The Philippines' automobile industry started during the American Colonial Period from 1898 to 1946, with the introduction of American-made cars, which have been sold in the Philippines ever since. When then-President Ferdinand Marcos declared Martial Law some vehicle manufacturers withdrew from the Philippines, some of which returned in the 1990s after the People Power Revolution ousted Marcos in 1986. During the 1973 oil crisis, Marcos advised Filipinos to buy smaller, more efficient vehicles with 4-cylinder engines. During the early 1990s, a number of car makes entered or re-entered the Philippines, but during the 1997 Asian financial crisis some makers withdrew and sales declined. Since the end of the crisis, automobile sales have increased since with new models.