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 - ScanGauge IIThe scan gauge II is everything that was promised and works great. The price was reasonable as well. The instructions were well written and easy to follow which is unusual in this day and age. I had no problem using the unit and would recommend it to anyone interested. I am very pleased with my purchase and rate it 5 stars. Rating:  - ScanGauge III purchased the ScanGauge II for my Mazda Miata because I missed certain gage functions from other cars. I programed the intake temperature as a proxy for outside temperature; voltage; instantaneous MPG and I haven't yet programmed average MPG. The programing for average MPG is explained, but the manual leaves a lot to be desired. Everything is explained, but the manual could be better organized. If the manual were better I'd rate the ScanGauge II a 5 star. Installation is very easy as all that is required is to find the OBDII connector and plug it in. There are two calibrations, for engine size and tank capacity and a calibration after your first fillup. Simple once you struggle through that manual. Once everything is in place the ScanGaugeII works as promised. Setting the display background color was very easy and its a good match for the Miata's red illumination. Again, a better organized manual and this would have been five stars. Rating: - Satisfied CustomerI am very pleased with the comprehensive amount of information available. I recently bought a small motor home and was somewhat concerned with the mileage I would get, considering the cost of fuel now. When I first got the camper about 2 1/2 months ago I was getting between 11 and 11.5 MPG. After installing the ScanGauge II, I became more aware of my excess speed and lead foot takeoffs and am now averaging 14 to 15 miles MPG, just by staying within speed limits (55 MPH mostly) and more reasonable takeoffs. I've only had the Gauge for a short time, but so far it has been very reliable and easy to set up. Rating: - Great ProductBefore the scan gauge I was able to get one tank at 35 mpg by changing my driving habits but then it started going back down to high 20's even though I thought I was still driving better. I didn't know why the variation so I bought the scan gauge. Now I can instantly see how my driving affects my mpg and know what works and what doesn't. I just filled up after my first full tank with the SGII and I got 41.8 mpg for the tank. Normally my fuel light will come on around 420 miles, this time I didn't fill up until 520 and the light still had not come on. I actually had 2 gallons left. The SGII will work great to help you achieve better fuel economy but you have to change your driving behavior. It is extremely easy to set up, I am a woman with no automotive skills/knowledge, and I had no problem. I even added a trip gauge to the display using the Xgauge feature so I can see the avg fe for the trip along with the current fe. This will pay for itself quickly at current gas prices. I highly recommend it. Rating: - cool, universal, usefull, informative.I guess you will know before you read this if this is the product for you, cuz, its like it says. I think it is awsome to check my continuous mpg. I can see how much my a/c cost me, if its worth drafting a semi that isnt driving "smoothly" (it is not), hills and start ups are killers no matter what, coasting gets really high. Of course most of it is common sense, but it is great to see and know better descisions to make, like gradually slowing into the hill and coasting down or mildly accellerating for the next. I drive stick and it gets weird when you shift, but really, thats whats happening, your coasting and usually droping rpm. My car is a 2007 Matrix, and it pluged into a 1998 Ford Contour and it was automatic, good gas milage in coast but not as much. It was all plug and play, you can set up gas tank size and fill up points and stuff also change mph to kph and psi to somthin and farenheight to celcius also the colored background changes and dims. It has voltage and water temp, rpm (matches mine aprox.), speedometer (better than mine more like gps estamites). I admitt it can be redundant to have some options, but you can just pick another to watch, and a back up speedometer, tackometer, water temp, voltage, ect is neat. I dont have a problem and cant really test its abilities to help with codes and whatnot, but it seems acurate (choppy sampling) and beleive you could use it to troubleshoot and reset codes. I think it is a delight to have. Actually save me time too. I thought because my car sits at higher rpms at high speeds (above 50) it got way worse milage high up their, but I found if I play hills hitting 65mph and slowly ease back (by not compinsating for the hill) is maybe the best. I think this stuff should come stock on cars. Really, the computer and readings are all thier, this is just a basic iterface. but then again I would like to see back up manual window cranks just in case of rain even if its one handle that sits in the glove box for emergencies or when it becomes a pos. I know the dealers got better, but how many tens of thousands of dollars was it for their diagnostic tool. I really like this, but I thought I would like it anyway so I'm sure you know if you like it too. Or, like some others said just back off the gas (starts, coast, NO accelleration in hills, very constant throttle even a touch could be 10mpg!!!, no a/c sorry my fave too! I wonder if larger cars are less affected by a/c. Opening windows in my car wasnt much difference (only one all way). I want to plug this into more cars. Prius anyone? lol! Hummer? LOL ALOT! Hope this helped you, I thought it was fun even if you just take the tips and you know why I am in the right lane trying not to drive like a moron, but watching my gas. P.S. WATCH THE ROAD. Its really nice to watch others drive with it (although I have watched it while driving). Thanks Amazon woooooo!
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