Yes, I am newbie ..but not a newbie car owner.
Just picked up the Focus 5 spd SE Hatch. I left behind a 02 VW TDI golf with 330,000 getting 45 mpg.
Mods .. with my VW I spent thousands tuning and making changes to a diesel that is very tunable.
With out reading tons of post and FAQ's in 5 minutes I have summed up the extent I will tune the Focus. Keep in mind I purchased the car for commuting 100 miles a day
K&N oily mess that can mess with the MAF, paper has proven to be better. IMO
Oil selection counts, I get free oil changes for the life of the car. I will be providing synthetic, so really not free.
The only planned upgrades to the Focus include ...
suspension, I need to research options ? any suggestions...
Tint windows ...
Full size spare, California roads eat tires and rims ..
its hard to chase power upgrades with out spending tons of money with little return IMHO.
Its going to be a hard pill to swallow going from 45 to 35 at best mpg but with diesel prices ... smog ... the price of a new TDI, I can live with a nicely equip Focus for years to come.