Valve Spring Recall Affecting Fuel Economy? - Page 4 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

gravitylover · 11-08-2019, 09:59 AM

^^My mpg drops at least 10% in the winter for a variety of reasons, biggest being the winter blend fuel next being winter tires. When the fuel changes in the fall it drops 6-8% almost immediately and that's before I swap the shoes for the season.

It's interesting that you're seeing a 4% drop in mpg with new tires and I see about the opposite, a 5% gain with new tires. I guess the calibration of the speedo/odo isn't consistent but it could also be different tire heights and we run different pressures.

Dadhawk · 11-08-2019, 11:07 AM

Quote:

Originally Posted by gravitylover

^^My mpg drops at least 10% in the winter for a variety of reasons, biggest being the winter blend fuel next being winter tires. When the fuel changes in the fall it drops 6-8% almost immediately and that's before I swap the shoes for the season. .

I run standard all-season tires on the OEM wheels. I definitely see a drop in winter. Here's a chart showing it by month. The black tick marks are where tires were changed.

gravitylover · 11-08-2019, 06:58 PM

Damn you get good mpg, must have a feather foot and never drive in the 'burbs.

11-08-2019, 09:59 AM	#43
gravitylover Senior Member Join Date: Nov 2014 Drives: 2013 BRZ Premium 6MT White Location: SE NY Posts: 1,503 Thanks: 1,218 Thanked 669 Times in 474 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	^^My mpg drops at least 10% in the winter for a variety of reasons, biggest being the winter blend fuel next being winter tires. When the fuel changes in the fall it drops 6-8% almost immediately and that's before I swap the shoes for the season. It's interesting that you're seeing a 4% drop in mpg with new tires and I see about the opposite, a 5% gain with new tires. I guess the calibration of the speedo/odo isn't consistent but it could also be different tire heights and we run different pressures. __________________

11-08-2019, 06:58 PM	#45
gravitylover Senior Member Join Date: Nov 2014 Drives: 2013 BRZ Premium 6MT White Location: SE NY Posts: 1,503 Thanks: 1,218 Thanked 669 Times in 474 Posts Mentioned: 7 Post(s) Tagged: 1 Thread(s)	Damn you get good mpg, must have a feather foot and never drive in the 'burbs. __________________

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