It's not a problem in the slightest. Just drive it.
Inside the combustion chamber, regular and premium are effectively indistinguishable since both explode, forcing the pistons down the cylinder.
The REAL advantage to "super/premium" is the higher octane rating.
A higher octane fuel explodes more slowly or evenly.
High compression engines need premium, since the higher compression causes fuel to explode more rapidly. If the fuel explodes too rapidly, the engine "pings", not just making the characteristic sound, but it can also cause damage.
Premium fuel eliminates pinging in high compression engines, and delivers the power of those explosions more evenly.
High compression engines are not as popular today, since engineers have been able to deliver more power and efficiency with a lower compression engine.
Using premium fuel in a modern, low compression engine will only burn a little slower and not damage the engine at all.
It's just a waste of money to use premium in a low compression engine.
Nothing happens, except your wallet will be lighter.
When you mix regular unleaded fuel and unleaded plus fuel in a gas tank it results in a mixture of fuel with an octane rating higher that regular unleaded fuel but lower than the octane rating of unleaded plus fuel.
You get a lower gas mileage because it needs more fuel at one time to reach the maximum potential, and it still doesn't have very good performance.
regular gas IS unleaded...
The 2009 Lincoln MKS runs on premium unleaded (recommended).
Regular unleaded gasoline.Regular unleaded gasoline.
The 2011 Lincoln MKZ runs on regular unleaded.
you will be ok MIGHT notice a very s;ight decrease in performance
Regular unleaded.Regular unleaded.
regular unleaded.regular unleaded.
You will risk doing damage to the catalytic converter(s).
The 2012 Lincoln MKT runs on regular unleaded.