Thank you, nice that you find that interesting!
Here is a little list:

Set in the past:
Rallybrudar is set in mid-sixties Sweden: http://www.imcdb.org/movie_1139805-Rallybrudar.html

Kid Svensk is set in 1984 Sweden and Finland and is also alittle about rallying: http://www.imcdb.org/movie_847183-Kid-Svensk.html

Dubbel-8 is set in 1964 and is about two kids that wants to make a nude-movie, a little about vehicle culture back then: http://www.imcdb.org/movie_205027-Dubbel-8.html

Set in the present:
Selma & Johanna a movie where two kids that run away from home and goes on a roadtrip and ride with an american car to a car meeting among other things: http://www.imcdb.org/movie.php?id=118579

Babas bilar is set in northen Sweden and is about illigal stuff that take place there, the maincar of the movie is a Caddy as you can see: http://www.imcdb.org/movie_473609-Babas-bilar.html

Den frusna leoparden is also a movie about illigal stuff where the maincharacters ride aorund in american cars: http://www.imcdb.org/movie_91087-Den-Frusna-leoparden.html

Det nya landet, the main characters goes on a roadtrip in Sweden with a Mazda 323 and at one place they meet a bunch of "Raggare" (people who love american cars): http://www.imcdb.org/movie_188350-Det-nya-landet.html

Rapport till himlen, alot of american cars used in this series: http://www.imcdb.org/movie_108901-Rapport-till-himlen.html

Smala Sussie, a cruising is seen and one of the characters drives an Impala: http://www.imcdb.org/movie_323998-Smala-Sussie.html

Old movies about 'Raggare':
Raggarjänget: http://www.imcdb.org/movie_56391-Raggarganget.html

Swedish Teens Run Wild: http://www.imcdb.org/movie_1004509457-Swedish-Teens-Run-Wild.html

Hope these movies fit the description...