Lexus RX 2004-09 :: Sudden Drop In MPG On 2007 RX350
Jun 15, 2014
I have a 2007 RX350, now at 110K miles, bought at 80K miles. I recently notice a sudden drop in mpg about 5K miles back (it might happen before that but I did not notice). Previously, the car gets around 25MPG on average, now it can only get 21 - 21.5 mpg, my range of a full tank drops around 60 miles. My route of driving everyday is pretty much the same. I have tried to change gas branch, using fuel system cleaner (Chevron Techron), check tire pressure but no luck.
What might be happening with the car that makes this significant drop in mpg?
I changed power steering rack and pinion at a dealer also about 5k miles back and at that point I had a dispute with a service consultant there. He made me drive back and forth a couple times without telling me that the part hadn't arrived yet (the car was on extended warranty). I then emailed directly to his boss. After that he treated me really well: gave me a most recent model loaner car for a week and did not charge for gas, and waived the deductible. Now I notice the MPG drop so I kind of link with this event and put him in doubt . Well, I'm not sure if he could do anything to the car since he's not the technician but still ... Can a guy put something to a car to reduce its fuel efficiency?
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