Ive got a honda civic and 105.00 work very well. Ive used this frequency in my car and at work and it works well on both. Most radio frequencies used work to a 0.1 tolerance (which so i am to believe the USA dont have the odd numbers because they are deemed useless due to this) so any frequency 0.2 awat from one that is used should be fine. A quick search on google for unused radio frequencies should throw up some results