Lower MPG
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
The OP may just see the MPG reduce more now when it has been quite hot around the country. It could be the compressor runs much stronger and longer now compared to "normal" summer temperatures.
In my area A/C runs compressor 100% for 8-9 months of the year so it is easy for me to see how much it helps MPG when I turn A/C OFF.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
You can click on the banner in my signature, to see my records. When we don't have a month when we would not use AC at all - November and December are the months when we use it less.
Yet my mpg for those months is lower than in summer.
Biggest difference with mpg comes between driving around Las Vegas, what I consider mostly city, although we drive lot of freeway, when every few months we drive to San Francisco and then mpg goes up about 20%, regardless the fact that 80+ mph we use is not economical speed.
Yet my mpg for those months is lower than in summer.
Biggest difference with mpg comes between driving around Las Vegas, what I consider mostly city, although we drive lot of freeway, when every few months we drive to San Francisco and then mpg goes up about 20%, regardless the fact that 80+ mph we use is not economical speed.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
You can click on the banner in my signature, to see my records. When we don't have a month when we would not use AC at all - November and December are the months when we use it less.
Yet my mpg for those months is lower than in summer.
Biggest difference with mpg comes between driving around Las Vegas, what I consider mostly city, although we drive lot of freeway, when every few months we drive to San Francisco and then mpg goes up about 20%, regardless the fact that 80+ mph we use is not economical speed.
Yet my mpg for those months is lower than in summer.
Biggest difference with mpg comes between driving around Las Vegas, what I consider mostly city, although we drive lot of freeway, when every few months we drive to San Francisco and then mpg goes up about 20%, regardless the fact that 80+ mph we use is not economical speed.
Just turn the A/C off while cruising at highway speed and look at the MPG value how it goes higher. You should be able to drive about 5 minutes and still get cold from the vents.
