CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER Q—ENERGY POLICY (Parts 600–611) > PART 610—FUEL ECONOMY RETROFIT DEVICES > SUBPART B—Evaluation Criteria for the Preliminary Analysis (§610.20 to §610.25) > 610.23—Operator interaction effects.

610.23—Operator interaction effects.

The device will also be evaluated with respect to:
(a) The degree of sensitivity of device effectiveness to variances in installation, operation and maintenance;
(b) The adequacy of manufacturer-furnished instructions for minimizing variances in installation, operation and maintenance;
(c) The extent to which device installation or use, or the effects of such installation or use, relate to Federal emission control regulations;
(d) Effects on the performance, safety, or occupant comfort of the retrofitted vehicle, and on that of other vehicles; and
(e) The relationship between total cost of ownership of the device (purchase price plus maintenance costs) and the cost savings realizable from its fuel economy effects.
The device will also be evaluated with respect to:
(a) The degree of sensitivity of device effectiveness to variances in installation, operation and maintenance;
(b) The adequacy of manufacturer-furnished instructions for minimizing variances in installation, operation and maintenance;
(c) The extent to which device installation or use, or the effects of such installation or use, relate to Federal emission control regulations;
(d) Effects on the performance, safety, or occupant comfort of the retrofitted vehicle, and on that of other vehicles; and
(e) The relationship between total cost of ownership of the device (purchase price plus maintenance costs) and the cost savings realizable from its fuel economy effects.