Hey bro - FYI for future requests you take care of - you should never save pixel cars as .jpg. Always .png or another lossless format. That way, you won't get the artifacting and the pixel car will be much sharper. Lookin good though man
Example..
PNG:
JPG/GIF:
FYI - I've been doing pixel cars since pixel cars started about 7 years ago :P
Haven't done many lately though. Here are a couple older ones I did so you know I'm not just talking out of my arse..

Base by recaro/blitz/michaelsappak

Everything by me, including the base

All me

A little WIP I never finished..