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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 05-22-2008, 07:18 AM   #1 (permalink)
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Increasing E30 gas mileage

I'm getting 20.2 around town; highway used to be 24.something but haven't done any road trips lately.

Plugs, filter, plug wires (performance set from BavAuto) are all less than 1 year old. Distributor cap is new.

There was a thread on using 19 lb injectors to increase mileage somewhere but I've also read that that tip is bunk.

Thoughts appreciated...
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Old 05-22-2008, 09:25 AM   #2 (permalink)
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That sounds like a 325i running normally. And yeah, the 19 lb injector idea is bunk. Watching the MPG gage can help a lot.
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Old 05-22-2008, 11:08 AM   #3 (permalink)
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Bav auto plug wires are garbage....maybe it was just my set, but I got rid of those after a week.
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Old 05-22-2008, 11:33 AM   #4 (permalink)
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yeah ditch the injectors, go back to a set of rebuilt and flowmatched stock injectors...

also try cleaning out the AFM for some MAF cleaner in case its sticking, that helps supposedly, i am yet to do this
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Old 05-22-2008, 12:14 PM   #5 (permalink)
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O2 sensor going out, a replacement might help.
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Old 05-25-2008, 09:18 AM   #6 (permalink)
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O2 sensor is 3 years old; should be working fine.

Well other than some induction mods looks like I'll close this potential project.
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