Well, is there any correlation between dashboard icons and your gas tank? NO! And why do we put up with this kind of poor design as consumers? Unfortunately, this kind of lackluster and "broken" design is commonplace and is frequently overlooked, and accepted if it's even noticed...
I stumbled across this post on Core77 (a great design blog) the other day, and had to check my car just to be sure. As many of the comments show, this is just wrong.
The iconography on the dash has little or nothing to do with which side of your vehicle the gas tank is on. Unless it's a Ford. My Ford Explorer has an arrow to indicate which side you fill-up on which is really helpful.
At least on many computer systems, web sites, and software applications the iconography is far more consistent, conventional, and helps the consumer use the product and isn't that the point?