I need to find some artists names that sing the good roll down the windows and rock out music. I'm going on a long road trip and would like to download some fun music. Blues or rock or anything that has a good sound. I do not know the names of any older bands. please help

Muddy Waters is a lot of fun.

R.L. Burnside, too.

Lightnin Hopkins, Howlin Wolf - check 'em out.

zz top, stevie ray vaughn, blues traveler, jimi hendrix, george thorogood, zeppelin, some of the white stripes (honestly) i.e. Ball and a Biscuit, tom petty....it goes on and on depending on which era you like, i would recommend Joe cocker anthology as well

That's a though one cause I don't know what you already got.
But for Blues I'd suggest the Blues Brothers :-)
And for ROCK, I can recommend AC/DC works fine with me.
I never ride my car without AC/DC.

Please answer my question:
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If you are looking fro newer stuff try out Luke Mulholland and Clayton Senne..

Older stuff I second Muddy Waters