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E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 03-26-2005, 11:24 PM
e30 e30 is offline
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Location: Dallas, Texas
 
Join Date: Mar 2005
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Mein Auto: 1991 Alpine White 318is
Question Question about unusual fuel consumption

Hey I have a 1991 318is w/ 183k, and I have always used 93 oct. Lately, I have noticed I average around 110 miles per tank. I have looked for leaks and havn't found any. I am a "spirited driver" but 110 miles per tank seems abit ridiculous. Any ideas on what could be causing this dip in gas mileage?

-THX!
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  #2  
Old 03-26-2005, 11:50 PM
Lanc3r Lanc3r is offline
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Mein Auto:
Quote:
Originally Posted by e30
Hey I have a 1991 318is w/ 183k, and I have always used 93 oct. Lately, I have noticed I average around 110 miles per tank. I have looked for leaks and havn't found any. I am a "spirited driver" but 110 miles per tank seems abit ridiculous. Any ideas on what could be causing this dip in gas mileage?

-THX!

When was the last time you changed your O2 sensor?

Tire pressure? Tires?

Brakes?

All of the above can affect MPG.
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Old 03-27-2005, 12:11 AM
e30 e30 is offline
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Location: Dallas, Texas
 
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Mein Auto: 1991 Alpine White 318is
Quote:
Originally Posted by misterlance
When was the last time you changed your O2 sensor?

Tire pressure? Tires?

Brakes?

All of the above can affect MPG.
I havn't changed the O2 since I bought the car in 2002, I have ruffly put 45k on it since then, how often do they need changed?
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Old 03-27-2005, 05:47 PM
e30 e30 is offline
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Location: Dallas, Texas
 
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Mein Auto: 1991 Alpine White 318is
update: ok driving today between my dads house and my house (which is 30 miles) I realised my odometer showed only 11! Thats 2/3 less than actual miles! I'm releaved to figure this out, because I was starting to think gremlins where siphoning gas from tank!
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Old 04-10-2005, 04:18 PM
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9x16 9x16 is offline
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Location: Calgary,Alberta
 
Join Date: Apr 2005
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Mein Auto: 89 BMW 325i (4 door)
I think o2 sensors need to be changed every 25K.Im not sure what bmw recommends.
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