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Posted:  08 Feb 2008 05:40	[?]
Registered User Currently Offline Join Date: Feb 2008	Posts:  2 Reputation: Unranked [?] User Rank: Second Lieutenant
Just wondering the gas mileage of your xb12 after intake,exhaust,ecm upgrades.  Thanks Shaun

Posted:  08 Feb 2008 21:02	[?]
Registered User Currently Offline Join Date: Jan 2008	Posts:  15 Reputation: Unranked [?] User Rank: Second Lieutenant
A performance upgrade may enable you to accelerate and ride faster, which would necessarily use up more gas.  On the other hand, if you continue to ride gently and cruise at only moderate speeds like you did before the upgrade, your mileage may improve a little (despite the richer ECM settings), since your engine is working a little less to suck in air and blow out exhaust.  For example, if you're a commuter, you might find you can be lighter on the throttle, upshift a little sooner, and maybe run at lower revs on average during your day-to-day usage, which may result in better mpg. Caveat is I don't really know -- it'll be a couple of years before I can test this theory.  I considered upgrading, but decided to wait until the warranty expires (many reasons -- I can elaborate later if you want).  In any case, gas mileage did not figure at all into my decision, but that's just me.

Posted:  08 Feb 2008 21:41	[?]
Registered User Currently Offline Join Date: Jan 2008	Posts:  366 Reputation:  1 [?] User Rank: Lieutenant Colonel
No usually when you do mods like this your mpg gets worse.  But the power more than makes up for the 5mpg loss you got.

Posted:  08 Feb 2008 22:59	[?]
Moderator Currently Offline Join Date: Oct 2006	Posts:  1720 Reputation:  26 [?] User Rank: Four-Star General
I would usually get 38-42 mpg on my XB9R with a Race Kit

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