[Vwdiesel] Quantum Milage pre & post re-ring

[William J Toensing]

Since 1996, all new cars sold in the USA have to be OBD 2 compliant which means that any car must have a standardized plug that you can plug in an OBD 2 reader to find any problems stored on the car's computer. Mark, I don't know if this applies to cars sold in the UK. The reason I mention this is that I bought an MPG meter that plugs into the OBD 2 port on my 2001 Focus from JC Whitney. The brand of the meter is Kiwi & it is made in Calif., not China. It has several functions, of which one reads average MPG & another reads instant MPG. It is interesting to watch MPG readings while decelerating. If I put the car in neutral & use the brakes to stop I get readings of 150 MPG. If I slow down while in top gear or 5 th gear, MPG will run from 90 to 120 MPG. If I shift into 3rd using the engine to slow down, which I often do, MPG is around 45 MPG. Observation: For maximum MPG, when braking, put the gear box into neutral & use the brakes to slow down. Shifting the gear box into a lower gear to avoid using the brakes results in a lower MPG, but does save on brake pads. I can see how a Prius gets 50 MPG (USA) because it can recapture energy used in braking. 
Bill Toensing