Engine and Fuel Micro-Lubricant
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Get a $7 Rebate on this Z-Max Engine and Fuel Micro-Lubricant! See rebates page for details.

Z-Max Engine and Fuel Micro-Lubricant

Part No. 51-011 Warranty  
zMAX® engine and fuel micro-lubricant soaks into metal, reducing engine deposits for increased gas mileage, extended engine life and greater horsepower.

Product Features:
  • Works with all motor oils, gas and diesel fuel
  • Reduces friction and increases horsepower
  • Dissipates engine heat and helps improve or restore gas mileage and reduce emissions in older cars and helps maintain gas mileage and emissions in newer cars
  • Extends engine life by reducing engine deposits
  • Made in USA
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Application Method:Pour Into Engine Oil and Fuel Tank
Engine Components Cleaned:Internal
Frees Sticking Hydraulic Lifters:Yes
Removes Sludge/Varnish:Yes

REVIEW SNAPSHOT®

by PowerReviews
Z-MaxEngine and Fuel Micro-Lubricant
 
4.5

(based on 32 reviews)

Ratings Distribution

  • 5 Stars

     

    (23)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

91%

of respondents would recommend this to a friend.

Pros

  • Improves vehicle performance (24)
  • Reduces wear (20)
  • Runs clean (20)
  • Safe (18)

Cons

    Best Uses

    • Car (22)
    • Regular use (17)
    • Truck (17)
    • RV (6)
      • Reviewer Profile:
      • Auto enthusiast (12), Casual driver (5), Mechanic (5)
      • Reviewer Profile:
      • Auto enthusiast (9), Casual driver (6), Mechanic (5), Truck enthusiast (5)

    Most Liked Positive Review

     

    Seems to work

    I added zMax to my 2008 BMW 128i to see if it would quiet a noisy lifter and it did! This is a low mileage used car and with the BMW long intervals for...Read complete review

    I added zMax to my 2008 BMW 128i to see if it would quiet a noisy lifter and it did! This is a low mileage used car and with the BMW long intervals for oil changes, no telling how few oil changes this car has had. zMax seems to have done the trick and the slight tapping noise is now gone. The engine now purrs like it should. Gas mileage also improved significantly, but not sure if that is just temporary due to better driving habits. I'm adding xMax to my other cars to see if I get the same positive benefits. Not sure I'll continue at the recommended intervals due to the price, but do plan to continue to use periodically.

    VS

    Most Liked Negative Review

     

    "Too much whiz and not enough bang"

    Things that aren't so great about it include price, its a gimmick product, and the manufacturer can not prove it works. The manufacturer has rigged test in there favor to prove how this...Read complete review

    Things that aren't so great about it include price, its a gimmick product, and the manufacturer can not prove it works. The manufacturer has rigged test in there favor to prove how this lubricant works.

    Reviewed by 32 customers

    Sort by

    Displaying reviews 1-10

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    5.0

    This makes so much difference

    By pilot47

    from Williamsburg, VA

    About Me Auto Enthusiast, Daily driver

    Verified Buyer
    Level 1

    Pros

    • Engine Immediately Runs S
    • Improves Vehicle Performance
    • Reduces Wear

    Cons

      Best Uses

      • Car

      Comments about Z-Max Engine and Fuel Micro-Lubricant:

      Great effective product

      Comment on this review(earn points)

      (1 of 1 customers found this review helpful)

       
      5.0

      Love this item!

      By Bruno

      from North Miami, Fl

      About Me Casual Driver, Highway Miles

      Verified Buyer
      3 or more reviews submitted

      Pros

      • Improves Mpg
      • Improves Vehicle Performance
      • Reduces Wear
      • Runs Clean
      • Safe

      Cons

        Best Uses

        • Car
        • Regular Use
        • Truck

        Comments about Z-Max Engine and Fuel Micro-Lubricant:

        I've been a proud user of this product for about 8 years now , using this on all my vehicles about twice a year. I had a tercel and a focus both of age running smooth with regular maintenance and this additive, there are enough satisfied customers and studies about this product for you to make the wise choice and start using this as a critical part of your vehicles regular maintenance. I love this product.

        Comment on this review(earn points)

         
        4.0

        I would buy this product again

        By Sam

        from Woodstock ,Ga.

        About Me Auto Enthusiast

        Verified Buyer
        Level 1

        Pros

        • Improves Vehicle Performance
        • Reduces Wear
        • Runs Clean
        • Safe

        Cons

          Best Uses

          • Car
          • Regular Use
          • Truck

          Comments about Z-Max Engine and Fuel Micro-Lubricant:

          Cleans engine parts and adds performance to engine.

          Comment on this review(earn points)

           
          5.0

          great product use again

          By cads67camaro

          from bay city mi

          About Me Auto Enthusiast, Mechanic

          Verified Buyer
          Level 3

          Pros

          • Improves Vehicle Performance
          • Reduces Wear
          • Runs Clean

          Cons

            Best Uses

            • Car
            • Regular Use
            • RV
            • Truck

            Comments about Z-Max Engine and Fuel Micro-Lubricant:

            great product

            Comment on this review(earn points)

             
            1.0

            Don't waste your money

            By nypigskin

            from Long Island, NY

            About Me Truck Enthusiast

            Verified Buyer
            Level 1

            Pros

              Cons

              • Ineffective

              Best Uses

                Comments about Z-Max Engine and Fuel Micro-Lubricant:

                Paperwork that comes with product says their is a class action law suit against company for false claims.

                Comment on this review(earn points)

                 
                4.0

                Z MAX

                By VAROOOOM

                from BROOKLYN NY

                About Me Auto Enthusiast

                Verified Buyer
                Level 1

                Pros

                • Improves Vehicle Performance
                • Reduces Wear
                • Runs Clean

                Cons

                  Best Uses

                  • Car
                  • Muscle Car Plymouth 440
                  • Regular Use

                  Comments about Z-Max Engine and Fuel Micro-Lubricant:

                  USE THIS 2 TIMES PER YEAR...FOR GAS AND OIL TREATMENT

                  Comment on this review(earn points)

                   
                  4.0

                  Better Milage

                  By Rancher350

                  from Southern Ohio

                  About Me Auto Enthusiast, Casual Driver, Farm And Fleet Operator, Mechanic, Truck Enthusiast

                  3 or more reviews submitted

                  Pros

                  • Great Mpg Increase

                  Cons

                    Best Uses

                    • Car
                    • RV
                    • Truck

                    Comments about Z-Max Engine and Fuel Micro-Lubricant:

                    This product(two oil treatments of one bottle) gave my 05 Cummins a increase in mpg from 15.8-18.2 before and to 17.6-21.2 about a 3 mpg increase more than paid for it self on the 2000 mile trip i took, Now i could not tell any difference in preformance off hand,but put on a dyno would have i am sure!

                    I sujested to my dad for his Duromax and with only 1 oil treatment on his 8000 mile trip he got 2+ mpg increase.

                    Have not used the fuel treatment getting it today.

                    Comment on this review(earn points)

                    (1 of 1 customers found this review helpful)

                     
                    5.0

                    Z Max is on line

                    By Scooter

                    from Shelby, NC

                    About Me Motorcyclist

                    Pros

                    • Improves Vehicle Performance
                    • Reduces Wear
                    • Runs Clean
                    • Safe
                    • Works Great In Old Cars

                    Cons

                    • 055 Oz Online 178 Stor

                    Best Uses

                    • Car
                    • Mc And Cars
                    • RV
                    • Truck

                    Comments about Z-Max Engine and Fuel Micro-Lubricant:

                    Get it buy the quart for futher uses, use it in mowers, motorcycles, old cars. Reapply every 6K mile or every other oil change.

                    Comment on this review(earn points)

                    (5 of 9 customers found this review helpful)

                     
                    5.0

                    Well worth the money.

                    By fob777

                    from Duluth GA.

                    About Me Casual Driver

                    Verified Buyer
                    Helpful Reviewer

                    Pros

                    • Easy to use
                    • Great product
                    • Improves Vehicle Performance
                    • Reduces Wear
                    • Runs Clean
                    • Safe
                    • Works Really Well

                    Cons

                      Best Uses

                      • Car
                      • Regular Use

                      Comments about Z-Max Engine and Fuel Micro-Lubricant:

                      This is a great product. It's easy to use. Just add it to the crankcase and go. Well worth the money.

                      Comment on this review(earn points)

                      (3 of 8 customers found this review helpful)

                       
                      5.0

                      If it's good for a cobra snake well.....

                      By Donny

                      from Eden, Ga.

                      About Me Auto Enthusiast, Casual Driver, Mechanic, Truck Enthusiast

                      Verified Buyer
                      Helpful Reviewer

                      Pros

                      • Improves Vehicle Performance
                      • Reduces Wear
                      • Runs Clean
                      • Safe

                      Cons

                        Best Uses

                        • Car
                        • Regular Use
                        • RV
                        • Truck

                        Comments about Z-Max Engine and Fuel Micro-Lubricant:

                        Cost alot but well worth it to me

                        Comment on this review(earn points)

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                        Do you have questions about this product?(earn points for answers!)

                         

                        Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                        14 Questions | 17 Answers
                        Displaying questions 1-10Previous | Next »
                        • Q:

                          how often do you add zmax to your engine oil ? every oil change?
                          Asked on 5/6/2014 by Randy from United States

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Hi Randy, good question! Pour zMAX Fuel Formula (12oz.) in the fuel system with at least 1/2 tank of gas or diesel fuel. Pour zMAX Engine Formula(12oz.) into your crankcase. Works with all engine oils (synthetic, multi-grade or mono-grade including diesels). zMAX does not replace your regular oil. zMAX will not overfill your normal oil level, because it soaks into metal. Start engine and bring to operating temperatures after installation. Recommended every 6 months or 6,000 miles, whichever comes first.

                            Answered on 5/6/2014 by Steve from AAP
                        • Q:

                          I have a 2 cycle gas engine in my golf cart. I believe the piston and rings are glazed over. Do you have a product that will remove this problem and improve the compression? Thank You.
                          Curtis Bedore
                          Asked on 3/25/2014 by Curt from Idaho

                          1 answer

                          • CUSTOMER CARE

                            A:

                            I'm happy to help, Curt! Z-Max does make a small engine formula that may help. I also know that Sea Foam is a very popular treatment that claims to remove varnish, carbon and gum from the engine and is made with 100% petroleum products. The results of any engine treatment may vary and cannot be a guaranteed fix. Even after treatment you may still find it necessary to disassemble the parts and clean them separately.

                            Answered on 3/26/2014 by Heath, ASE Parts Specialist from AAP
                        • Q:

                          I have a 2001 mercury sable 3.0EFI DOHC I just changed the oil.can I just add it to the oil and fuel
                          Asked on 1/26/2013 by wayne from arlington tx

                          1 answer

                          • CUSTOMER CARE

                            A:

                            The Z-Max Engine and Fuel Micro-Lubricant (Part No. 51-011) does not replace your regular oil. Using zMAX will not overfill your normal oil level, because it soaks into metal. Simply pour zMAX into your fuel system (12oz.), your engine (12oz.), and transmission (4oz.) or have zMAX installed by your mechanic at your next oil change. The bottles are clearly marked. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                            Answered on 1/28/2013 by Steve from AAP
                        • Q:

                          does z-max stop smoking in a vehicles
                          Asked on 11/1/2012 by debbie from arab,ala.

                          1 answer

                          • CUSTOMER CARE

                            A:

                            The unique ability of zMAX to soak into metal and reduce engine deposits results in Increased Gas Mileage, Improved Performance, Extended Engine Life, Reduced Emissions, Increased Horsepower. This product may be used as a fuel additive both for gasoline and diesel fuels. When used as a diesel fuel additive, the following statement applies: This diesel fuel additive complies with the federal low sulfur content requirements for use in diesel motor vehicles and non-road engines. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                            Answered on 11/2/2012 by Steve from AAP
                        • Q:

                          i have a 2004 stratus i bought at an auction an it haz 174k milez on it an i waz wanting to use thiz in it. and i would also like to use a synthetic or blended oil in it aswell. will thiz product be ok to use in conjunction with a blended or full synthetic oil? or doez anyone have any recommendationz??? thankz for your time an look forward to your reply.
                          Asked on 9/17/2012 by louny2ns, soundz like looney tunez from Seffner Fl.

                          2 answers

                          • A:

                            Yes, it is OK to use with any oil.

                            Answered on 1/22/2014 by repo master from TEXAS
                          • CUSTOMER CARE

                            A:

                            Yes, the Z-Max Engine and Fuel Micro-Lubricant (Part No. 51-011) is compatible with synthetic and conventional oils. The unique ability of Z-MAX is to soak into metal and reduce engine deposits. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.

                            Answered on 9/18/2012 by John the Car-Doc from AAP
                        • Q:

                          I just recently developed a slight lifter noise. I changed the oil using 5/30 Royal Purple. This helped but still a slight tick. My car is a 1999 Corvette with the LS1, it only has 45,000 miles. Do you think your oil additives might help with the problem? Thanks!!!!!!!!!!!!!
                          Asked on 9/6/2012 by Quick

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Sorry, without the presence of your vehicle we would not be able to properly diagnose it nor provide you with a 100% answer. We would suggest that you take your vehicle to a certified mechanic for further diagnosis.

                            Answered on 9/7/2012 by Steve from AAP
                        • Q:

                          I have heard that the Z-Max engine treatment and the fuel traetment are exactly the same and can be used interchangeably (i.e., the fuel treatment can be used in the oil and the engine treatment can be used in the fuel system). Is that correct?
                          Asked on 4/13/2012 by M-Dog

                          1 answer

                          • CUSTOMER CARE

                            A:

                            This Z-Max Engine and Fuel Micro-Lubricant with Part No. 51-011 may be used as a fuel additive both for gasoline and diesel fuels. When used as a diesel fuel additive, the following statement applies: This diesel fuel additive complies with the federal low sulfur content requirements for use in diesel motor vehicles and nonroad engines. Simply pour zMAX into your fuel system (12oz.), your engine (12oz.) or have zMAX installed by your mechanic at your next oil change. However zMAX does not replace your regular oil, and using zMAX will not overfill your normal oil level because it soaks into metal.

                            Answered on 4/20/2012 by John the Car-Doc from AAP
                        • Q:

                          Can I use this on my 2000 Mazda 626 LX? (P.S. I have a 4 cylinder 2.0L engine.)
                          Asked on 12/28/2011 by Ant the Newbie from Silver Spring, MD

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Yes, you can use this lubricant in your 2000 Mazda 626LX.

                            Answered on 12/28/2011 by Steve from AAP
                        • Q:

                          My car (98, lexus es300) is leaking out of engine. I will add 'Lucas Oil Products Engine Oil Stop Leak' product. Is it possible to use 'ZMAX Engine Micro-Lubricant' and 'Lucas oil stop leak' together at same time with synthetic oil?
                          Asked on 12/8/2011 by Eric's bob from chandler, AZ

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Yes, ZMAX Engine Micro-Lubricant' and 'Lucas oil stop leak' can be used together at same time with synthetic oil.

                            Answered on 12/10/2011 by Vincent from AAP
                        • Q:

                          Will my 2010r8v10 with 4000miles benefit from using Z Max
                          Asked on 11/10/2011 by Anonymous from Montreal Quebec canada

                          1 answer

                          • CUSTOMER CARE

                            A:

                            Yes, this should work fine.

                            Answered on 11/10/2011 by Steve from AAP
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