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What ever you do don't get 30 series tires. Worse thing if ever done. My average mpg went from 23/24 to 18-19. At 80 my engine is turning 2500 rpms.

---------- Post added at 08:34 PM ---------- Previous post was at 08:33 PM ----------

86custom said:
What ever you do don't get 30 series tires. Worse thing if ever done. My average mpg went from 23/24 to 18-19. At 80 my engine is turning 2500 rpms.
I can empty a tank in four hours.
 

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nosympathy said:
...stock 18" pirllies and 3.73 gears 80 sticks me at 2250 rpms and mpg is 19.4

So really yours sounds fine too me.
I had 275/40/19 I could keep my mpg around 22-23 mpg and thats not paw pawing it around. Best average I've seen was 26 mpg. I also have 3.73. This car loves the highway ?
 
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