[This review was collected as part of a promotion.] After replacing the engine oil in both my generator and lawnmower with this brand of oil the engine sounded smooth and run like a charm and this was the first time for me of ever using this brand of oil and in my opinion this engine oil is of the greatest quality of oil on the market.

[This review was collected as part of a promotion.] It's a great full synthetic oil from a brand you can trust. So, the results are perfect, as expected! Great packaging for the shipping, impressive results! This oil will keep my car's engine running nice and smooth for the years to come.

[This review was collected as part of a promotion.] Pennzoil Full Synthetic is all I use on my vehicles. I have a Jeep and of course I change my own oil. I love how easy this is to use and the quality it provides to my vehicle. My Jeep is running smoothly.

[This review was collected as part of a promotion.] This full synthetic oil is made from natural gas and not crude oil. It helps to achieve better fuel economy. It also helps to keep the vehicle's piston clean. Overall a very well made product for your vehicle and highly recommended.

[This review was collected as part of a promotion.] Cleaner pistons, better fuel economy, made from natural gas not crude - what's not to love? The 5 quart bottle is convenient to both use and store in my shed for future use. This is the only synthetic oil I will use for my portable generator in Florida to help keep it ready for emergencies.

[This review was collected as part of a promotion.] This motor oil is perfect for the cooler temperatures. It is smooth and thin, it helps our car run great throughout the colder months of the year. I have used this in my wife's midsize SUV and it helped it run smoothly for many miles. I would recommend this!

[This review was collected as part of a promotion.] I've used Pennzoil Platinum or Pennzoil Ultra in my 3.6L 2015 Jeep Grand Cherokee & my wife's 2017 Ford Edge since day one. Both vehicles are now over 90,000 miles and run great. The biggest difference I've noticed between this and oils I've used in the past (in other vehicles) is with cold weather starting. With Pennzoil synthetics both of our vehicles start without hesitation or that dry/clunky noise on winter mornings.

[This review was collected as part of a promotion.] I love Pennzoil. I like the fact that it is made well without contaminants in the oil like regular base stock mineral oil. Works great and all the applications that I used it in for my jeep wrangler and suabru. I've found that cars I've used other oil on have had engine troubles, while I can prove a correlation I do believe this to be related.

[This review was collected as part of a promotion.] While its hard to notice a difference between various oils, I "feel" like the Pennzoil synthetic makes the car run quieter. The difference is very small but I do feel like I notice a difference when I use it. It does pour out very easy and doesn't spill too bad. I highly recommend Pennzoil Synthetic oil!

[This review was collected as part of a promotion.] I have been using Pennzoil motor for as long as I can remember. It has always done me good and never had issues with my motors in any of the cars I've owned. This full synthetic oil is absolutely the best in my opinion. Excellent in preventing engine wear, resistant to both over heating and freezing and is very high performance. I owned a Firebird and Camaro. A good plus is that its recyclable. I like that it comes in a 5 quart jug and the jug has 2 handles to grab onto. Also, the price is competitive to other synthetic motor oils. The best!