Re: Injectors/mileage (archive)

That's it, just the injectors. I added a performance chip about 6 weeks after doing the injectors. I didn't notice a measurable drop in mpg with the injectors alone. I think the DME feedback loop via the O2 sensor keeps the mixture in check. I'm getting about 1 or 2 mpg less in town now with the chip but I think mostly because I've been driving it harder & drive it more in 'S3' mode & visit the higher rpm's more frequently than before. Mileage is about the same as always on the highway, getting 14-16 in town & 22-24 hwy. The 91 & 92 have a 4.27 differential which is largely responsible for lower mpg. Also, we have mandatory oxygenated fuel where I live (Albuquerque) from Nov. 1 to Mar. 1 & what that means is they usually add 10% or more ethanol which lowers the BTU's per pound of fuel & corresponds to more loss in mpg. My memory is a little fuzzy but as I recall, gasoline has about 19,000 BTU's per pound & alcohol about 16,000. Do the math.

gale
92 735i
150k

You said you used 19lb/hr injectors what else did you change when you change the injectors, and did you get better mileage?

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Re: Injectors/mileage bossy 12:23 12/16/2001 (0)

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