D.o.D LS perfection
From Bradley Caruthers of Lakeland, Florida on 1/19/2020.

If you have a Chevy with Displacement on demand this stuff is a must. I didn't notice how little the the DoD was engaged until about a week after I installed zMAX in my 2012 5.3 Suburban. Now it will hold 4 cylinders anytime I'm not under increased load. This has increased the MPG from 14.5 avg. to 18 avg. If someone would have told this to me ahead of time I would have laughed out loud. Something else I noticed is the trans runs about 15° cooler unloaded and 30° when pulling a trailer. Again if you have a chevy with DoD give this stuff a try. You may be pleasantly surprised as I.

Response from zMAX: Glad you are getting great results using zMAX, especially with a load. Thanks for being a zMAX customer!

Highly recommended
From Mike Bally of Jenks, Oklahoma on 1/13/2020.

I’ve used zMAX for years in my fuel and oil with no issues.

Response from zMAX: Thanks for being a long-time customer!

Multi Use
From Anonymous of Freehold, New Jersey on 12/26/2019.

Used in cars and lawn equipment

It works!!
From The Sarge of Toms River, New Jersey on 11/21/2019.

I been using this product for some time now. I have used in Domestic and Asian production vehicles both new and over 100K with great noticeable results!!

Response from zMAX: That's great! Thanks for being a zMAX customer!

270,000
From Southwest of Chino, California on 11/21/2019.

Bought a new Tahoe in 2004, have been using zMAX every 3rd oil change. Now in 2019 have over 270,000 miles and runs like a new SUV. Thank you zMAX...

Response from zMAX: Here's looking forward to another 270k miles! Thanks for being a zMAX customer!