Toyota Motor Sales U.S.A. Inc. has reached a tentative agreement to settle a nationwide class action by Toyota and Lexus owners who complained their car engines were damaged by oil sludge. A federal ...

The oil inside your car's engine can sludge up with neglect and infrequent oil changes. Sludge is a nasty contaminant that can destroy an engine if not given attention, but timely oil changes are a ...