Do i need new wheel nuts when changing from a steel wheel to alloy wheels?

yes you should . more about wheels visit here

It depends on the wheel bolts you could have at the moment, and the wheels you are putting on. The blt seat has nothing to do with the metallic of the wheels, there are either cup, or 60 measure taper to be had for each steel and ally, despite the fact that ally do *tend* to be taper. The size is likely to be the same as it can be the thickness of the mounting field that is foremost, unless of course you want spacers to make up for a massive change in offset. When you purchased the wheels from a legitimate dealership then they should be able to recommend you on the correct bolts on your car, else let us know what automobile and wheels you might have and we possibly in a position to inform you more!

Yes - on a Ford if you are fitting genuine Ford wheels you must have the proper Ford nuts, the steel wheel nuts are too small.

Yes because generally steel wheels have the eggcorn style nuts. Alloy's usully have shaft style lug nuts with washers. Check out my car forum in my profile POOR GUYS GARAGE. lots of good info on there. Good luck!

sometimes.depends on mag

yes you will.