For 1990 the team retained JJ Lehto and opted to go with Gregor Foitek, son of part-owner Karl Foitek, in the second car. Foitek was contracted to Brabham for two races so Johansson was kept for the opening two rounds. As little money had been put into developing a car for the 1990 season, Onyx arrived at the opening two rounds with last year's ORE-1. Neither driver qualified for the first two races, with Johansson destroying two chassis in the process. At the San Marino Grand Prix the team arrived with slightly updated ORE-1B chassis. Foitek replaced Johansson, who sued Onyx for breach of contract and, along with Alan Jenkins, attempted to get a court injunction to block Monteverdi's planned relocation of the team. Both cars made the grid at Imola, with Lehto coming home 12th. At Monaco Foitek was running in 6th position at a late stage in the race when he collided with Éric Bernard's Larrousse, resulting in him being classified 7th, a result that would be Onyx's best finish of the season. Both cars made the grid in Canada and Mexico, but could only manage one finish between them, with Foitek's 15th place in Mexico. In July Monteverdi had fulfilled his desire to move the team to Switzerland but that improved nothing. A clear indication of how far behind the team had fallen came in France where both cars failed to make the grid, where at the same track last season they had both qualified high up and netted a points finish. At the British Grand Prix neither car made the grid. By the time of the German Grand Prix, Monteverdi had succeeded in changing the team's name to "Monteverdi Onyx Formula One", but once again it meant nothing as although both cars scraped onto the grid, Foitek retired early and Lehto finished six laps behind and was unclassified.