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Guest Message by DevFuse

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high mileage gas mileage....??

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31 replies to this topic

#26 nipper


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Posted 03 June 2007 - 11:27 PM

Before i replaced my 2.5L in Blu at 181,000 miles i got 19/27. With the same car a new engine i get 21/27.


#27 2.5GL


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Posted 04 June 2007 - 01:41 AM

What is a MIL?

Malfunction Indicator Lamp, otherwise known as a CEL, or Check Engine Light.


#28 kimokalihi


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Posted 04 June 2007 - 02:33 AM

are you sure your torque converter is locking up consistently?

No I have no idea. How would I find out?

#29 SVX_commuter


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Posted 04 June 2007 - 06:35 AM

Driving style is a big factor.
I found the temp sensor on my 93 Impreza was a factor even though the sensor didn't throw a code.
What about carbon build up on the intake valves? Maybe a throttle stomp with every tank full will blow some carbon out. Isn't this carbon build up a common problem?
I also recommend Lubrilon engine treatment. http://www.xcelplus.com/products.htm
I think it is good for older high mileage engines.
I have used it in 2 cars now with good improvement in mpg.

Take care,


#30 wondercow2


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Posted 04 June 2007 - 07:33 AM

No I have no idea. How would I find out?

On level ground on the highway, are the RPMS always "normal"? If they run higher or occasionally shoot up for no apparent reason on level ground, there's a problem. It's the auto version of a slipping clutch, sort of, though I don't think it's common at all.

#31 Robert M

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Posted 11 August 2010 - 01:57 AM

My 1987 GL Wagon runs great and gets about 26 miles a gallon average. Does a little better on the freeway, a little less in town. Mileage 216,000. No complaints.

#32 axgutt


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Posted 11 August 2010 - 02:38 PM

I drive a 95 Legacy wagon, 5MT, AWD, with 335,000 miles. After doing a Seafoam treatment about 5,000 miles ago, my average has been about 31 MPG. I mostly drive on the interstate, cruise control set at 65.

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