HEY JEFF TRY THIS , SEE WHAT YOUR MAX VAC READING IS AT IDEL, WARM ENG , NOW FOR THE MAX FUEL ECONOMY KEEP THAT READING WITHIN 1 IN AT ANY GIVEN SPD OR GEAR AND WATCH YOUR MILEAGE GO UP,,EVERYONE HERE HAS WITH VERY FEW EXCEPTONS PROVED THAT GEARS ,BIG TIRES , RIDING HI IN THE SADDLE, AND PUSHING A BRICK, MPG IS GOING TO SUFFER, AND A LITTLE ENG WITH 2 OVERDRIVES??? , THAT ASIAN WARNER IN OVERDRIVE IS 30% OVER ALLREADY, PUT ANOTHER ONE BEHIND IT AND THE ENG WILL PROB GO DEAD WHEN IT SHIFTS IN THE THE 5TH GEAR, OR AT LEAST FEEL LIKE ,, ANYONE OUT THERE WILLING TO TAKE ANY BETS WITIN 90 DAYS TO 6 MONTH WE WILL SEE 80% OF THE NEW VEHILES STARTING TO COME FROM WHEREVER WITH UP SHIFT LITES AND OR WHAT WAS CALLED ECONOMY MINDERS AKA AS VACC GAUGES THEY USED TO BE STANDARD EQUIPT ON MID 60,S TIN INDIANS AND RANDIS KIND OF CARS (FORDS), MANY CHRYSLER AND GM CARS AND TRUCKS HAD AN ORANGE LIGHT ON THE FRT FENDER THAT WOULD TURN ORANGE WHEN YOU STEPPED ON A IT LITTLE BIT ..AND ALL WERE PRETTY MUCH VACC ACTIVATED OR RATHER A LOSS OF ... JERRY