Get Custom Post Type In Wordpress

      <?php

             $args = array( 'post_type' => 'car', 'posts_per_page' => 6,'category_name' => 'pre-owned-cars' );

              $loop = new WP_Query( $args );

                while ( $loop->have_posts() ) : $loop->the_post();

         ?><center>
<div class="col-md-4 infocars">
<div class="homecars">
          <div class="v-img"><?php if ( has_post_thumbnail() ) { ?>

  <a href="<?php the_permalink(); ?>"> <?php the_post_thumbnail(); ?></a>

   <?php } ?>


  </div>
       <div class="vtitle"><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a>
       </div>
     <div class="vprice">Price: <?php $val = get_post_custom_values('Price', '$post', true);

                   echo $val[0]; ?></div>

     </div></div></center>

           <?php  endwhile; ?>
</div>
</div>
   <?php wp_reset_query(); ?>