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Registered
Join Date: Sep 2009
Posts: 14
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318is change differential for better MPG
I have a 1991 318is 5speed with a 4.10 LSD and 205/60 14 tires. I only get about 25 mpg highway and would like to get closer to 30. I do a lot of highway driving/ commuting, and would like to boost this while still maintaining good acceleration.
205/60 14's are not readily available any more. So the next set will probably be 195/70 14. I have thought about changing the diff. to a 3.73 or lower for better MPG. What is the lowest I could go to get better MPG and still maintain some acceleration around town? Or should I just get taller tires? Thoughts and Ideas please. |
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10-01-2011, 08:57 PM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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Keep in mind that E30 odometers aren't exactly accurate. You may want to try verifying this with a GPS unit.
I'd just let off the gas a bit. You WILL miss the 4.10. You could even install a 2.93 out of a 325e, but you won't be happy with it. |
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10-02-2011, 10:13 AM
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