does anyone here know a sure way to enhance the fuel mileage of i30's...i wanna make sure that the vq is spending all the gas im buying...and its a little bit low....the 21mpg/hwy is kinda a drag....can u guys help me please i just got it sunday and its already eating gas like nothing i've ever driven before...

 

Clean airfilter, new sparkplugs and energysaving syntethic oil 5w30 or 0w30 to start with. Also put in an extra 2-3 psi in the tires. Also the VQ has fuelcut over 1500rpm. Say your rolling down a hill in "D" and tach shows 1300rpm the engine is still consuming fuel. But say you turned the OD off and now the tach shows 2100rpm, the system turns off fuel sypply and you save a few drops. I get over 30mpg on highway, but then again mine is only a 2.0 V6.

 

I thought the point of Overdrive was to save gas being that you're free rolling, such as goin down a hill or on a Highway. *confused*

 

Yes of course! But let's say it's a steeper hill where you would have to brake to stay within speedlimits it would be better to turn OD off get higher rpm's so the ECU turns off fuel supply.(and keep the speedlimit ) I think you have a term for that: Overrun?? (Not sure)

 

Oh wow. Pretty damn smart.

 

what kind of spart plugs do i get?also what tools do i need to replace them by myself...

 

NGK Platinum. Same as OEM. Try eBay for the cheapest prices, or go to the dealer.

You just need a socket set with an extension bar and a spark plug socket.