People who dread washing their cars may be focused on the time or expense of taking it to a car wash but keeping your vehicle clean can actually save you money both in the short and long term.
A dirty car increases friction as you drive at highway speeds, requiring more fuel to propel it. Reducing this friction by keeping it clean can actually save you a bit of money at the gas pump, but the real savings comes when you go to sell your car with a meticulously maintained exterior and can set a higher asking price.
If your climate includes harsh winters with salt-covered roads or you live near the ocean, you'll want to wash it weekly to keep the salt from corroding exposed metal. You can touch up small imperfections where paint has chipped away from the surface, so those exposed areas stay free from rust. Garaging your vehicle if possible and keeping it waxed will also go a long way to maintaining its exterior.