The car felt like it was working harder and hotter due to the low engine life. I drive my car every day for 50 miles so every little thing is noticable to me.
This might be an unpopular opinion but I've tried the Amazon brand oil and it made my Si feel much smoother and stronger compared to when I used Mobil 1.
I am very impressed about the OEM like fitment and quality of this cell phone holder. I had the iOttie 2 and 3 before this and they require you to glue a pad to your dash and the mount was really bulky sitting on the dash.. Didn't want to do that on my Si so I wanted a mount that was less...