http://www.ftc.gov/opa/2001/02/zmax1.shtm

Read it.

 

I see your logic flawed. If it causes corrosion then my engine should not have lasted. It should have been rebuilt. Also many additives state not to mix with other additives. So if something had been added in the past it could cause issues in the future.
I do beleive that regular maintenance will make an engine last but I am under extreme conditions. I live in south Florida and was driving 110 miles a day to work on the highway and in heavy traffic. I also was pulling a 20ft centerconsel boat and a 22ft flats boat weekly. So, would a regular oil change be enough but I can not see an additive hurting.

 

The tests show nothing about adding it one time and then the motor stopping. It does however promote corrosion, double the amount of oil alone. Did you tear down the engine before you sold it and check everything out to confirm that it did zero damage (caused corrosion, etc.) to the engine?

I have 200K on my 86 F150 and 250K on a 91 Cougar, both regularly maintained with no oil additives, but whose engines would (wouldn't know without tearing them down of course) be in better shape? If something has been proven to cause damage, I don't understand why people still defend it because "I've used it and nothing bad happened...that I'm aware of." I'm sure that when testing zMAX, the FTC had to look at the actual effects of it to have a federal lawsuit over it and win.

 

I dont see anything about a win it was only a vote by the FTC to file and that was in 2001 and it is now 2008 and still on the shelf and they still sell AVBLEND for aircraft. No issue there.

Lets look a Lucas (I have tried it)
Key Benefits
1)Increase oil life at least 50% longer (maby)
2)Reduces oil consumption (due to changine the viscosity of the oil so use a different grade at the same price)
3)Eliminates dry starts (same as #2)
4)Raises oil pressure(beacause of #2)
5)Increases power and miles per gallon( never seen a differance besides I actually got better MPG using factory recomended lower viscosity oil and for power. If you have bad compression from worn rings (see #2) a heaver weight oil will increase the compression)

So why use it sounds like snake oil to me. Maby Ill call in a complaint.

 

and your comments lend credence to my comments. You live in a hot climate, and you drive 110 miles a day. Your using your vehicle more than 95% of anybody. Your situation won't lend itself to corrosion. But take a case like me... I live in western washington. I don't drive my truck much. (anymore) I last put gas in it in April. My truck sitting there in the garage is a lot more likely to have corrosion problems. In your case, following Ford's recommendation (they designed the thing and have to warantee the thing) would be sufficiant. And the manufacturer even says DON'T USE ADDITIVES. What is so hard to understand about that? They know more than some penny ante company that is trying to make a buck. As far as the aircraft product avblend... why isn't the same blend on the street? I have heard no claims that it is the SAME product.

 

zMAX had to refund the money to everyone. I'd call that a loss, especially considering how much it was. They also had to change how they were advertising it.

As for Lucas, go ahead and file a complaint. IIRC, it has been shown to cause the oil to lose it's anti-foaming properties and let air into the oil turning it to junk. I do not and will not ever use any oil additives. The only thing that should be in the engine is oil, and for the best anti-wear and friction reduction, use synthetic. No $40 bottles of colored mineral oil needed or a tube of glue. My $.02 on it.