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Gas Saving Gizmos & Gadgets

I was told that there were so many devices that can improve your mileage, reduce air pollution and prolong your engine life. I got two names here.

Super FuelMax

and PVI

Are they really useful? Do they really save your money? Who has any experience about these products? Does any of them impact warranty?

Is there any other rccessories or additive outthere?

We can talk about the way to save our money here.



  • Stever@EdmundsStever@Edmunds YooperlandPosts: 38,946
    I don't know much about the two products you list, but the US Federal Trade Commission has some advice about most fuel saving devices, and it's not encouraging.

    Look for "magnet" and "Platinum" on the page. If a magnet could boost MPG by 27%, something tells me GM would bolt one into every truck it sells.

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  • ryanbabryanbab Posts: 7,240
    change oil often (every 3K)
  • scotianscotian Posts: 1,064
    Well, that's not what people want to hear! That's like saying to lose weight, one must eat well and exercise. Sheesh! :-)
  • Jetta Diesel. This device costs around 20k, but will get you 40-55 mpg. And it is extremely durable.

    I would trust an infomercial for a vegtable chopper before I would trust any of those fuel saving gimicks. None of them work in accurate testing.
  • Warning to all motorists!!

    Please don't make the same mistake that I have made on my vehicle. I have purchased every fuel-saving device that I have ever seen advertised. Now, I have to stop periodically and drain off the excess fuel.
  • Stever@EdmundsStever@Edmunds YooperlandPosts: 38,946
    lol, sirfile. I have an extra can around here you can drain the excess into :-)

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  • tronsr1tronsr1 Posts: 149
    I have said it before and i will say it again..
    If it's too good to be true...IT IS TOO GOOD TO BE TRUE!!!
  • If it sounds to good it probably is. Think about it if it saves you that much money wouldn't you expect it to cost more?! What I have found to be the best way to keep your fuel economy up is to do proper maintenance to the car/truck. Check your tire pressure, air cleaner, breather element, regular tune up's, trans fluid changes and oil changes, all at the recommended intervals. All that will not only help your fuel economy but will extend the life or your car for a good long while A clean air filter makes a huge difference in mileage, as well as proper tire inflation.

    I have heard claims of increased mileage with a simple air cleaner change, I am not sure about that, but I bought a K & N air filter for my truck and it made a very slight difference in mileage about .3 GPM. I know my throttle response has improved greatly though, so maybe if I didn't tromp on it hard off the line it would show greater improvement. The main reason for getting the filter was it only cost $39 and my throw away filter cost $10. I clean and re-oil the K&N every 5th oil change, and it saves money in the long run and has a million mile warranty. The re-oil kit is $20.

    Other claims of aftermarket exhaust system and the like are out there and all claim to improve mileage, but it doesn't make sense to spend $500 when it would take 5 years of driving to make the investment back in fuel savings.
  • I am getting a 2002 Camry SE. The XLE has a trip computer (MPG, instant fuel consumption etc...) but the SE does not.

    Is it possible to add an aftermarket trip computer?

    If so, any links?


  • drew_drew_ Posts: 3,382
    I wonder if there is a way that you can retrofit the XLE's trip computer into the SE's dash? It is, afterall, in the same location and I bet that all of the necessary wiring will be in place. However, it may be an expensive job though, but perhaps worth exploring.

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  • eharri3eharri3 Posts: 645
    Drive like you're in city traffic, not like you're in the pole position for the Indy 500. If you're not merging on the highway or trying to get over and there's no good reason to put on a sudden burst of speed, don't do it. Try shifting at lower rpm's than usual... the less hard the engine must work, the more fuel you save. Try to keep it below 70... mileage decreases when you go much faster than that due to aerodynamic drag.
    Of course I practice absolutely none of the above, and could never see myself as sacrificing driving fun for the sake of a few mpg and 200,000 miles of engine life vs. 150. I doubt most others here do, but it's just like the analogy someone made before about diet and exercies. We all love to believe there's a magic pill out there somewhere to cure every ill or improve most aspects of life, simply because if there is one it means we have to be less disciplined and restrained.
  • I just over 1400 miles on my Screw. My mileage was about 11-12 at best. After 1000 miles I installed a K&N air filter, mileage increased to 13-14 right from the get go.It should get better as I go along. These are street only miles and no freeway driving. I have a 2wd 5.4, and no tow packages. and I like to drive fast!
  • eharri3eharri3 Posts: 645
    Since most data Ive seen indicates the k&n might add maybe 1 mpg if that much and often doesnt make a difference at all. Did your driving habit change at all after you installed it? Were you perhaps a bit lighter on the throttle because you wanted to see it make a difference?
  • I have a 2000 MPV that I like very much. After is was broken in it got about 17 mpg around town driving reasonably conservatively. Since then I switched to synthetic oil and synthetic transmission fluid. I also added a K&N air filter, Redline's Water Wetter, and went from 30 to 35 lbs. of air pressure in the tires. You know what my mileage is now? 17 mpg around town! I have moved up from 21.2 trip mpg to 22.4 trip mpg from the first to second year of ownership driving at about 72-73 mph on the interstates. I don't know whether I can attribute these gains to the add-ons or to additional break-in. I now have about 20,000 miles on the MPV, so I guess that's as good as it's gonna get!
  • eharri3eharri3 Posts: 645
    There are so many variable in fuel mileage that it's difficult to tell what really makes a difference and what doesn't according to what people say. And sometimes when people spend 50 bucks or more on a mod they really want to see gains so they feel like it was worth it.

    There's a good possibility that highway mileage improvements might be attributable to the K&N, as they tend to make a very small difference in power and mileage at higher speeds.
  • foxtoxfoxtox Posts: 5
    Getting a free flow muffler and larger pipes can increase your mileage and will add horsepower at high rpms. So will a filter because your engine doesn't have to work as hard to get air.
  • eharri3eharri3 Posts: 645
    Gains are often fairly small, and they depend on what type of engine you're starting out with and how much power there already is to be unleashed.
  • Has anybody seen this new infomercial? Peaked my interest. Does anybody think it's acually worth anything?
  • They cost alot, but many people swear by Jacobs ignitions for power and mileage gains. The most popular place to buy them seems to be
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