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Just bought this 07 Lexus 460 with 140,000  miles and getting horrible gas mileage ...does anybody know if they've had better gas mileage with a certain set of Spark plugs? Anything else I can do??? besides the K&N air filters, regular oil changes, fuel injector cleaner,....was going to have the fuel filter changed but it's in the tank so not going to worry about that.... thanks for the help!

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My car gets 30-mpg on the highway and averages 22 around town with Premium Gas.

If you run an Ethanol Blend your mileage will go down drastically. E-10, E-15, etc..I try to stay away from these.

Not only does your mileage go down but it is more harmful (corrosive) to your equipment.

Environmentalists would have you believe making fuel from corn is better than fuel from oil--it's really not so.

There are more issues with Ethanol than we can go into in this forum.

Check out this article http://www.fuel-testers.com/ethanol_fuel_disadvantages.html

Also, there could be other mechanical issues with your car.

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