Firestone Complete Auto Care

Two mistakes on initial visit that made me not trust them nor ever want to bring my car back to the Newton NJ Firestone: during an oil change, they told me that my battery is failing even though my car is fairly new, less than 2 years old. Luckily the dealership is only 5 minutes down the same road; I go there to see if a battery is under warranty. The dealership checked my battery, gave me a printed report with all passing results and told me I’m the third person this week from Firestone who had a «failed» battery that wasn’t true. Also, the dealership mechanic pointed out that the Firestone oil change sticker stated 3,500 miles before the next oil change but if they used full synthetic oil, which my vehicle requires, then it should state 7,500 miles. Odd, I asked for a full synthetic oil change at the very start of my Firestone appointment and I stressed that since I already knew my car does not take regular oil. Turns out Firestone put a cheaper blended oil that cannot be used in my new car (even though I told them NOT to) and told me my battery is failing (even though the dealership said its in perfect condition)-those are the reasons I will never trust Firestone with my car.
When I went back to Firestone, I calmly explained what the dealership mechanic stated. Firestone did say they will check the battery machine and re-​did the oil change by giving me the full synthetic without paying for the difference of blended vs synthetic. I believe they resolved it as fairly as they could after the fact, but overall, I’m a pissed off customer because I had to spend two hours at Firestone, then 45 minutes at the dealership to find out everything Firestone did wrong and then another 45 minutes at Firestone for them to redo my oil change. Had my dealership not been close by, I may have been jipped without realizing.
Ironically there’s a sign inside Firestone that says Honesty is their fundamental policy. Ok, I will give them the benefit of a doubt they were not intentionally being dishonest. Maybe Firestone’s battery check machine malfunctioned as opposed to them running an ongoing scam telling people to buy batteries they don’t need. Either way, their mistakes still cost them a customer’s trust. As a female, I feel like it’s extra hard to find a trustworthy auto shop that won’t take advantage of car knowledge but I will look elsewhere; I refuse to do business with an auto shop I can’t trust.
By the way, I’m posting this same review on the Firestone website because they asked for me to rate my experience. If it’s not posted on their website, that’s an additional reason I would not trust Firestone.

Stopped in yesterday (6÷4÷14) with a slow leak in my Passenger side rear tire, probably ran over a screw or nail… it was 5:50pm, both tire centers in town (STS and Midas) were not able to help me (either the techs have all clocked out well before closing time, or they already shut down the air compressors etc… around 5:30pm)
Walked into Firestone and was greeted by a very nice service manager who took great care of me, and got my tire repaired in literally no time. Saved me from having to put the spare tire on, thus saving me a bunch of time, and I was able to be on my merry way.