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Phase · 11-21-2023, 03:35 PM

So I switched my LRR with new winter tires and the fuel economy has tanked I. The city. To be expected. But the highway readings are giving weird numbers. Even if I draft behind semis and hyper mile at 55-60 mph, I can barely get above 60 mph. If I speed up to 75 on the interstate, I only drop to 48-51 mpg. A small drop

When I had the ecopias tires, I got close to 90 mpg at 55 mph! Now it’s down to 60. A 30 mpg hit from a simple tire swap is brutal and doesn’t make sense to me

At 75 mph I was getting 55 plus give it take mpg

So low speed high way driving I drop from 90 to 60 mpg and then at fast interstate driving I only drop a little over 5 mpg

Might as well just drive fast since the numbers hit is so small

Can anyone explain this?

11-21-2023, 03:35 PM	#1 (permalink)
Phase Master EcoModder Join Date: Mar 2022 Location: oregon Posts: 1,121 Black Bullet - '19 Hyundai Ioniq Hybrid Blue Thanks: 1 Thanked 592 Times in 470 Posts	Tire change. Am I crazy? So I switched my LRR with new winter tires and the fuel economy has tanked I. The city. To be expected. But the highway readings are giving weird numbers. Even if I draft behind semis and hyper mile at 55-60 mph, I can barely get above 60 mph. If I speed up to 75 on the interstate, I only drop to 48-51 mpg. A small drop When I had the ecopias tires, I got close to 90 mpg at 55 mph! Now it’s down to 60. A 30 mpg hit from a simple tire swap is brutal and doesn’t make sense to me At 75 mph I was getting 55 plus give it take mpg So low speed high way driving I drop from 90 to 60 mpg and then at fast interstate driving I only drop a little over 5 mpg Might as well just drive fast since the numbers hit is so small Can anyone explain this?