[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.] Ive used Penz for years in my cars. I always appreciate the quality of their product. Especially as they have introduced synthetic. I've gotten out of the habit of changing oil, but my son and I worked on changing his together. A great product!

[This review was collected as part of a promotion.] So glad I came across this! Since using my vehicle seems to even be running better. I’m happy to know there is a product like this that will help keep My vehicle on the road longer! Happy to use and I recommend this type of oil to anyone who can use it!

[This review was collected as part of a promotion.] Put this stuff in your vehicle and you won't have to worry about for about 7,000 miles. Great value, and cheaper than at most part places. this stuff is one of the best performing synthetic oils available, My SUV has the oil life sensing system and having a good quality oil is important and i cant think of any other reason not to buy this oil

[This review was collected as part of a promotion.] I changed my oil with this Pennzoil Full Synthetic oil and will update this review in two and a half months after I complete another oil change. I put my old oil in an airtight container and will compare the Pennzoil to that once I do my next oil change. I have no other way of knowing how well the Pennzoil works other than to compare it to the brand I regularly use. I’ll be back! My wife says I can’t update reviews, so I will complete another review after my next oil change.

[This review was collected as part of a promotion.] This is a great quality and amazing oil for your car. I suggest you shake this bottle very well as the additive falls to the bottom of the container and you want this to go in your car correctly the additive looks like a sandy type material on the bottom of the container. The oil is just right to get the engine running well. This truly works wonders for my car.

[This review was collected as part of a promotion.] Got a case of this oil for my boat. Changed the oil for the beginning of the boating season. Seemed to have a great texture and consistency. I am please with the results and will be using this for my future needs

[This review was collected as part of a promotion.] I recently received the Pennzoil Full Synthetic motor oil and immediately noticed a difference in the way my vehicle ran after use. The oil, which is certified by the American Petroleum Institute, allows my car to run longer between oil changes and increased the fuel efficiency. Over time, choosing full synthetic compared to regular motor oil will save you plenty of money. I have even noticed a difference in the way my car drives, most likely based on the advantages this oil provides to my engine. I would highly recommend this motor oil, especially to anyone looking to protect their vehicle while also saving money in the long run.

[This review was collected as part of a promotion.] Excellent performance and protection. One of the best in the market, have observed that slight increase in mileage and the car runs smoother. Also last quite longer before oil changes that the other brands. Can't go wrong with this one

[This review was collected as part of a promotion.] I used the Pennzoil Full Synthetic 5W-30 in my Chevrolet 6.0 after verifying it is Dexos approved. My mechanic commented that it is excellent oil. It functions well, holds good oil pressure and the engine ran cool and quiet.