Add 12oz zMAX Engine Formula to engine oil after each oil change. Will not overfill reservoir. Add 12oz zMAX Fuel Formula to fuel tank (gasoline or diesel) with at least 1/4 tank of fuel. Use every 6 months or 6,000 miles.
Average Rating: (From 25 Reviews):
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Simple to Use
From Paul Mahoney of Colorado Springs, Colorado on .
Seems like a no-brainer purchase. I saw it on Truck U and liked what I saw. It’s now in my 2018 Ram 2500 diesel.
GREAT!!!
From Tim B of Pittsburgh, Pennsylvania on .
Buy this and add it to your older model vehicles. Makes a huge difference in performance.
ZMAX
From Anthony Wong of RCH CUCAMONGA, California on .
Egg-cellent. Used products continuously for 20 years primarily for SMOG. I have over 450 K miles on my Toyota Camry (Original Engine) since I started using the 4 item box.
high rec.
From Thomas Balser of Paulding, Ohio on .
outstanding performance I have used it for years.... currently have a 2009 toyota highlander with 185,000 miles and have never had any problems .,.. only regualar maintenace same for a 2003 Toyota we had previoulsy!
Great product
From Bill Broda of Greenville, Wisconsin on .
Zmax is great, my car runs quieter and cooler.
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