loop through all meta keys with get_post_meta

I am building a custom solution where I am needing to obtain all the meta values for a post into an array. I have many “keys”. Is there a way to loop through them all without doing this? I have the post ID at this point in my script.

$image_meta =  get_post_meta( $post->ID, 'image', true );

// car year

$car_year = get_post_meta( $post->ID, 'car_year', true );

// car mileage

$car_mileage = get_post_meta( $post->ID, 'car_mileage', true );

// car price

$car_price = get_post_meta( $post->ID, 'car_price', true );

// car model

$car_model = get_post_meta( $post->ID, 'car_model', true );

As @Sally CJ noted in the comment to your question, you should just omit the meta key:

$meta = get_post_meta( $post->ID, '', true );

echo $meta['car_year']; // 2005

In PHP 7.1 you can use array destructing:

[
    'image_meta'  => $image_meta,
    'car_year'    => $car_year,
    'car_mileage' => $car_mileage,
    'car_price'   => $car_price,
    'car_model'   => $car_model,
] = get_post_meta( $post->ID, '', true );

echo $car_year; // 2005