What a tunnel wash actually does

A drive-through wash is built for speed. Brushes and recycled water remove loose dirt, but they also grind the grit from the car ahead of you into your clear coat. Over time that's where swirl marks come from.

The interior, door jambs, wheels barrels, and trim are untouched. It's a rinse, not a detail.

What a professional detail covers

A proper detail is done by hand, panel by panel. Depending on the package, that includes:

• Hand wash with the two-bucket method so dirt never goes back on the paint.
• Wheel, tire, and wheel-well cleaning with dedicated brushes.
• Interior vacuum, wipe-down, and conditioning of plastics and leather.
• Streak-free glass inside and out.
• Hand wax or sealant for real UV and water protection.

When each one makes sense

If your car just needs dust off before the weekend, a tunnel wash is fine. If you care about the paint holding its value, want the interior actually clean, or are preparing to sell, a detail is the right tool — and with mobile service, you don't lose your afternoon sitting in a waiting room.