xoeightx

I wish I could say the same. What kind of wheels do you have? I have 20" Work VS-XX wheels, although I do know bigger wheels means they're heavier and can cause lower MPG, but I don't think my wheels are that heavy to be getting the lower MPG i'm getting.

I've gone though LA and back to OC which is only 50-60 mile round trip and go through more then 1/4 a tank. That's just cruising and maybe light traffic.

exhausts usually let the car breathe better and improves MPG as long as your not driving hard all the time, so i'm planning to get a Magnaflow. I've done some research on K&N drop in filters and will probably just replacing it an OEM filter instead, and going to get new spark plugs and hopefully see better MPG results.

TheRacerBoss

In my M5 with 80% highway and 20% city I get around 16.5 mpg.
If I were to do all highway at about 75--80mph I would get 20mpg,
You dont even want to know what mods I have on my car because they were not put on there to get you gas mileage but to give you pleasure.

I am running
1. Catless headers
2. RPI Section 1 and 2
3. Corsa Section 3
4. AFE cold air intake
5. Evolve Stage 3 tune
6. Sprint Booster (medium remap)

Lets take a step back in time when I was on
1.Stock headers
2 RPI(Section 1,2,3)
3. BMC airfilter

With 80% highway and 20% city, I would get 13mpg.

If you are looking at MPG, look away, the M5 is not for you.
The M5 is one car that loves visiting gas stations and take my word my friend, you will hear the Fuel Reserve gong pretty often in an M5.

dakest

Took out the carbon filter! makes a big difference in the throttle response, will be watching the mpgs in the course of the week.
Will let you guys know if I see a difference.

onetime

There was an earlier thread here regarding removal of the carbon filter. Some said it made no difference, others thought it made a difference. I doubt it will make a difference in terms of increasing MPG.

iyaayas12

I have an 06' 530i with RPI air scoop, and 20" miro 111's. I usally get 29-31 mpg on the hwy. When i had my 18" 124's on there i was getting up to 33 mpg. So it does make a diffrence. I thinmk the RPI scoop helped the most in terms of mpg

stuttgartinmass

If you are worried about the gas mileage (also regular maintenance is higher for the e60 m5) you should consider something else, possibly a 535?

onetime

Agreed, forget the M5, if gas mileage is a concern.

xoeightx

Yes, I concluded that the bigger wheels decreased the MPG. I've also heard the RPI scoop does help air flow and that does help increase MPG. I will have to look out for one. I also just ordered a new air filter and spark plugs and will see how much those will help as well.
+1, 535 with a chip/tune would be another great choice. You can get so much more HP with just a simple piggyback

onetime

RPI scoops pretty much do everything. They increase hp and mpg, wow.

Roy7

Yep, it's amazing that such a tiny little scoop was such a brilliant idea - I cant believe BMW never thought of it (I'm being sarcastic).

(I've got one on my car and have noticed no difference at all - it still makes me happy to have it).