is there any fuel savers that actually work?

Here is a list of all the fuel saver scams. Chips are a different story, some chips may improve your mileage under certain conditions, though performance chips probably do not, more power always means more fuel burned.

K&N filters sometimes help

That’s about it.. Chips and Tornado’s don’t work at all. Just keep your vehicle in tip top condition and don’t drive it like you stole it.

the K&N filter helps a little. 7% or so in every car i’ve owned.
synthetic oil and trans fluid also 5-8% in every car i’ve tested in… if you get the right synthetic. some will actually lower it, some will raise it short term, but lower it long term. my only good experience has been with castrol syntec. in every car we’ve tried it in, it outperforms everything else over the long term.

chip… iffy, depends on the chip. and doens’t always raise the engine temp, especially if run with a hi flow exhaust which will cool your motor in turn.

exhaust… really only works in conjunction with other things.

lowering. works. usually. reduces airflow and reduces low pressure area behind car… but some lowering kits raise the weight of the car, which negates all other things.

other things that do work… lighter clutch, brakes, rims. but none are cost effective.

if you note, synthetics, high flow filters are not listed on either website… mostly b/c they do help.
i’ve never actually tested a tornado, but while the websites say they ‘don’t work’, every person i new who had one reported 5% improvement…

I switched to a BICYCLE and saved a lot of gas.

I have never heard any of those fuel savers that actually work. If you think about it, if someone came up with something that actually worked why would they do through all the hassle of selling it directly to customers when they could licence it to the car companies and sit back and watch the cash roll in.

The only way to save fuel is to adjust your driving (try and not accelerate or brake hard), make sure the tyres are inflated to the correct pressure, the car is properly serviced and any excess weight is removed. Also ensure that the windows are closed and turn off any unnecessary devices (like satnav, air conditioning, etc).

I’m afraid those are the only things that have been shown to work.

@tomd1980:I could not agree with you more. All those so-called “fuel-saving devices” you see advertised on TV or on the Internet are utterly worthless and you’re wasting your money. While a liquid gasoline treatment, such as STP or Prestone, does help prevent poor engine performance from poor-quality gasoline, they won’t add to your vehicle’s MPG, either.

The fact is, there are only two ways to stretch out your MPG:

1) SLOW DOWN. Don’t drive over 60 miles per hour on the highway — your car’s fuel economy goes down one mile per gallon for every five miles per hour you drive over 60.

2) Got cruise control? USE IT! Set it no higher than 60 mph on the interstate, 50 miles per hour on secondary highways and — wherever you can — 30 miles per hour (the minimum speed most vehicles’ cruise control can function) on local streets. You’ll be amazed at how much fuel — and money — you save by driving at a consistent speed, all the time.

Another benefit of using cruise control: You can better estimate your travel time to your destination, as 60 mph is quite literally one mile per minute (Of course, as a matter of safety, don’t use cruise control under adverse weather and road conditions).