Quote:
Originally Posted by ChazInMT
I just replaced my 2004 Civic EX manual transmission with an LX letting my 75mph RPM drop to 3050 from 3800. I drove from FL to OH but did not see great gains in efficiency. I will be driving to Arizona then back to Tennessee in the next 6 weeks so I should have a better idea. I did remove an upper grill block that I didn't replace when I changed the gearbox out, and didn't put it back in. I also did not drive as well as I could have. It does make highway speeds much quieter not going as far up in the RPM range, a nice bonus.
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Well, I'd say if you delted two things that are well-known to give you better FE (grill block and hypermiling) and still go the same FE as before the swap, then that suggests the swap might have saved you.
