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Old 01-04-2008, 09:53 PM   #1
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Default 15 mpg...

Well after getting 15 mpg for two weeks (i thought the first week was a fluke or something) in a row I checked just one thing and then replaced it. Can you guess what it was? Don't scroll down if you want to.
I should have known
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Old 01-04-2008, 10:15 PM   #2
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it was bad? didn't you notice weird engine temps?
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Old 01-04-2008, 10:19 PM   #3
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odd, I have same rating (180) and I'm doing good on gas winter-wise.
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Old 01-04-2008, 10:23 PM   #4
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a 180* thermostat shouldn't cut your mileage in half....
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Old 01-04-2008, 10:34 PM   #5
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Quote:
Originally Posted by Bonnevillan
it was bad? didn't you notice weird engine temps?
Nope it wasn't bad and the temp sat at the 175 mark just like it always had when ever I looked at it since I've had the car; until I looked at it alot more often. Then I began to notice it would drop down (150) and climb back up only to drop way down again. I figure the themostat would open, let in the really cold coolant, close shut again, and repeat.

The new Stant stays right at 200 and boy do I have HEAT now.
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Old 01-04-2008, 10:38 PM   #6
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Quote:
Originally Posted by harofreak00
a 180* thermostat shouldn't cut your mileage in half....
That would be mixed city and highway. I took it for a long ride and am already at 21mpg even with most of what I had for miles came from the old T-stat.
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I just got gas so I'll see how this week goes before I start looking at other possibilities.
An O2 is definitely on the list.
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Old 01-04-2008, 10:41 PM   #7
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In the winter I notice 2-3MPG...no more than that..unless it is stuck open. then your miliage would really suffer.
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Old 01-05-2008, 02:23 AM   #8
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The Civic drops 6-8mpg in the winter
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Old 01-05-2008, 06:39 PM   #9
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What I *think* was happening was that i was dropping in and out of open loop and/or that the transmission wasn't able to completely warm up. I noticed my rpms are under 2k on the highway now @ 65
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