Directions for Use: 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.

Zmax (azithromycin extended release) is a macrolide antibiotic used to treat community acquired pneumonia and sinusitis caused by susceptible bacteria.

6,000 miles Easy to use, add zMAX Micro-lubricant to your engine oil and fuel (gasoline or diesel) every 6 months or 6,000 miles.

It starts as highly refined mineral oil, not a synthetic, and the molecular structure is further refined to create what zMAX calls a “micro-lubricant.”

But zMAX actually works to fight carbon build-up the first time you put it in and every time afterwards. And it doesn't contain solids like Teflon, PTFE, zinc, and/or moly to try to supplement the motor oil. Read more of how zMAX works.

Directions for Use: For 10-24 gallon tanks, add 12oz zMAX Fuel Formula to at least 1/4 tank of fuel every 6 months or 6,000 miles. For over 24 gallon fuel capacity, add 16oz zMAX Micro-lubricant, using the zMAX Multi-Use 32oz bottle, pouring half into your fuel tank and saving the other half until next treatment.

No matter what year your vehicle is, it needs zMAX Micro-lubricant® to disperse carbon build-up in your engine, fuel system and transmission. This helps improve performance, extend engine life and reduce emissions.

And reduce emissions.

The difference with mineral oils resides in the transformation process: synthetic oil undergoes more sophisticated modifications. Features of synthetic oils: Synthetic oils contain fewer impurities than mineral oils. Synthetic oils are chemically modified.

The difference between light and heavy mineral oil (the low- and high-viscosity variants, respectively) is that the light variant contains more cyclic (saturated) molecules that prevent the consistent build-up of the palisade. Light mineral oil is therefore less occlusive than heavy mineral oil.

Zmax starts working. Days 2 – 3: As with most antibiotics, you may not feel better right away. After Day 3: Zmax continues to work over time. If your symptoms are not better, call your healthcare provider.

No matter what year your vehicle is, it needs zMAX Micro-lubricant® to disperse carbon build-up in your engine, fuel system and transmission. This helps improve performance, extend engine life and reduce emissions.