>>3513698>>3513702>>3513704>>3513715>>3513727>>3513731I like these OP. One thing you should always make sure of is that the car is on a flat angle at all times, unless the context of the picture contradicts that rule. One major issue I see with so many "car photographers" on instagram and facebook is that they take photos of cars as if they were taking them with their phone. They're afraid of kneeling or laying on the ground to take a better angled shot.
From what I can see you're already ahead of 80% of car photographers on Instagram in terms of composition, so well done.