Mpg

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Old 12-04-11, 03:01 PM
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Mpg

My Girlfriend has an
2002 Lexus IS300, Manual Transmission, over 130,000 miles.
Her car eats gas like an SUV and im not sure what else to do.
Spark plugs replace a year ago
K&N air filter
tires replaced 3months ago
Oil is changed every 3,000 miles
what can i do to better her MPG??
 
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Old 12-04-11, 03:18 PM
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Welcome to the forums! What mpg is the car rated at? What mpg is she getting? Have you weighed her foot lately (right one)? The girl I dated in high school back in the 60's couldn't be beat, running a 57 Chevy, 348, 3 deuces, Olds turbo hydromatic tranny, but we didn't care about mpg, 'cause gas was 25 cents a gallon.
 
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Old 12-04-11, 07:06 PM
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That car with the 3.0 V6 is rated at 17 city and 23mpg highway. Sounds to me pretty much in the new SUV range for MPG. I hope with that kind of fuel performance it at least gives a little punch when her right foot goes down on the go pedal. I am not sure if I would use a K&N air filter on it though, and wonder both if you are seeing any benefit from it at all, and if it will cause you issues going forward, but that is just my opinion.
 
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Old 12-05-11, 05:42 AM
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Have you weighed her foot lately (right one)?
IMO that is 90% of it. A light touch on the gas pedal and brake will always get better mpg than a heavy foot. My wife might be little but her foot is a lot heavier than mine
Depending on the vehicle, I get 3-7 mpg more than she does.
 
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Old 12-05-11, 07:16 AM
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Not necessarily the problem, but keep the tire pressures up.
 
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Old 12-05-11, 11:34 AM
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What kind of mileage is she getting?
 
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Old 12-06-11, 03:16 PM
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Originally Posted by equinox View Post
I am not sure if I would use a K&N air filter on it though, and wonder both if you are seeing any benefit from it at all, and if it will cause you issues going forward, but that is just my opinion.
Easy now. with a gentle right foot, K&N gives extra mile to a gallon or so.
Been using them on ALL of our cars ever since 2001, with mileage logs etc. I vouch for them.
 
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Old 12-06-11, 04:53 PM
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We've got a 2007 IS250 AWD and my wife gets 26-27 mpg driving about 30% city and 70% 55mph country roads with a stop sign every 8-10 miles with light to moderate hills. She's mostly a docile driver unless she's had a bad day at work.
 
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Old 12-06-11, 09:59 PM
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I think that the 2007 is Government rated much better with up to 24 mpg city and up to 32mpg highway. The Op's 2002 uses a different engine for one thing. Oil coated air filters do provide less air flow restriction when clean than paper products, but also less dirt filtering. Always a trade-off but for typical driving with air intake flow under 300 cfm I am not sure what 'magic' from an oil coated filter provides better fuel economy except perhaps for those that prior to using the oil coated variety forgot to change their paper ones often enough. While I am sure that ukrbyk will not agree on this filter point, we all agree that a light foot does make the most effective difference around mpg.
 
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Old 12-11-11, 06:33 AM
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One item you could check is the oxygen sensor. I had one go bad on a car of mine. Its highway mileage dropped from a consistent 31 to a consistent 25 over the same streach of highway that I frequent. As soon as I replaced the sensor, the mileage went back to 31.
 
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Old 12-11-11, 06:46 AM
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Another area not mentioned would be to make sure all brakes are lubed properly and releasing as they should. Doesn't take much drag at the brakes to suck up fuel.
 
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