And ford credit offers certain percentage rates for certain amounts of months but let me tell you a little story I just learned (as did the dealer).
My last 5 cars have been financed through ford credit and always preferred customer... ford credit no longer has preferred customer program... they use a tier system according to your credit. while they offered 3.74% and I've had a stellar payment history with them and credit cards. my credit score for some reason unknown to anyone it seems is not, altho absolutely everything on it is solid ones with everything. so now ford who pre approved me at 3.9% the end of september when I ordered my car suddenly said 2 days ago when I picked it up that I'm a tier 2 and it'll be 4.9% and no matter the amount of pointing out I've been making 500$ payments on 450$ a month car payments and never missed one, the guy became more of an ass and got hung up on. Funny thing, called the bank and within 5 minutes was approved at 3.75 for 60 mos. We no more than got off the phone with the bank and ford credit asshat called back, all I head the dealer say was if you cant beat 3.75 quit wasting my clients and my time... and he got hung up on again.
Pretty sad when the dealership has to protect their clients...
Make sure if you have things preapproved they are in writing, not just a "he's good to go" over the phone. As they say, things can change without your knowledge and a persons word isn't worth shit anymore.
Sad, I've been a loyal ford credit customer since 02, then they pull crap like this on me. I will price and get pre-approval for the amount with a bank before even dealing anymore.