suck the old oil out. That should work pretty well too.
On with the show:
Here is the oil inlet/drain. Standard Allen plug...no hanky-panky:
With the supercharger off, I was able to just tip and drain the oil out. Again, this was the easiest way possible...but sucking it out would work well too:
Mobil Jet Oil II is the recommended oil for the supercharger. I got it off of an aviation supply web site (www.airplaneoil.com). I ordered two quarts just because I had no idea how much it would take. I used less than one quart.
I bought a syringe from a local farm supply house and some small flexible hose. I think the syringe was intended for cows or enimas or something. It was an appropriate size (35cc). and wasn't overly large or small. The can is weird...like a soup can. I opted to just punch a hole in it versus trying to "open" it.
I packed some shop rags down below the hole and continued to suck and fill until it oozed back out the drain plug I removed. It didn't take much to fill...probably less than half a quart. There was quite a difference in color and smell so I'm glad I opted to pull the old oil out.
Basic stuff and pretty straight forward.
Enjoy!
Again, I had the supercharger off of the engine for part of this so the emptying part was easier I'm sure. I've heard of people using syringes with hoses like I used to literally suck the old oil out. That should work pretty well too.
On with the show:
Here is the oil inlet/drain. Standard Allen plug...no hanky-panky:
With the supercharger off, I was able to just tip and drain the oil out. Again, this was the easiest way possible...but sucking it out would work well too:
Mobil Jet Oil II is the recommended oil for the supercharger. I got it off of an aviation supply web site (www.airplaneoil.com). I ordered two quarts just because I had no idea how much it would take. I used less than one quart.
I bought a syringe from a local farm supply house and some small flexible hose. I think the syringe was intended for cows or enimas or something. It was an appropriate size (35cc). and wasn't overly large or small. The can is weird...like a soup can. I opted to just punch a hole in it versus trying to "open" it.
I packed some shop rags down below the hole and continued to suck and fill until it oozed back out the drain plug I removed. It didn't take much to fill...probably less than half a quart. There was quite a difference in color and smell so I'm glad I opted to pull the old oil out.
Basic stuff and pretty straight forward.
Enjoy!
Thread Starter
Senior Member
Joined: Jun 2009
Posts: 253
Likes: 2
Viking War Ship
As far as I know, there isn't a normal service interval for the S/C oil. I've heard some say it's not meant to be changed. Mercedes indicates what brand/blend of oil to use in their maintenance manual so I'm assuming it is "supposed" to be changed at some point. I'm not sure what to believe...so I changed it. Worst case, it's got fresh oil. 
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
I had the engine apart for a routine rebuild, so I decided to take the time to replace the oil in the supercharger as well. It was pretty straight forward, and it has been done a few times by some members here. I figured that 50K miles of gear-mashing mayhem was worthy of freshing up the lube.
Again, I had the supercharger off of the engine for part of this so the emptying part was easier I'm sure. I've heard of people using syringes with hoses like I used to literally suck the old oil out. That should work pretty well too.
On with the show:
Here is the oil inlet/drain. Standard Allen plug...no hanky-panky:
With the supercharger off, I was able to just tip and drain the oil out. Again, this was the easiest way possible...but sucking it out would work well too:
Mobil Jet Oil II is the recommended oil for the supercharger. I got it off of an aviation supply web site (www.airplaneoil.com). I ordered two quarts just because I had no idea how much it would take. I used less than one quart.
I bought a syringe from a local farm supply house and some small flexible hose. I think the syringe was intended for cows or enimas or something. It was an appropriate size (35cc). and wasn't overly large or small. The can is weird...like a soup can. I opted to just punch a hole in it versus trying to "open" it.
I packed some shop rags down below the hole and continued to suck and fill until it oozed back out the drain plug I removed. It didn't take much to fill...probably less than half a quart. There was quite a difference in color and smell so I'm glad I opted to pull the old oil out.
Basic stuff and pretty straight forward.
Enjoy!
Again, I had the supercharger off of the engine for part of this so the emptying part was easier I'm sure. I've heard of people using syringes with hoses like I used to literally suck the old oil out. That should work pretty well too.
On with the show:
Here is the oil inlet/drain. Standard Allen plug...no hanky-panky:
With the supercharger off, I was able to just tip and drain the oil out. Again, this was the easiest way possible...but sucking it out would work well too:
Mobil Jet Oil II is the recommended oil for the supercharger. I got it off of an aviation supply web site (www.airplaneoil.com). I ordered two quarts just because I had no idea how much it would take. I used less than one quart.
I bought a syringe from a local farm supply house and some small flexible hose. I think the syringe was intended for cows or enimas or something. It was an appropriate size (35cc). and wasn't overly large or small. The can is weird...like a soup can. I opted to just punch a hole in it versus trying to "open" it.
I packed some shop rags down below the hole and continued to suck and fill until it oozed back out the drain plug I removed. It didn't take much to fill...probably less than half a quart. There was quite a difference in color and smell so I'm glad I opted to pull the old oil out.
Basic stuff and pretty straight forward.
Enjoy!
Thread Starter
Senior Member
Joined: Jun 2009
Posts: 253
Likes: 2
Viking War Ship
Trending Topics
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
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
MBWorld Fanatic!
Joined: May 2009
Posts: 1,044
Likes: 2
211-55
Thanks for the detailed write up. I've had alot of experience with Eaton superchargers and a huge mistake would be to overfill the supercharger. Other than refilling just the amount of old oil that came out, would anyone know how much oil is recommended by the manufacturer?
Thread Starter
Senior Member
Joined: Jun 2009
Posts: 253
Likes: 2
Viking War Ship
Former Vendor of MBWorld
iTrader: (1)
Joined: May 2008
Posts: 12,139
Likes: 295
From: Houston
2003 W211 E55, 2003 W220 S600
thanks man. If i cannot find the Jet Aviation Oil II locally, would you want to sell the extra quart you have. That is if you dont have any use for it.
Former Vendor of MBWorld
iTrader: (1)
Joined: May 2008
Posts: 12,139
Likes: 295
From: Houston
2003 W211 E55, 2003 W220 S600
so basically the level of oil in the s/c casing is right at the drain plug? If it is higher than that wont it be hard to refill while on the car?
Thread Starter
Senior Member
Joined: Jun 2009
Posts: 253
Likes: 2
Viking War Ship
The oil level is at the height of the drain plug. It's like a differential...the fill hole indicates the oil level height. But yeah, if it were to need more fluid, it would be impossible to fill with the S/C on the car.
Thread Starter
Senior Member
Joined: Jun 2009
Posts: 253
Likes: 2
Viking War Ship
Perhaps businesses just don't need any money. I get that a lot here too. 
But yeah, just hit me up if you can't find anything. Otherwise, I'll probably just give it out for Halloween.
But yeah, just hit me up if you can't find anything. Otherwise, I'll probably just give it out for Halloween.
Newbie
Joined: Oct 2008
Posts: 8
Likes: 0
W211 E55 AMG
Replacement Screws
Does anyone know where I can get a replacement fill screw? My ball end allen key wasn't as "magnetic" as I first thought.
I'm fishing around for it today with a pickup stick so hopefully I'll find it but please let me know if it's a standard metric one, or has a flanged face etc.
So annoying and nooby I know.
I'm fishing around for it today with a pickup stick so hopefully I'll find it but please let me know if it's a standard metric one, or has a flanged face etc.
So annoying and nooby I know.
MBWorld Fanatic!
Joined: Jun 2009
Posts: 1,388
Likes: 18
'06 E55 K2
Great thread and post kjlindgr (like most of your threads are!). I will definitely embark upon this service soon, as I work with ExxonMobil, I will have to ask the local availability of the Jet Oil.
How is the engine rebuild on E55 and the RB FD?
Yasin
How is the engine rebuild on E55 and the RB FD?
Yasin
Super Member
Joined: Jan 2008
Posts: 626
Likes: 8
From: UK
E55K AMG
Thanks for the very useful write up, how long does it take with the charger on the engine......30mins?
WOW
I love the fact that you can do a routine maintanance engine rebuild
. A full service takes me quite a few hours.
WOW
I love the fact that you can do a routine maintanance engine rebuild
. A full service takes me quite a few hours.
Super Member
Joined: Apr 2010
Posts: 781
Likes: 0
From: Bay Area, CA
E55 AMG, 72' Toyota Carina, 63' Ford F100, 72' Mercedes 250c, 15' Harley Davidson Softail
Excellent write up thanks so much for this. Any difference in engagement or feel for those who have done this already?
