They tend to have pretty aggressive torque converters. And especially if your car has a CVT transmission. Especially in a diesel, which has to battle a ton of compression when it restarts. And it’s unpleasant - especially on restart. DRIVING (& LIVING) WITH ITīut what this means for you, the car owner is: you have to wear it. So, congratulations - you just gamed the system, and there’s nothing illegal about it. You’ll make incremental gains over a competitor without that system in his car. So if you’re a carmaker, and you’re in this intense competition with all other carmakers, and you include the engine shutdown feature in the car, almost half of the official city cycle test is spent with the engine shut down. In the city cycle test - it’s almost half the total time stopped. Together, both tests take 20 minutes - and around one-third of that time is spent stopped. Those valleys over there? The car is stopped. The most non-representative aspect of the tests is the amount of time the cars spend stopped in both the city and in the highway tests as well. They’re just not - the official test numbers are always better than you can achieve out there, on the road, and that leads to a lot of customer dissatisfaction. Unfortunately the tests are not very representative of actual driving. They’re lab tests from which the official fuel figures are derived - and these numbers are very important to carmakers, because fuel consumption is increasingly important to regulators and buyers. The real reason these automated systems exist in many new cars is so that the carmaker can legally ‘game’ the official fuel consumption tests.
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