Is it valve adjustment time for higher MPGS?
Registered User
Joined: Sep 2003
Posts: 865
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From: Carolinas
In my 03,w/90k miles,I usually get 30 on the hwy....driving the SL +3 with the AC off.
AC knocks approx 4 off and driving the SL +10 is a mileage killer with any car.
We didn't buy these cars for the MPG rather for the SPG ( smiles per gallon).
\rlr
Carolina
AC knocks approx 4 off and driving the SL +10 is a mileage killer with any car.
We didn't buy these cars for the MPG rather for the SPG ( smiles per gallon).
\rlr
Carolina
Joined: Aug 2012
Posts: 7,972
Likes: 3,477
From: Foothills East of Sacramento
I have an 09 with 40K. Driving hard in the city:23mpg. Usual mix 25-26. Fast freeway:28. Last month drove over the Tioga pass in Yosemite and only drove 25-35 mph as the traffic and the view demanded. I was thinking I had a fuel gauge malfunction but when I filled up and did the math I got around 34-35mpg. Blew me away. The gauge was accurate.
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Joined: Jun 2012
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I did the valve adjustment last night. There were 1 big adjustment and a few minor ones
#1 - fine
#2 - exhaust 1 valve (minor)
#3 - both intake valves (minor)
#4 - 1 intake valve was loose which I thought was odd, I was able to fit a .11 gauge in with not much resistance.
After tightening everything up and putting the car back together I instantly noticed better throttle response. I didn't realize how sluggish the car was until after I drove it. Hopefully that will do something to the gas mileage. I'll post something up after my long drive this weekend.
#1 - fine
#2 - exhaust 1 valve (minor)
#3 - both intake valves (minor)
#4 - 1 intake valve was loose which I thought was odd, I was able to fit a .11 gauge in with not much resistance.
After tightening everything up and putting the car back together I instantly noticed better throttle response. I didn't realize how sluggish the car was until after I drove it. Hopefully that will do something to the gas mileage. I'll post something up after my long drive this weekend.
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Joined: Jun 2011
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I have an 06 AP2 with 62k. I was perusing the forums and noticed that some people get up 30mpgs on the highway I get closer to 22-26. With a few weekend road trips coming up I figured I could use the extra gas mileage if I could get it. Billman always say's to do a compression test before attempting to adjust the valves. I had some time after work and decided to do a compression test to see where I saw. I started with Cylinder #1 and got results of 195, 225, 240 - and was like WTF 
. This was a new gauge and the numbers seemed to be getting progressively higher so I chalked it up to the tester being new. I moved on to Cylinder #2 and figured I would come back to 1 last here are the results -
#2 - 240, 240, 240, 240
#3 - 240, 250, 260, 250
#4 - 255, 260, 255, 255
#1 - 240, 240, 240, 240
I was slightly concerned with #3 because of the 20 PSI swing but the compression is still really strong. So here are my questions -
Will the car benefit from a valve adjustment even though the number seem pretty strong?
Should I be worried about #3 because the numbers aren't super consistent?
Is there anything else I should consider when trying to improve gas mileage?
. This was a new gauge and the numbers seemed to be getting progressively higher so I chalked it up to the tester being new. I moved on to Cylinder #2 and figured I would come back to 1 last here are the results - #2 - 240, 240, 240, 240
#3 - 240, 250, 260, 250
#4 - 255, 260, 255, 255
#1 - 240, 240, 240, 240
I was slightly concerned with #3 because of the 20 PSI swing but the compression is still really strong. So here are my questions -
Will the car benefit from a valve adjustment even though the number seem pretty strong?
Should I be worried about #3 because the numbers aren't super consistent?
Is there anything else I should consider when trying to improve gas mileage?
Still a new car.
Thread Starter
Joined: Jun 2012
Posts: 870
Likes: 0
Originally Posted by Jeremy Clarkson' timestamp='1371562821' post='22615522
I have an 06 AP2 with 62k. I was perusing the forums and noticed that some people get up 30mpgs on the highway I get closer to 22-26. With a few weekend road trips coming up I figured I could use the extra gas mileage if I could get it. Billman always say's to do a compression test before attempting to adjust the valves. I had some time after work and decided to do a compression test to see where I saw. I started with Cylinder #1 and got results of 195, 225, 240 - and was like WTF . This was a new gauge and the numbers seemed to be getting progressively higher so I chalked it up to the tester being new. I moved on to Cylinder #2 and figured I would come back to 1 last here are the results -
#2 - 240, 240, 240, 240
#3 - 240, 250, 260, 250
#4 - 255, 260, 255, 255
#1 - 240, 240, 240, 240
I was slightly concerned with #3 because of the 20 PSI swing but the compression is still really strong. So here are my questions -
Will the car benefit from a valve adjustment even though the number seem pretty strong?
Should I be worried about #3 because the numbers aren't super consistent?
Is there anything else I should consider when trying to improve gas mileage?
. This was a new gauge and the numbers seemed to be getting progressively higher so I chalked it up to the tester being new. I moved on to Cylinder #2 and figured I would come back to 1 last here are the results - #2 - 240, 240, 240, 240
#3 - 240, 250, 260, 250
#4 - 255, 260, 255, 255
#1 - 240, 240, 240, 240
I was slightly concerned with #3 because of the 20 PSI swing but the compression is still really strong. So here are my questions -
Will the car benefit from a valve adjustment even though the number seem pretty strong?
Should I be worried about #3 because the numbers aren't super consistent?
Is there anything else I should consider when trying to improve gas mileage?
Still a new car.
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