mine usually gains about 10mpg when i turn the engine on. On my old focus the trip computer used to go up dependin on how i was driving so i used to gain as i was goin along
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Poppy:
Tinted third brake light
DMB Badges
Mountune pas cooler
Painted Calippers
hose covers
MR200
Mountune billet arm
Front Strut Brace
35mm eibachs
Mountune big brake kit