I have been using Castrol for many years and I has kept our older cars running perfectly. The oldest has over 180000 miles on it and has no sludge buildup at all and runs so quiet you almost cannot hear it.

First off you have to have a vehicle to use this product. All you gotta do is unscrew the top off and pour the liquid in the engine where you have a screw cap that reads 710 remove the 710 cap before you pour. I guess I gotta talk about the benefits bout usin this product here we go. Your vehicle really needs this stuff to operate cuz one time I cleaned the inside of my engine cuz it was dirty and my brand new 2020 Ford truck wouldn't work. And by the way I hear Caster oil is coming out with a Pumpkin spice flavor this Fall and I'm eager to try it. Now is the time to tell you the bad stuff bout this product and when I find one I'll ya know.

This is a great oil to use on cars with high mileage. I have tried other brands of oil but have switch back because it doesn't work as well as Castro oil works. I would highly recommend this for older vehicles.

My 2005 suburban has over 292000 miles on the engine - the only time I haven't used Castrol is when I couldn't find it ! I'm sure it has helped keep it alive and running !!

Definitely recommend this brand. The price is just right it's not the cheap bad stuff but not expensive overpriced like others! My cars run great using this brand

I've regularly used this oil in a 2004 F150. It performs well and the engine has over 275000 miles. It's the original engine for the truck. I've been very pleased with this oil for years and will continue to use. FYI I change my own oil at home.

I use this in my grandfather's high mileage Kia that has to have a quart about every two weeks...I highly recommend this product I usually can catch it on sale at the Dollar general store for a 1 cheaper than other oils

I've used this brand since I've been driving and have always been satisfied with it's performance. My dad has also always used it and recommended it to me. It's not the lowest priced but it's less expensive than some other brands.

Works great in keeping my husband's truck running smooth and steady. He drives a lot to and from work and it lasts a good while before needing changed.

Does the job without breaking the bank. We have to have 10 qts just to change the oil in the truck so it's nice when it doesn't cost $50+ just for the oil before we even count the filter and disposal (and that's with free labor).