06 Silverado poor MPG
My 06 Chevy Silverado 5.3L is running great but my MPG has dropped from 16MPG to 10MPG. city. I have 94K miles never had a tuneup this gas MPG dropped suddenly anyone have a idea on what I should do?
Add some Lucas Fuel Injector Cleaner to gas tank. Noticed a big difference in my mileage when I used it.
and put a better air filter in it....AND check tall pipe back pressure!!
I have a K & N filter on it are they good and a Magnaflow muffler?
and the cat/cats
also you can buy another chip that will give you more timming .
but you said... suddenly ...could be a timming chain.
How about getting a tune-up since it has never been done?
That is what I will do a tune up thanks.
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