Zooming across a lake on water skis, motoring to a fishing spot, cruising the islands on vacation, or navigating a sailboat through a crowded marina, boaters know that engines help make boating fun! Boat engines need fuel and lubricating oil that can harm fish, other aquatic life and even human health when they spill into our waterways. Do an oil drip here and a fuel splash there make a difference? Multiply them by the millions of gallons of oil and fuel that California’s nearly 1...