April 5, 1983

''Everything is going tickety-boo so far.'' - Paul J. Weitz, astronaut. (C5:1.)

A ruling that Texaco Inc. overcharged customers about $1 billion for crude oil sold in the mid-1970's was left intact today by the Supreme Court. The Court, without comment, refused to hear an appeal from the oil company and the State of Louisiana. But Texaco, based in White Plains, said it ''will continue to contest'' the allegations of overcharging and that the case against it ''is baseless.'' The dispute is over Federal regulations aimed at controlling the price of ''old oil'' while permitting higher prices for ''new oil.'' Beginning in 1973, the Department of Energy classified as old oil monthly production equal to that from the same property in the corresponding month of 1972. Any additional oil was classified as new and could be sold at a higher price determined by market conditions.

Reflecting the severe problems facing many of the nation's small oil and gas producers, the Saxon Oil Company reported yesterday that its fourth-quarter loss had widened to $41 million. It added that its auditors were ''unable to express an opinion'' on its financial condition because of unresolved problems in restructuring its huge debt. The MGF Oil Corporation, a contract oil and gas drilling company in Texas, also reported a deficit for the fourth quarter yesterday. MGF said it lost $58.5 million in the quarter and received a qualified auditors' opinion on its 1982 results.

President Reagan today asked Congress for authorization to restrict imports from countries that sell to Communist bloc nations in violation of an American trade sanction. The proposed legislation, in the form of amendments to the Export Administration Act, would be the first to empower a President to restrict imports during trade disputes. In the past the United States has penalized foreign companies violating American sanctions by putting them on a so-called ''denial list,'' an action that prevented them from purchasing American goods and services or from importing technology from their parent company.

The head of the corporation building New York City's new Convention Center said yesterday that he hoped to have a greatly expanded work force on the site by summer to help make up for long construction delays. But neither the official, George Schoepfer, nor other Convention Center officials could say how much time they would gain. The center, a joint venture of the Triborough Bridge and Tunnel Authority and the State Urban Development Corporation, had been scheduled to open in mid-1984, but construction problems could keep it from opening fully until until 1985 or later, according to recent studies.