[This review was collected as part of a promotion.] This is a great oil to treat your engine to if you have never tried it before. It was able to make my engine in a relatively older car run noticeably smoother than before. I was surprised at the noticeable increase in efficiency.

[This review was collected as part of a promotion.] Great product. Works great in my car. No issues. Lasts long time. Only product I use in my cars. Cara always run great with it. Never had any issues with either vehicle using this product. My wide won't use anything else.

[This review was collected as part of a promotion.] I started using pennzoils full synthetic oil on both my trucks about a year ago. Long lasting...I typically go about 7,500 miles between oil changes and the oil still looks good when I drain it. Could probably go another 7,500. Not all oils are of the highest quality as pennzoil

[This review was collected as part of a promotion.] I've always used synthetic oils in all my cars for the extended oil change interval and better protection against viscosity breakdown. The Pennzoil Full Synthetic is just as good as any of the more expensive options like Mobil-1 or Castrol. Oil changes are a great way to keep a car running for a long time and with this oil, I'm not worried about being a few hundred or even a thousand miles late for an oil change.

[This review was collected as part of a promotion.] Have used Pennzoil products over the years. No issues with them and they have worked in all my vehicles. There has not been any instance where they have caused any mechanical issues and vehicles have run well when they are used.

[This review was collected as part of a promotion.] I've always used oil weight of 5w 30 in my jeeps engine. I was never really picky about the brand of oil I used. As long as it did it's job. I was so wrong. I've been having a few miner issues with the performance of my Jeep. When I talked to my mechanic he said it's your oil, try a different brand. So Pennzoil it was and I'm glad I did. My Jeep engine sounds better. It was quick and easy to change my oil myself and I'm loving the Pennzoil brand. Great performance!

[This review was collected as part of a promotion.] This oil is great! After switching to this oil I can tell my engine feels like it runs better and sounds better too also I am getting better MPG now. This will be my go to oil for all my cars. For the price and the benefits, this is a great deal

[This review was collected as part of a promotion.] I was sent a case of six bottles of Penzoil Full Synthetic oil to try. First off I was shocked that I ended up getting a case of this oil. This oil works great for my car. Sometimes I tend to buy cheaper oil and I think that that oil does not work as well. Using Penzoil I know that it is better for my car and lasts longer. Having six separate bottles is more convenient than having to store a big bottle. This oil has just the right amount of thickness, meaning its not watery like some other brands.

[This review was collected as part of a promotion.] My vehicle takes synthetic oil but it's a big cost to get it changed so I invested into doing it myself. Normally I would get my oil change done at places, with a high cost, and a lower level oil but today...today! I will commit to changing it myself. No more stripped out bolts, no more leaks, today I get to batten down all my hatches and create an oil change I know won't go wrong.

[This review was collected as part of a promotion.] I have always used Pennzoil in all of my vehicles. It is the only oil that goes into them. The full synthetic is absolutely the best, I will continue to use this going forward. If you're looking for a full synthetic oil, this is it.