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I bought my IM yesterday with the 6 speed manual. i commute pretty far everyday, i put about 25k miles on my cars a year so I'm wondering what are the best mods to do for mpg's? I'm thinking the H&R springs to get it lower. have you guys seen any difference in mpg with different intakes, exhaust, ect? i was looking at the intake mod, hps, or AEM. i don't like cold airs because i drive in bad weather a lot. what have you guys experienced, or what do you think?
 

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It's not a modification but keeping your iM's paint in flawless condition helps cut down on wind resistance so you cut through air easier than with a paint that doesn't have a smooth flawless surface. Driving habits play into this big time especially with bad weather conditions.
 

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Not a mod but I've been getting like 3 mpg better by using the cruise control whenever I'm on the freeway.

If you hop on the facebook page, scion iM enthusiast, a lot of people have the intakes installed. When I asked everyone seemed to say it didn't make a very big impact on the mpg although it did increase.
 

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Tape all the seams.

Get light wheels, make sure they're flush.

Low rolling resistance tires.

a teardrop wing at the rear.

Remove any superfluous weight such as the spare wheel.

CAI are recipe for warranty voiding. Toyota techs generally don't even recommend their performance filters because they seem to cause more problems with MAF sensors and **** than it's worth dealing with.
 

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Not a mod but I've been getting like 3 mpg better by using the cruise control whenever I'm on the freeway.

If you hop on the facebook page, scion iM enthusiast, a lot of people have the intakes installed. When I asked everyone seemed to say it didn't make a very big impact on the mpg although it did increase.
Cruise control is NOT more fuel efficient, trust me. However it may be more fuel efficient than what you are able to accomplish right now. Keep practicing! Driving a true hybrid that is sensitive to "fuel efficient tricks" for a year or so has made me get a lot better gas mileage than most drivers in any car now. I never use the cruise control.
 

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No. It depends on the efficiency and experience of the driver and the terrain of where the car is driven. If it's hilly to mountainous cruise control doesn't stand a chance over the ability over an experienced driver and how he/she maintains momentum. Cruise control only cares about one thing, the speed you wish to maintain when you set it. Now if there is a super smart new model of car that utilizes camera images, lasers and/or GPS to drive efficiently, well that's a different argument completely.
 

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No. It depends on the efficiency and experience of the driver and the terrain of where the car is driven. If it's hilly to mountainous cruise control doesn't stand a chance over the ability over an experienced driver and how he/she maintains momentum. Cruise control only cares about one thing, the speed you wish to maintain when you set it. Now if there is a super smart new model of car that utilizes camera images, lasers and/or GPS to drive efficiently, well that's a different argument completely.
Okay, account for this: I've been driving for a little over 9 years. I'm on my fifth car. I've had two domestics, one European car, one Japanese car and one Korean car.

The Korean was the most relaxed of all, it wouldn't downshift on inclines and would let the speed go below what I set it at. I hated the car, but the cruise worked like I drove, so as far as I'm concerned, it was good. The two domestics would downshift unnecessarily and accelerate quickly to compensate for the loss of speed, you can imagine that does a number on the FE of a pushrod V6. The German car was constant as **** but not in a pro-fuel efficiency way. It gave better results than most drivers could achieve, though Average FE in the car for me was 8.1. 8.2 with cruise. 8.3-8.5 for the pleb (my family)).
The iM? I've only used it once, it seemed in line with the German.

It *really* depends on the module's programming, but feel free to dismiss my experience.

Oh, I forget, I had an SX4 for about a month (rental) and that one was twitchy, I was better off not using the cruise.
 

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Let's say you are on the highway and traffic has a pretty consistent flow. Cruise control would be optimal in such a situation, would it not?
 
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