Replacing Rear gear oil
Thread Starter
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,856
Likes: 7
From: Socal
07E63, 12E350, 08997TT, 16SiennaSE
Replacing Rear gear oil
Hey Guys, I was thinking of getting my rear gear oil change out. Who has done it and what type of oil did you use?
thanks!
Peter
thanks!
Peter
Senior Member
Joined: Sep 2006
Posts: 329
Likes: 1
e55
Royal Purple Max gear is the best diff oil by far. Its 75w-90. It will give you increase in MPG as well as boost power a bit by reducing friction. While you are at it might as well do engine. It definitely made a significant difference in MPG and it was one of the biggest factors in getting me up to bout 23-27 city and 31-34mpg hwy (the other being crank pulley & intake & X-pipe). hope that helps.
Thread Starter
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,856
Likes: 7
From: Socal
07E63, 12E350, 08997TT, 16SiennaSE
Royal Purple Max gear is the best diff oil by far. Its 75w-90. It will give you increase in MPG as well as boost power a bit by reducing friction. While you are at it might as well do engine. It definitely made a significant difference in MPG and it was one of the biggest factors in getting me up to bout 23-27 city and 31-34mpg hwy (the other being crank pulley & intake & X-pipe). hope that helps.
i'm getting 13.7 mpg around town and I'm very easy on the gas padel. Thank for the info on the gear oil. So 75W90 is good for E55.
thanks again!!
MBWorld Fanatic!
Joined: Mar 2003
Posts: 5,546
Likes: 6
From: SFV, SoCal
2022 CLS450 AMG 4Matic
Royal Purple Max gear is the best diff oil by far. Its 75w-90. It will give you increase in MPG as well as boost power a bit by reducing friction. While you are at it might as well do engine. It definitely made a significant difference in MPG and it was one of the biggest factors in getting me up to bout 23-27 city and 31-34mpg hwy (the other being crank pulley & intake & X-pipe). hope that helps.
Senior Member
Joined: Sep 2006
Posts: 329
Likes: 1
e55
