9/27/2013 - JM - SAUTEE, GA
Have 30 years exp in auto repair and was pleasantly surprised with results from this item. Put in my wife's toyota and increased hiway mileage from 29 mpg to 32.5. The second one was used in my motor home for a trip from Sautee Ga. to Wash D.C. and back. Hiway mileage increased from 12 mpg to 15.2. Pleasantly surprised & would reccomend to all. One little thing, I plugged into the toyota after cranking and check engine light came on. I reset it and always plugged in before cranking with no further problems.
9/6/2013 - HK - FOND DU LAC, WI
Being an engine technology student, I realized that this unit has potential for engines that are running at less than peak performance. I purchased one for my '07 Chrysler Town & Country van. I filled up at the gas station, noted the mileage and drove 52 miles down the highway before pulling in to fuel up. The pump clicked off at 0.92 gallons. That's about 55.5 MPG! Before Fuel Doctor, that van was doing about 18 MPG. Results will vary, depending on your engine performance. "If it ain't broke, this can't fix it." But, most users should notice some improvement in mileage and performance. I ordered 3 more for my cars!