Porsche returned to F1 again in as an engine supplier, however, this time with disastrous results: The Footwork Arrows cars powered with the overweight Porsche 3512 double-V6 which weighed 400 pounds (180 kg), (according to various reports, including from McLaren designer Alan Jenkins, the engine was in fact 2 combined TAG V6 engines used by McLaren from 1983 to 1987 minus the turbochargers) failed to score a single point, and failed even to qualify for over half the races that year. After the Porsche engines were sacked by Footwork in favor of Cosworth DFRs, Porsche has not participated in Formula One since. According to reports from Arrows, the 3512's major problem, other than a lack of horsepower, was severe oil starvation problems which often led to engine failure.