Pressure washers are great for outdoor cleaning jobs like washing cars and motorcycles. Two important factors to consider while selecting a washer are water pressure (the higher the bar, the more powerful the washer) and water flow. It's difficult to pick the best power washer for your home and garden needs with so many options available. Electric pressure washers or gasoline are the two power sources. Most pressure washers are electric, making them suitable for light to medium load tasks.