My gas mileage is decreasing. Anything I can do? Gets 14.5 mpg and used to get 17. Love car just not mpg

Asked by Sep 01, 2013 at 11:34 AM about the 1999 Lexus RX 300 FWD

Question type: Maintenance & Repair

3 Answers


Keep tires inflated to proper pressure, and car in good running order.


The RX300 we had started doing the same thing, Gave it a good tune up with platinum plugs changed all of the filters and an injector clean and my mileage went back to 20.4 at 55 mph. Speed limit out here is 55 unless you are on the interstate.

1 of 1 people found this helpful.

You need iridium plugs btw, not platinum.

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