i have a 95' geo tracker 5spd. it has ben on running high mileage for years. no engine noises or leaks. this stuff works great. does was it says.

It lasts longer and keeps my engine running smoothly. I won't get an oil change if they don't have Pennzoil High Mileage.

[This review was collected as part of a promotion.] We buy this for my wife's car and it works great!!

[This review was collected as part of a promotion.] have 245,000 miles on truck,all of them with Pennzoil H.M.. 60 lbs of oil pressure!!

I noticed this oil does not break down and gum up engines. It holds its integrity and that was noticeable at both oil changes and engine rebuilds.

I have a 2003 Chevy Silverado 4dr HD with 160,000 miles on it with no major motor wear, Thank You for making a product for high mileage vechiles.

I use this stuff in my car.it started knocking 6months back.now my car runs great, and i think it will be the only oil I'll use from now on..

[This review was collected as part of a promotion.] Keeps the engine running excellent aith no problems my truck has 250000 miles

[This review was collected as part of a promotion.] Love the preformance of the product for our high mileage vehicle

271,000 miles and it just keeps going! Original engine still internal very clean. Never opened up, but dipstick looks like new. Never babied.