Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Just not my favorite, noticable performance drop

Pennzoil, one of the best known and recognizable product in automotive and marketing today. It has a great fan following and product following. I honestly have not had the best of luck with the product. Many a time I have tried to use Pennzoil in my automobiles, and in the summer, not bad. But when it comes to the winter, It is noticably different. I have heard the Lifters in all of my cars, especially in winter, click more when starting up. This is just not a problem when I use other oils, mainly valvoline. Also, pennzoil is more of a parafin base to it, and one experience I had was seeing little chucks coming from my oilpan of pasty parafin. So, sorry for those guys that love pennzoil, but I just haven't had the greatest luck here in the midwestern weather.