I put high mileage in my car for many years and never had a problem with my engine. Only problem I had was getting rid of my perfectly good well loved car that still had lots of life left in it thanks to this oil!

[This review was collected as part of a promotion.] My husband uses this in alL our high mileage vehicles and he swears by it. He has a very old Chevy blazer that still runs great

[This review was collected as part of a promotion.] I love my old trucks,and tractors but they need special care with high mileage and the protection this gives i'll keep them going Longer.

Okay so before I started using thus I used alot of other kinds.but finally my friend told me about how good it was for high mileage cars so I started by putting it in my honda to see and it works miracles so now I I also use it in my 83 camaro

I have used Penzoil oil in my 93 chevy s10 since it was new now has over 200000 miles still runs great and uses no oil between changes. This tells me to never use any other brand of oil in my vehicles or even my lawn tractor!

[This review was collected as part of a promotion.] Product has just the right formula made for older & high milage vehicles to make the perform properly & the best of all it is American made.

This is the oil I use in my 1989 Buick Century. This car has been the best car in terms of dependability and I fully believe that a huge part of this is the wonderful oil I have used in my regular oil changes!!!

I have used this every time I have changed the oil in my truck for 4 years now my truck has over 210,000 miles and your oil lasts and makes my truck run great. And for that I thank you!

I use this product in my one ton gas truck. I like how the oil hardly looks dirty after 4000 miles. If I do alot of towing I change at 3000 miles. I like this product and I use your full synthetic in my car

[This review was collected as part of a promotion.] I've used this in my truck ever since my truck hit 200,000 miles and now it's over 255,000 and hasn't missed a beat.