1994 Cadillac Fleetwood Owner's Manual - Page 262

r r treadmill. These procedures ensure thateach vehicle istested under identical conditions. There aretwo different fuel economy estimates for each vehicle, one Ior city drivingand one for highway driving.To develop these two estimates, separate tests are used to representtypical everyday city rural and driving. The test used to determine the city fuel economyestimate simulates a 7.5 mile (12 km), stop and go trip with an average speed of 20 mph (32 km/h). The trip takes 23 minutes and has 18 stops. About one fifth of the time is spent idling, as in waiting traffic lightsor in rush hour at traffic. Two kinds of engine starts are used: a cold start, which is similarto starting a car in the morning after it has been parked all night and a hot start, which is similar to restarting a vehicle after it has been warmed up, driven and stopped for a short time. The test used to determine the highway fuel economy estimate represents a mixture of "non-city" driving. Segments corresponding to different kinds of rural roads and interstate highways are included. The test simulates a 10 mile (17 km) with an average speed of 48 mph trip (77 km/h). The test is run from a hot start and has little idling time and no stops. To assure that thefuel economy numbers are most usefulfor consumers, the EPA adjusts these laboratory test results to account for the difference between controlled laboratory conditions and actual driving on the road. The laboratory fuel economy resultsare adjusted downward to arrive at the estimates on thefuel economy window sticker the Gas Mileage and Guide. The city estimate is lowered by 10 percent and the highwqY estimate is lowered by 22 percent from the laboratory test results. Experience has proven that these adjustments make the mileage estimates correspond more closely to theactual fuel economy rea lized by the average driver. 249