Abstract: A platform structure adapted to be positioned on a floor surface to catch and retain mechnical fluid (oil, gasoline, grease, sludge, etc.) that might otherwise drip onto the floor, causing unsightly oil spots or a dangerous slippery floor surface. The platform comprises a rigid panel composed of durable plastic that is resistant to both mechanical fluids and moisture. Additionally, a removable liner, formed of a porous sponge material is located on the panel upper face. The liner is replaceable or reusable, e.g. after it has become substantially mechanical fluid-filled. The linear is retained by a circumscribed vertical perpendicular wall at the edge of the panel. The wall is flanged at the top to form a horizontal rim which overhangs (and is parallel to) the panel. Both panel and liner are supported above the floor surface and underneath the engine or transmission of a motorized vehicle by four downwardly-extending legs, adjustable by a threaded element at the bottom of each leg.