[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.] I’ve always used penzoil and bought my daughter a car a few months back and figured I’d try the synthetic this time. It’s a fantastic product and will protect my daughters car for miles to come and put my mind at ease.

[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.] I have a late model GMC Yukon XL. Runs great but burns oil more than it used to. I like keeping this around to top off every now and then. Full Synthetic is my choice for extra protection for the high mileage engine.

[This review was collected as part of a promotion.] I have always used Pennzoil in all of my vehicles. This is another great great product that they make! It makes my motor run smooth while offering great protection for it. If you haven't tried Pennzoil, you definitely don't know what your missing out on!

[This review was collected as part of a promotion.] This oil is great! One of the best decisions of ever made was changing my own oil. Pennzoil is always my go to brand. Their oil is top notch and always gets the job done. I will be using pennzoil for the foreseeable future and I recommend this product for anyone looking to do an oil change.

[This review was collected as part of a promotion.] I switched over to this Pennzoil Full Synthetic oil for my older riding lawn mower. It's better for the engine and I love the fact I have to change it less frequently. My mower seems to run smoother since the switch. Pennzoil is a brand I trust and will continue using. Highly recommended!

[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 have used different brands of oil in my vehicles over the years but the brand I keep coming back to is Pennzoil. Their full synthetic oil keeps my engine running smooth and I seem to get better fuel economy with it. I'll keep using the brand I trust.

[This review was collected as part of a promotion.] I have recently switched my car over to full synthetic Pennzoil. It was certainly an easy process to do. It seems to make things run nice and smooth. I would definitely recommend this product and brand.