The dealership told me i need spark plugs and to perform fuel injection service...$189 spark to get my gas mileage back up. Plugs fine ill get that but 189 for a fuel injection service i called another infinity shop and they said thats a waste of time and money what should i do? or better yet whats the best fuel cleaner to put in my tank that does a good job?

 

The only thing that I would recommend is cleaning your throttle body if it needs it. Other than that, it's a waste of money.
They will have to remove the intake tube to change the spark plugs and we clean the TB for free when we change plugs.
How much are they charging you to change the plugs?

 

Waste of time-get a bottle of Red Line Fuel Injector cleaner for $9...

 

That is what I use. Be aware that 1 bottle treats 100 gallons.

 

hahah nice wonder what happens if you use the whole botle in one sitting lmao