Sonic font here refers to the font used in the logo of Sonic Corp., which is an American drive-in fast-food restaurant chain based in Oklahoma City, Oklahoma.
The font used for its logo is probably Futura Bold Italic, a geometric sans designed by Paul Renner in 1927. You can view more details about it here.
Download Futura Font
The Futura font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.