After doing some research I found that gasoline quality is very poor right now. And I am looking for a fuel additive that will help keep emissions down as well as increase MPG; however, I want to know if these products will void my warranty.
If the vehicle does not have two hundred thousand miles on it I would run synthetic oil. We see a marked improvement in the fuel mileage of about 2 MPG. You can also extend your service intervals out from 3,000 to 5,000. When you do the math, the extra two thousand miles between oil changes and the additional two miles per gallon increase in fuel economy really add up. My wife gets better fuel mileage in our car than I do. Her driving habits are different than mine. I tend to be in a hurry and that consumes more fuel. She takes her time and get better fuel mileage. You are the best judge on that issue. If you have over 80,000 and the plugs have not been changed I would do so. Keep a clean air filter also. Service the Transmission between 30 and 50,000 should be serviced. Follow manufactures recommendations on that. I would also recommend the synthetic transmission fluid also. Anything that can reduce friction will also reduce heat. Good luck.
Never heard of additives voiding a warranty. Really couldn't prove if you were using an additive anyways.
The answer to that question is simply no. No OEM can void a warranty due to use of a product. This is actually federal law the Magnuson/Moss Warranty Act. Unless a manufacturer has proof that an additive does not meet the specification of its product it cannot void the warranty. The testing to prove that an additive does not meet the specification is 1.5 million for diesel engines and over $500,000 for gasoline. A series of tests are run called Sequence. Unless an additive is seriously creating damage no oil company or OEM will spend the time or money to test an additive. Also, because you would have to test each additive with every lubricant the cost would be prohibitive. So for this reason the oil manufacturers and oil companies put out a statement that the use in of itself of an additive does not void the warranty. They reserve the right to test but this would be rare as most additives have already gone through a battery of tests to prove they are beneficial. Additives do not void a warranty and any one that says they do is incorrect!
