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cfg83 · 10-03-2008, 07:49 PM

Hello -

Quick update. The wheel skirts appear to be helping my MPG. I have 7 tanks with the new skirts so far. I compared the same number of tanks before/after the skirts were added :

Dividing the After MPG by the Before MPG I get :

44.05 MPG / 42.17 MPG = 1.04458 => 4.45% MPG gain

However, I am not going to claim a 4.45% gain. There's just too many other possible factors. If I delete the two worst (sub 40 MPG) tanks of the 7 "before" tanks I get 43.46 MPG :

44.05 MPG / 43.46 MPG = 1.0136 => 1.36% MPG gain

Because of the above, I will only *claim* a 1.36% gain.

CarloSW2

10-03-2008, 07:49 PM	#15 (permalink)
cfg83 Pokémoderator Join Date: Dec 2007 Location: Southern California Posts: 5,864 1999 Saturn SW2 - '99 Saturn SW2 Wagon Team Saturn 90 day: 40.49 mpg (US) Thanks: 439 Thanked 532 Times in 358 Posts	Hello - Quick update. The wheel skirts appear to be helping my MPG. I have 7 tanks with the new skirts so far. I compared the same number of tanks before/after the skirts were added : Dividing the After MPG by the Before MPG I get : 44.05 MPG / 42.17 MPG = 1.04458 => 4.45% MPG gain However, I am not going to claim a 4.45% gain. There's just too many other possible factors. If I delete the two worst (sub 40 MPG) tanks of the 7 "before" tanks I get 43.46 MPG : 44.05 MPG / 43.46 MPG = 1.0136 => 1.36% MPG gain Because of the above, I will only claim a 1.36% gain. CarloSW2 Attached Thumbnails __________________ *What's your* EPA MPG? Go Here and find out!** American Solar Energy Society Last edited by cfg83; 01-27-2010 at 11:05 PM..