Review by slashsplat
February, 15 2014
Pros: Saves gas, and money
Cons: Have to replace at each oil change
Review by arc540i
November, 02 2012
Pros: Saved my buddy's motorcycle engine!
Cons: A bit pricey...but actually works vs. the other "additives" that do NOT work!
Review by gmcyukon
July, 14 2012
Pros: I USE ZMAX AND TELL MY FRIENDS ABOUT IT GOOD STUFF
Cons: COST YOU SHOULD REALLY WORK ON BRINGING IT DOWN
Review by q1qazaq1q
June, 30 2012
Pros: nice bottles
Cons: cost and mileage lies
Review by enduser5017
November, 24 2011
Pros: NONE, not at all, would not recommend to any one........ pass this up
Cons: $25.00 for the engine treatment, and now $45.00 for an oil sending unit.
Review by bobo40
September, 22 2011
Pros: It extended the life of all my motors past 150,000+ miles
Cons: Need a price break on buying a case. Little pricey
Review by kshaffer
July, 19 2011
Pros: Worked for cleaning my engine.
Cons: Used after there was too much sludge buildup. Recommend for newer vehicles to prevent sludge.
Review by cartune
April, 18 2011
Pros: Super Great product! Love how fast it worked!
Cons: Well maybe the price, but from what I seen it do, well worth it!
Review by nacreous
October, 16 2010
Pros: Not known to cause AIDS.
Cons: Does nothing, yet costs money.
Review by richard4q
March, 02 2010
Pros: Easy-peasy to use.
Cons: It is sort of expensive, bit it really works well.
Review by someoldguy1
September, 06 2009
Pros: I highly recommend using Z-Max products
Cons: I think the price is too high.
Review by gearle0521
April, 25 2009
Pros: narrower claims, for example that zMax may restore fuel economy in older cars
Cons: see the report link above.
Review by carguy7777
March, 25 2009
Pros: easy to use
Cons: Completely unnecessary
Review by lordkhaing
February, 08 2009
Cons: $35 dollars for two bottles.
Review by gassaver62
December, 07 2008
Pros: THIS STUFF WORKS.. I used cruise control
Cons: I dont know of any
Review by bass32
March, 13 2008
Pros: Additives are junk.If you don't believe me read about it at the FTC's website.
Cons: Everything this stuff won't work
Review by ls1heli
January, 27 2008
Pros: Smoother running and documented increase in fuel mileage.
Cons: $32.99 every 6 months.
Review by fretbender
December, 08 2007
Pros: worked great for 14 years in all my cars
Cons: cost a lot
Review by maddawg00
October, 31 2006
Pros: Better engine response, smoother transmission shifting, better MPG than factory specs
Cons: Maybe a bit Pricey, OK very pricey, but you get what u pay for
Review by kingranch
September, 27 2006
Pros: Delivers what they say
Cons: Price is a little high & Doesn't do as much for new cars
Review by carmech11
September, 13 2006
Pros: You get to make someone rich
Cons: It isn't you.