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Are there any mods for better mpg?

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    Besides the obvious driving better/checking tires/dropping weight etc. Is there anything you can do to better your mpg in terms of either changing something or purchasing a mod similar to what you would to for better hp but in terms of mpg if that makes any sense.
    Just curious cause i got into a lot of trouble with my car which made me loss all my motivation to put any money into preformance parts (besides practical or cosmetic things)
    but if i could tune it for for mpg id be interested. any feed back appreciated and if theres not really anything its whatever i just do a lot of traveling and its nice to save where ever i can
    There is no mod that i know of that is cost effective. CAI for example will save gas but the cost doesnt justify it.

    For some reason our cars are just really bad with gas... My auto gets 27MPH on the highway and i dont rev pas 3k
    Mods that improve engine efficiency will give better mileage. Of course it still requires you to drive that way.

    Better exhaust to free back pressure slightly
    Better intake to ease flow
    Better tires but not wider tires with proper inflation

    My car is still stock and I average 29mpg on a tank but I do more driving at 65ish than at 40. Also I run my tires at 3psi above what the door sticker says. I have done this for years with no tire problems and it rides just fine.
    • Edited 1 times, last by Web on .
    Driver mod

    With the mods I had on my tC, I consistantly averaged about 31 mpg. Summer was about 33-34 and winter was about 29-32.
    The only mod's I can justify being helpful are as follows:

    * Cold-Air Intake (Injen, AEM, Weapon-R, K&N)
    * Down-Pipe/S-Pipe (Invidia)
    * Header (DC Sport, Weapon-R, Strup, Alphawerks, Dezod)
    * Cat-Back/Axle-Back Exhaust
    * Fully Synthetic Oil (5w20-5w30)
    * Proper Air Inflation in Tires/Nitrogen Filled)
    * Premium Fuel (89-91-93) or Non Ethanol Fuel
    * Fuel Injection Cleaners at fill-up (every 3000 miles) (Lucas, Chevron w/ Techron, Marvels, Gumout)
    * Shift no higher than 3k RPM's
    * NGK Iridium Plugs
    * Proper Vehicle Maintenance


    I use to get 30-33MPG highway, then w/ the introduction of ethanol, that dropped to 27-30MPG highway. The tC gets decent fuel mileage, there are better fuel efficient vehicles out there for sure.
    Alright thats pretty much was what I thought just wanted to see if I was missing somthing thanks guys
    • Edited 1 times, last by CadenceScion on .
    Last tip, REDUCE DRAG! You're Welcome!
    CadenceScion wrote:
    The only mod's I can justify being helpful are as follows:

    * Cold-Air Intake (Injen, AEM, Weapon-R, K&N)
    * Down-Pipe/S-Pipe (Invidia)
    * Header (DC Sport, Weapon-R, Strup, Alphawerks, Dezod)
    * Cat-Back/Axle-Back Exhaust
    * Fully Synthetic Oil (5w20-5w30)
    * Proper Air Inflation in Tires/Nitrogen Filled)
    * Premium Fuel (89-91-93) or Non Ethanol Fuel
    * Fuel Injection Cleaners at fill-up (every 3000 miles) (Lucas, Chevron w/ Techron, Marvels, Gumout)
    * Shift no higher than 3k RPM's
    * NGK Iridium Plugs
    * Proper Vehicle Maintenance


    I use to get 30-33MPG highway, then w/ the introduction of ethanol, that dropped to 27-30MPG highway. The tC gets decent fuel mileage, there are better fuel efficient vehicles out there for sure.


    I fully disagree with pretty much all of this.

    There is no bolt on modification or spark plug replacement that will gain you better fuel economy no matter how much someone swears by it. The best techniques ARE the obvious.

    1. Your Driving Habits.
    2. Change Your Oil.
    3. Keep Tires Inflated Aligned/Balanced.


    Anyone telling you otherwise has been smoking crack.
    Orin wrote:
    CadenceScion wrote:
    The only mod's I can justify being helpful are as follows:

    * Cold-Air Intake (Injen, AEM, Weapon-R, K&N)
    * Down-Pipe/S-Pipe (Invidia)
    * Header (DC Sport, Weapon-R, Strup, Alphawerks, Dezod)
    * Cat-Back/Axle-Back Exhaust
    * Fully Synthetic Oil (5w20-5w30)
    * Proper Air Inflation in Tires/Nitrogen Filled)
    * Premium Fuel (89-91-93) or Non Ethanol Fuel
    * Fuel Injection Cleaners at fill-up (every 3000 miles) (Lucas, Chevron w/ Techron, Marvels, Gumout)
    * Shift no higher than 3k RPM's
    * NGK Iridium Plugs
    * Proper Vehicle Maintenance


    I use to get 30-33MPG highway, then w/ the introduction of ethanol, that dropped to 27-30MPG highway. The tC gets decent fuel mileage, there are better fuel efficient vehicles out there for sure.


    I fully disagree with pretty much all of this.

    There is no bolt on modification or spark plug replacement that will gain you better fuel economy no matter how much someone swears by it. The best techniques ARE the obvious.

    1. Your Driving Habits.
    2. Change Your Oil.
    3. Keep Tires Inflated Aligned/Balanced.


    Anyone telling you otherwise has been smoking crack.


    Orin. I respect your opinions and most of yiu points are valid. While I don't agree with all the things Cadence said, to throw a blankey statement that NO bolt ont will or can help is in simple terms...wrong.

    The reason one engine or car gets better mileage than another is efficiency. Fact.
    To improve efficiency to any platform you have, be it a tC or V8 sports car you will improve mpg.
    That being said, anyone that thinks a bolt on or even a handfull of boltons will get you 5mpg gain is far fetched.
    To get an average of 1 or 2mpg is as much as 15-20 miles on a tank and that in time will pay for the mods.
    ImmortaltC wrote:
    ...


    I agree I've made a blanket statement, however there isn't any proof that something like a combination of air/intakes, ect ect can even improve fuel economy by even 1-2 mpg, I've tried and I've recalculated over and over.

    The only factors that that really affected fuel economy the most on a continual basis were tire pressure, weather, alignment and engine efficiency, i.e. keeping the oil changed.
    holly sh... i just realized i need to change my air filter lol.. my car sucks gas !!
    Ya deff gotta keep ur air filter clean! And use a lighter full synthetic oil! If ur gonna use a treatment may I suggest Seafoam!?!! I use it on all my engines, cars/boat/atv (use as directed for best results!) and I have an I ken CAI! It pays off in the long run! Just keep that filter clean! They tend to get dirty quick! And reduce drag! If u have a spoiler mKe sure it isn't dragging!
    So will the cold air intake really do something on a 08 TC? I've read that usually CAI do improve gas mileage but since the sound of your engine gets more "aggressive" people floor it more often and hence no better fuel economy at all.
    Money for the intake is not the issue for me, is more about the location, I've seen videos where the preferred location is the driver's side fender and splash might happen on rainy days. Any ways to avoid it?
    dargor5 wrote:
    So will the cold air intake really do something on a 08 TC? I've read that usually CAI do improve gas mileage but since the sound of your engine gets more "aggressive" people floor it more often and hence no better fuel economy at all.
    Money for the intake is not the issue for me, is more about the location, I've seen videos where the preferred location is the driver's side fender and splash might happen on rainy days. Any ways to avoid it?


    I did some digging on this awhile back. Found out that in the top lid of the stock air cleaner box (the lid you remove to replace the engine air filter) there is a fixed carbon filter. This filter is for emissions, supposedly it's to "filter out gasoline/hydrocarbon fumes" that are trapped in the intake manifold and prevent them from escaping outside. Well think about it, after 9-10 years on something that isn't replaceable (unless you replace the entire lid, not cheap), it's going to get clogged up!

    I took a look at mine and all it needed was a screwdriver to pop it out and then a dremel to smooth over the posts that remained. When I tried to force compressed air through it, it was less than you blowing gently on your hand! Restriction? yup.

    My mpg's went up about 2.5mpg after I got rid of that thing. Sure, if you're in california they'll get you for removing it. If you don't, try that mod. I think that's what the CAI are working well, since it does away with that hydrocarbon filter.
    sciontc_mich wrote:
    dargor5 wrote:
    So will the cold air intake really do something on a 08 TC? I've read that usually CAI do improve gas mileage but since the sound of your engine gets more "aggressive" people floor it more often and hence no better fuel economy at all.
    Money for the intake is not the issue for me, is more about the location, I've seen videos where the preferred location is the driver's side fender and splash might happen on rainy days. Any ways to avoid it?


    I did some digging on this awhile back. Found out that in the top lid of the stock air cleaner box (the lid you remove to replace the engine air filter) there is a fixed carbon filter. This filter is for emissions, supposedly it's to "filter out gasoline/hydrocarbon fumes" that are trapped in the intake manifold and prevent them from escaping outside. Well think about it, after 9-10 years on something that isn't replaceable (unless you replace the entire lid, not cheap), it's going to get clogged up!

    I took a look at mine and all it needed was a screwdriver to pop it out and then a dremel to smooth over the posts that remained. When I tried to force compressed air through it, it was less than you blowing gently on your hand! Restriction? yup.

    My mpg's went up about 2.5mpg after I got rid of that thing. Sure, if you're in california they'll get you for removing it. If you don't, try that mod. I think that's what the CAI are working well, since it does away with that hydrocarbon filter.

    Sounds great I'll check on it. Is the removal of the carbon stuff permanent? I don't live in CA but I might want to put it back just for the inspection to avoid any hassle
    dargor5 wrote:
    Sounds great I'll check on it. Is the removal of the carbon stuff permanent? I don't live in CA but I might want to put it back just for the inspection to avoid any hassle


    Yes it's permanent, they bonded the carbon filter into the top of the lid by way of these plastic/melted rivets. Not hard to break them out of there. If you need to have it for inspection you might carefully remove it so that you can reinstall it for inspection, maybe a little sticky tape just make sure that doesn't get sucked into the intake! lol
    Alright so I know this is old.I have a 2006 Scion TC, Auto.

    MPG sucks big time, pretty much my fault I drive it way too hard. I AVG about 280 miles per tank 14 Gallons

    280 divided by 14 is 20 MPG roughly.

    I did the Headers and S-Pipe on my TC and also heat wrapped the whole deal. gained maybe 6hp lol. The true nature of my upgrade was in the hopes to get better MPG.

    I averaged 340 Miles with one tank first time around.
    340 divide by 14 is 24.285 MPG

    Scion TC 1's have a 14.5 gallon tank. but by the time you have .5 left the lights been on so I figured 14 would be ok.

    So to everyone saying "bolt on's don't increase MPG" umm yea lol
    also my driving habits never changed this entire time, still flooring the slug everywhere I went.

    I average about 29-30 with all my mods and used to get 32 when I had the CAI, its all about air flow and weight to power ratio, ive saved some weight on mods as well.
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