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Matt Herring · 08-10-2009, 06:55 PM

Depends what type of tire you deleted and what type of tire you added. If you removed LRR tires and added a HRR tire you will lower mpg. If it's the same tire you will have a breaking in period for the new tires that will lower mpg. Are all the tires the same size (just asking as they could throw off the odometer as well...hoping they are all the same size).

Also, any added weight in the car will lower FE. Your seats could be an extra 50, 75, 100+ lbs. that you are dragging around in the car now.

Both of these events (plus any bad for FE weather) can all have negative effects on your FE.

08-10-2009, 06:55 PM	#2 (permalink)
Matt Herring Master EcoModder Join Date: Jun 2008 Location: North Andover, MA Posts: 857 Bone's 2010 Prius - '10 Toyota Prius Black 90 day: 56.78 mpg (US) Thanks: 5 Thanked 23 Times in 19 Posts	Depends what type of tire you deleted and what type of tire you added. If you removed LRR tires and added a HRR tire you will lower mpg. If it's the same tire you will have a breaking in period for the new tires that will lower mpg. Are all the tires the same size (just asking as they could throw off the odometer as well...hoping they are all the same size). Also, any added weight in the car will lower FE. Your seats could be an extra 50, 75, 100+ lbs. that you are dragging around in the car now. Both of these events (plus any bad for FE weather) can all have negative effects on your FE. __________________ My Facebook: http://www.facebook.com/home.php?#/p...?id=1268001941 My Twitter: http://twitter.com/bone1124 Last edited by Matt Herring; 08-10-2009 at 07:00 PM..