Is 2150 psi enough to wash a car?

Yes. Car washing is its stated use, and 2150 psi is in the normal range for car paint when you keep the nozzle moving and at a distance. For stubborn tire and wheel grime, a narrow spray angle helps.

Does it need a gas can or oil?

No. It runs on AC mains power, so there is no fuel mixing, oil changes or exhaust. You do need an outdoor outlet and a water supply.

What comes in the box?

The washer, a 17.5 ft hose and a spray nozzle. A detergent tank or extra nozzles are not listed, so check before buying if you want soap application.

How does it compare with a gas pressure washer?

It is lighter, quieter and simpler to start, but 2150 psi is below typical gas units. For cars, patios and light siding it is enough; for heavy stripping, a gas model does more.

Can I use it with an extension cord?

It runs on AC mains, so an extension cord extends your reach, but use a heavy-gauge outdoor-rated cord to avoid voltage drop. The 17.5 ft hose sets how far you can walk from the machine.