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Old 02-20-2013, 02:39 PM   #57
90503


 
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Drives: 2011 2SS/RS LS3
Join Date: Nov 2011
Location: Torrance
Posts: 14,402
Quote:
Originally Posted by steveo9043 View Post
I know back in the day, manual trans cars would get better mileage with the same motor. So maybe an Automatic LS3 would get 2-3 mpg less then a manual LS3 so the increase of 1 mpg over the ls3 manual may be 3-4mpg ls3 auto vs l99 auto... Make sense?

I agree with you that manuals have traditionally gotten better mileage than autos...and you are probably correct that the AFM enables the autos to keep close, or better...but 1mpg for highway mileage rating better with the automatic than the manual....seems like it should be much higher than that...


Now I understood the LT1 dod/afm on/off was turning on/off the ability for it to go into 4 cylinder mode.

example:
dod off (always V8)
dod on (just like L99 cars, the ability to go into 4 cylinder mode)
....Good info....then if AFM is also used on manuals, their mpg should be significantly greater than the automatics again, as you state above...

EDIT...screwed up the quote thing...lol...replied to the first part in your quote...sorry...lol
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