SL55/63/65/R230 AMG: Adding MPG to a SL55 AMG
Super Member
Joined: Jan 2007
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09 335i 03 CLK55 AMG
Exactly. If you want to increase your MPG put a air filter directly on the throttle body, the warmer air will result in better fuel economy but also decreased performance. Cruise control at 55-65mph, keep tire pressure correct, use only 93 octane so the timing doesn't retard, Reduce any extra weight in the vehicle, limit the use of the climate control, etc. Before anyone says why cruise at 55 and blah blah it defeats the purpose of owning an SL55...I know this. I am answering the OP based on their question.
MBWorld Fanatic!
Joined: Feb 2009
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From: Central WI (BFE)
SL55, ML500 & Acura TL
A tough question for must of us. We drive 500+ horsepower cars so are not terribly concerned about fuel mileage. I'm guessing your best option is to keep your foot out of it which is something I have trouble doing. There is an added benefit to this strategy, you rear tires will last longer.
Super Member
Joined: Jan 2007
Posts: 780
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09 335i 03 CLK55 AMG
A tough question for must of us. We drive 500+ horsepower cars so are not terribly concerned about fuel mileage. I'm guessing your best option is to keep your foot out of it which is something I have trouble doing. There is an added benefit to this strategy, you rear tires will last longer.
Junior Member
Joined: Sep 2009
Posts: 47
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SL55 AMG
if you truly believe any type of intake will increase MPG or HP u are probably 16 and should be driving a honda civic with a fart can.
get over it u drive an sl55 and you shouldnt be concerned with going from 18 mpg and trying to get 19.
embarrassing that this is even a topic of conversation.
get over it u drive an sl55 and you shouldnt be concerned with going from 18 mpg and trying to get 19.
embarrassing that this is even a topic of conversation.
MBWorld Fanatic!
Joined: Dec 2004
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if you truly believe any type of intake will increase MPG or HP u are probably 16 and should be driving a honda civic with a fart can.
get over it u drive an sl55 and you shouldnt be concerned with going from 18 mpg and trying to get 19.
embarrassing that this is even a topic of conversation.
get over it u drive an sl55 and you shouldnt be concerned with going from 18 mpg and trying to get 19.
embarrassing that this is even a topic of conversation.
there are many intakes that will give you more power on stock motor simply by reducing the intake temp (ie cold air intakes) on boosted engines. in addition to that on n/a engines a less restrictive intake (less kinks, bigger air filter) will result in better throttle response and a little improvement of upper rpm hp
are you going to see 10% more power from cai? no, not really. but it is (often) a money-wise improvement that some folks decide to go for. especially if you have mods on the motor.
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Member
Joined: Jun 2011
Posts: 94
Likes: 0
2005 SL55 AMG
Move up hill from your job and get unlimited towing from AAA. Coast to work as much as possible and have them tow you home.
Otherwise you can shorten your right leg by 2 inches and not adjust your car seat.
OK, obviously thisis sarcasm. The easiest way to do this is to go easier on the gas, but what is the point?
Z
Otherwise you can shorten your right leg by 2 inches and not adjust your car seat.
OK, obviously thisis sarcasm. The easiest way to do this is to go easier on the gas, but what is the point?
Z
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,703
Likes: 5
From: Arizona
SL55AMG, Ferrari 348, Ferrari Testarossa, Ferrari F40, Ferrari Mondial t, Ducati 916, Indycar
In practical terms, when we tune these cars, we make them more efficient.
I have swapped back and forth between stock mappings and our performance mappings and if I drive consistently, I see a +-2mpg increase in our tuned set up. Of course all bets are off at the track...... it's 6mpg!
I have swapped back and forth between stock mappings and our performance mappings and if I drive consistently, I see a +-2mpg increase in our tuned set up. Of course all bets are off at the track...... it's 6mpg!
Member
Joined: Aug 2011
Posts: 105
Likes: 0
E250 Cabriolet
Sell it and get an SL350? Seriously dude, if you want good MPG your better of getting a Car without an AMG badge. Wont be as fun, and you wont enjoy it as much. But, if saving a few bucks keeps you happy, id say get a different car?
Super Member
Joined: Dec 2011
Posts: 531
Likes: 88
From: EDH, CA.
2012 E63 AMG
In practical terms, when we tune these cars, we make them more efficient.
I have swapped back and forth between stock mappings and our performance mappings and if I drive consistently, I see a +-2mpg increase in our tuned set up. Of course all bets are off at the track...... it's 6mpg!
I have swapped back and forth between stock mappings and our performance mappings and if I drive consistently, I see a +-2mpg increase in our tuned set up. Of course all bets are off at the track...... it's 6mpg!
Senior Member
Joined: Mar 2017
Posts: 318
Likes: 97
From: Maricopa Arizona/San Diego California
1988 BMW M5, 1989 BMW M3, 1979 Mercedes 450 SEL 6.9, 2006 SL55 AMG w/ P30 Performance Pack
Exactly. If you want to increase your MPG put a air filter directly on the throttle body, the warmer air will result in better fuel economy but also decreased performance. Cruise control at 55-65mph, keep tire pressure correct, use only 93 octane so the timing doesn't retard, Reduce any extra weight in the vehicle, limit the use of the climate control, etc. Before anyone says why cruise at 55 and blah blah it defeats the purpose of owning an SL55...I know this. I am answering the OP based on their question.
I average 10 mpg with Renntech mods. This is my daily driver and drive it semi aggressively when it's safe. I spend about $80 a week on 91 Octane (California) and never concerned with fuel economy. This is not the type of car you drive and worry about mileage, but again to answer the question, all your suggestions may lead to better fuel economy! Our cars already have a "cold" intake. The snorkels gulp air outside of the hot engine bay now. The design of the airbox though right on top of the engine probably just heats incoming air anyway so its a wash. I have seen engines with header wrap on their OEM plastic snorkels to cool incoming air I doubt if they benefit to mileage is measurable there. I have a full Renntech carbon intake (OEM) style on my car and I do notice that carbon parts do dissipate heat better than aluminum or plastic.
Last edited by m5zealot; Oct 21, 2018 at 05:50 PM. Reason: attachment
Member
Joined: Oct 2005
Posts: 196
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From: Byblos,Lebanon
SL 55 , Infinity FX37, Aprilia Caponord Rally
average 16 mpg , normal driving with heavy city traffic , mountain roads , etc... occasional speed bursts and high speed
stints ( 125/130 mph ) . I'd say this is good mileage for a 500+ hp car
very happy with it and mileage is never really the issue when driving a V8K .
Get another car as your DD
stints ( 125/130 mph ) . I'd say this is good mileage for a 500+ hp car
very happy with it and mileage is never really the issue when driving a V8K .
Get another car as your DD
MBWorld Fanatic!
Joined: Aug 2003
Posts: 8,882
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From: In my garage
E55, GLS450, GL63, GLE350
I average over 20 mpg on my SL 600 with all the SpeeDriven mods except turbos. The V12 gets surprisingly good mileage when you are not in city traffic and or mashing the throttle.
MBWorld Fanatic!
Joined: Jul 2010
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SL55, S500
