# Gas Saving Mods on the Civic! **URL:** \ **Category:** Builds\ **Created:** [March 18, 2008, 6:13am UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198 "2008-03-18T06:13:04Z")\ **Posts on this page:** 11\ **Page:** 3
**Author:** ![ultradriver10000](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ultradriver10000/32/7397_2.png) [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)\ **Post date:** [March 19, 2008, 2:21pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/41 "2008-03-19T14:21:51Z")
Care to explain how adding a tubro to a motor helps gain fuel efficiency? Last time I checked more air requires more fuel. That means worse gas milage. The reason TDI’s have a tubro is because it is a smaller displacement diesel motor. A small turbo would only work to gain MPG if he some how went with say a 1L motor. Maybe even a turbo 600 out of a bike with a 6 speed tranny. ---
**Author:** ![02svtfocus](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/02svtfocus/32/7318_2.png) [@02svtfocus](https://forums.speedlife.net/u/02svtfocus)\ **Post date:** [March 19, 2008, 2:34pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/42 "2008-03-19T14:34:38Z")
> [@JayS](#): > > There are huge gains to be had by following a semi over a long distance. Mythbusters did an episode about that I was surprised at how far back you could be and still get considerably better MPG. I can vouche for this since I did it myself. I drafted a semi truck within 20ft for a few hours driving down the 75 down to Tampa and saved me a ton of gas. At one point I put the car in neutral when I was about 7ft to 5ft from the truck and could actually feel the air foil pull the car! ---
**Author:** ![Bigairskier1580](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bigairskier1580/32/7612_2.png) [@Bigairskier1580](https://forums.speedlife.net/u/Bigairskier1580)\ **Post date:** [March 19, 2008, 3:41pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/43 "2008-03-19T15:41:58Z")
I just made the drive to and from Vermont, and if I can find a semi going the speed I want, I will gladly hitch right behind them. It’s extremely noticable, and makes a major difference. ---
**Author:** ![snowracer101](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@snowracer101](https://forums.speedlife.net/u/snowracer101)\ **Post date:** [March 19, 2008, 6:09pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/44 "2008-03-19T18:09:08Z")
how hot does the car run with the radiator plugged off? My cousin had a jetta tdi. when he had 15’s on it ( he also had it modded too) he was getting 55mpg. he put a front lip on it and gained 2 mpg. ---
**Author:** ![SilverGT](https://avatars.discourse-cdn.com/v4/letter/s/8dc957/32.png) [@SilverGT](https://forums.speedlife.net/u/SilverGT)\ **Post date:** [March 19, 2008, 10:31pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/45 "2008-03-19T22:31:06Z")
just got about 43mpg on my last tank intown driving 50% city and 50% highway. check the gassaver log i post it up on there. anyone tried this? lol [http://water4gas.com/2books.htm?hop=amdproduct](http://water4gas.com/2books.htm?hop=amdproduct) ---
**Author:** ![mechanicalmadness](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mechanicalmadness/32/5022_2.png) [@mechanicalmadness](https://forums.speedlife.net/u/mechanicalmadness)\ **Post date:** [March 20, 2008, 2:17am UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/46 "2008-03-20T02:17:06Z")
anyone tried this? lol [http://water4gas.com/2books.htm?hop=amdproduct[/quote]](http://water4gas.com/2books.htm?hop=amdproduct%5B/quote%5D) Haha you found it. My wife’s step dad just started playing around with something like that. ---
**Author:** ![justa4door](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/justa4door/32/7259_2.png) [@justa4door](https://forums.speedlife.net/u/justa4door)\ **Post date:** [March 20, 2008, 4:53am UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/47 "2008-03-20T04:53:41Z")
does it work this water 4 gas?? ---
**Author:** ![ultradriver10000](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ultradriver10000/32/7397_2.png) [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)\ **Post date:** [March 20, 2008, 5:37am UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/48 "2008-03-20T05:37:45Z")
That is Electrolysis of water. So your pretty much using a car’s 12 volt system to create some hydrogen. I don’t see how this doesn’t hurt your car. Your injectors are still firing using the same amounts of fuel. I would almost see this as being like nitrous. If it does somehow work, I’d imagine you would need a hell of a tune. ---
**Author:** ![justa4door](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/justa4door/32/7259_2.png) [@justa4door](https://forums.speedlife.net/u/justa4door)\ **Post date:** [March 20, 2008, 5:42am UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/49 "2008-03-20T05:42:51Z")
well i also thought the same but would the o2 sencer act at a small tune and change the maps ---
**Author:** ![reliant\_turbo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reliant_turbo/32/7189_2.png) [@reliant\_turbo](https://forums.speedlife.net/u/reliant_turbo)\ **Post date:** [March 20, 2008, 8:38pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/50 "2008-03-20T20:38:36Z")
not bad mileage. last summer i got 39mpg in my k car on the way to pa and that included racing an SRT-4 near angola. walked him hard too. on the way home i got 36. the hydrogen thing helps… tells the o2 that things are more rich so the ecu backs off fuel. now the problem is that a mason jar with some stainless steel springs in it doesnt produce enough hydrogen to make a difference imo though i havent tried it. now a 5 gal bucket loaded with plated of stainless and hooked to the cars battery with a heater hose to the intake might do a little more. another thing to try make an adjustable gain op amp circuit and install it between the o2 signal and the ecu. add .1-.25v to the signal coming out of the o2 sensor lying to the ecu so it pulls fuel. might mess up the cat but who cares. its a 93 so obd2 doesnt apply. that kind of mod definitely works. i have a few buddies that have widebands sending a simulated narrowband signal to the stock ecu that is a little richer than what is actually happening to the engine. 37 mpg on a heavy dodge daytona turbo with mixed driving was the result. Brian ---
**Author:** ![longuyen88](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/longuyen88/32/7611_2.png) [@longuyen88](https://forums.speedlife.net/u/longuyen88)\ **Post date:** [March 24, 2008, 4:28pm UTC](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198/51 "2008-03-24T16:28:49Z")
> [@02svtfocus](#): > > I can vouche for this since I did it myself. > > I drafted a semi truck within 20ft for a few hours driving down the 75 down to Tampa and saved me a ton of gas. > > At one point I put the car in neutral when I was about 7ft to 5ft from the truck and could actually feel the air foil pull the car! Wow how can you feel safe so close behind a semi? You can’t see in front of them, and you’re too close behind in case they slow down. As for safe trailing distance, there is the “3 second rule.” Say you are 3 seconds behind a semi going 55mph, and d= vt = (24.6 m/s) (3 s) = 73.8 m = 242 feet. I don’t know how much gas you save behind a semi at a reasonably “safe” cruising distance. [Previous page](https://forums.speedlife.net/t/gas-saving-mods-on-the-civic/45198.md?page=2)