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Hello everyone, my name is Ash Naidu. This is my first post & I need some help.
I have a 2011 Chevy Cruze 1.8L with 50k kms. Up until last year, I was getting great gas mileage. It dropped like a rock suddenly. I have changed spark plugs, timing belt & the upstream oxygen sensor but nothing seems to help. I do synthetic oil changes with 5w30 oil every 6 months. I am in the process of changing the downstream oxygen sensor as well. Is there anything I need to be checking?
 
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