Would you guys be interested in a Youtube channel with challenges? What kind would you like to watch?

Yes, I would be interested in that.

sorry for bumping but does anyone here know any auto youtube channel? give me please their names if you do... I want to start a channel myself and need inspiration)

my favorites are: Jay Leno's Garage, Motor Trend Channel, and /DRIVE.
Btw I have a truck and also sell truck parts. I have my Instagram blog and it helps me a lot to sell more. I think youtube will affect the sales as well. I also have a Facebook page about trucks. It takes much time to manage all the social media, but I think if I use Onlypult it will be easier to manage them and I will e able to find time for a youtube blog as well.

Instagram has the biggest power in marketing nowadays. And if you want to grow a big and great community around your profile, you need to know how to use hashtags. Hashtags are the key to getting your content seen by people who don't know who you are yet, and they're one of the most important ways that people find new accounts to follow. Also, put a big accent on likes and audience. Use 1394TA to make your profile an influencer-style one. I have around 10-20k story views with them, and that's great.