Used it years in my truck and kept it running well past the normal life of the truck.

I Use this in my Mower & in my Truck it worked very well

I use this oil all season on my mower and it works flawlessly!

My father and I have been dedicated to Pennzoil for years now and work great and has a fair price!

Good oil, doesn't burn as much as other oils in older engines

I use Pennzoil oil in my Jeep, and my engine loves this oil. It runs smooooth!

If you have an older car, you can't beat this oil for cost effectiveness!

Used this in a 1986 Chevy S10 Blazer. Provided good lubrication propreties, changed the oil every 3,000 miles, no problems.

[This review was collected as part of a promotion.] Worked for me. Did not notice any mpg improvement.

Use the 10W40 in my 66 Dodge Polara w/383 V8. 3,000 miles on it so far and still looks like new oil.