Last week, I had the front shocks/struts replaced under warranty due to a noise in the steering wheel. As soon as I got the car back, my last two tanks of gas, my fuel efficiency dropped drastically. Since my car is equipped with a digital gas meter (Civic Si), over the past 3 years of ownership, it always drops a bar of gas around the same mileage (I reset the Trip Mileage every tank). The weather, my driving habit and tire pressure all remain the same before and after the warranty work. I am 100% sure of that.

What can I check or could've went wrong with the front shocks/struts replacement that can affect fuel efficiency??

Thanks so much for your help!

 

did you recheck your pressure? or just assume the dealer didn't make it 32.? they may have been anal and disconnected the battery when working on it...resetting the ecu.

 

Check the tire pressure.

Then take it back and insist they align it. Sounds like they didn't align it when they were done.

 

did they do an alignment?

 

when i installed coilovers and didnt do an alignment, my mpg went down by about 5. with my alignment is was back to normal.