TO THE EDITOR:
Mike Colburn's statement in his letter to the editor that "one of the primary problems caused by ever-increasing emissions regulations is loss of fuel economy" is baffling ("California emissions deal a waste of time," Aug. 5). This claim and the alleged problems he cites couldn't be more wrong.
Although denied by the EPA, emissions regulations did result in reduced fuel economy in the early 1970s because of the control methodologies employed. But the incorporation of catalysts, fuel injection, more sophisticated engine designs and, yes, direct injection have resulted in remarkable improvement in vehicle fuel economy.
STEVE WELSTAND, Pinole, Calif. The writer is a retired consulting engineer for Chevron Products Co.