Coming home with a Buickload

[zeno]

Your Buick should get low-mid 20's mixed driving. My squaw
had a '99 LaSabre & got mid 20's. She bagged a dear so
only got abt 150K on it. Never needed "tune up" type stuff
but that engine was a leaker !
Assuming 18 gals that would give about 400 miles.
Either engine isnt running right or cat is plugged, O2
filthy etc. IF you need a cat price it at a custom exhaust shop.
One on my crown vic was rattling & got it changed for <$250.
Whatever u do be damn sure its running right when done
or you will wreck everything again.

73 Zeno
LFOD !