There is either, voids the warranty or doesn't. "Okay" is too vague a concept subject to source of info.
Unless it is expressly stated that changing the ATF voids your warranty, it doesn't. The *correct* Valvoline product or Ford's does not matter, but as some have already mentioned, I would not lie but also wouldn't go out of my way to tell them you used Valvoline's product. That just introduces a variable subject to human interpretation error.
They cannot legally require you to use a Ford specific fluid to maintain the warranty, that goes against the Magnuson-Moss Warranty Act, but it must be a fluid rated as compatible. Extreme example - you can't put BBQ sauce in instead and expect to get away with it.
Do get the car into a shop now. Do make sure it is clearly documented what your observed problem was at the point of bringing it to them, what YOU wanted documented, not the service manager's reinterpretation of your words which can sometimes be a problem later. Make 100% sure that the initial work order copy given to you is stated correctly as to the issue, do not wait for the to give you something later when they are finished which could be all kinds of nonsense and even a bill. This is a dated proof of taking it in for a specific problem.
Unless it is expressly stated that changing the ATF voids your warranty, it doesn't. The *correct* Valvoline product or Ford's does not matter, but as some have already mentioned, I would not lie but also wouldn't go out of my way to tell them you used Valvoline's product. That just introduces a variable subject to human interpretation error.
They cannot legally require you to use a Ford specific fluid to maintain the warranty, that goes against the Magnuson-Moss Warranty Act, but it must be a fluid rated as compatible. Extreme example - you can't put BBQ sauce in instead and expect to get away with it.
Do get the car into a shop now. Do make sure it is clearly documented what your observed problem was at the point of bringing it to them, what YOU wanted documented, not the service manager's reinterpretation of your words which can sometimes be a problem later. Make 100% sure that the initial work order copy given to you is stated correctly as to the issue, do not wait for the to give you something later when they are finished which could be all kinds of nonsense and even a bill. This is a dated proof of taking it in for a specific problem.
Last edited: