I like fruity car perfumes and I am going to cut to the chase and recommend and review these.
Areon Car Perfume is Gel based and lasts a bit more than a month (without rolling down the windows)
One tin retails for about Rs. 300-350 but on ebay you can buy the combo and get it for Rs. 235 each.
Do let me know in the comments which car perfume do you use?