87 Octane Regular.
There is no Honda Fit Si...only a Sport model which has exactly the same engine as the base model and therefore requires the same fuel as the base. Minimum 87 octane...I'd probably say maximum 87 too. Go any higher and you're just showing off...but you drive a Fit...which is a pretty humble car. So then you just end up looking silly. Don't be silly :Þ
The 2007 Honda Fit runs on regular unleaded.
The 2008 Honda Fit runs on regular unleaded.
The 2013 Honda Fit runs on regular unleaded.
The 2011 Honda Fit runs on regular unleaded.
The 2010 Honda Fit runs on regular unleaded.
The 2009 Honda Fit runs on regular unleaded.
The 2012 Honda Fit runs on regular unleaded.
5w20
The 2013 Honda FIT-EV is a electric fuel-powered vehicle.
You don't. The fuel filter is located in the fuel tank and is a lifetime filter.
Anything will fit with enough time and money, but not easily, and more importantly, why???