Mavis Discount Tire

Took my car in for a routine oil change at the local STS around the corner.
1) A day later my VSC Check engine light came on. I searched online and found that there may be a loose vacuum hose. Never ever had a problem like that. Coincidence? I can't afford to have it checked. I am afraid to mention anything to them and have them do more damage. So now I am riding around with the check engine light on.
2) I also noticed I had a slow leak in one of my tires that had hardly any wear. I found a roofing nail in my tire. I find it hard to believe that a 4 inch spike can be driven into my tire just by driving over it. Yes, I believe they intentionally did it to have me come back in and buy a new tire.
3) I took my car to a reputable service center not long after and found out that my custom air filter was GONE and had been replaced with a stock Japanese model. Those bastards stole it!
I performed another search online to see if anyone else had similar issues regarding STS and found some interesting information.
I believe the mechanics may make sales commission on auto parts and tire sales after reading what ""The Inside Scoop"" and others wrote at ripoffreport.
Their motto is ""It's a trust thing""!!! What a joke?!?! Do you know ""the trust thing"" that kids do? One falls backwards and trusts the other to catch him. I wouldn't try it at the STS in Ridgewood.
Take my advise, stay far away.