M35 18000 mile tune up

[M35Driver]

Is this tune up worth it for the money. My car was a recent purchase at 14,000 miles. Car was checked out by dealer. Can this improve mileage? Mine is not too good. 15 city, may 20 on the highway.

Jim

[macmanks]

There is absolutely no chance you need a tune-up at this point. Considering the winter fuel mixture, outside air temperature, and the normal fuel economy of the M35 - your mileage sounds very normal. Especially if you use an ethanol mixed fuel instead of pure Gasoline. My experience with 10% ethanol mixtures easily results in a 1-2 mpg loss by itself.

Enjoy your M for the great ride and immediate acceleration and forget about mpg. This car was not designed for fuel economy.

[NightWatch]

Hello to a fellow 2008 M35er Infiniti engines - as already stated - no not really require a "tune up". Spark plugs get replaced at 100K miles. The ECM keeps the engine running as effeciently as possible. To maintain your warranty though you should follow the maintenance schedule in your owner's manual.

[M35Driver]

Thanks for the responses two responses. Great car.

JM