Fuel mileage mostly depends on how you drive. I get anywhere between 6-15km/L (E20 fuel) in a Colt Ralliart engine swapped Lancer (4G15 Mivec Turbo with standalone ECU). I also get anywhere between 4.5-12km/L in my Lantis Type R (built engine with Cams, pistons, ITB, standalone ECU, etc)
Other running costs also depend on how you drive / what kinda mods you have / what kinda parts you use. (my theory is that if have to buy parts, might as well upgrade)
වැඩේ තියෙන්නෙ it's always give and take. Ex.
- Stiff suspension = Higher drivetrain / chassis stress
- Bigger turbo/more power = Excess heat = Thicker radiator = more stress on the engine
- Bigger brakes = higher unsprung weight = higher stress on suspension components
- NVH not great (for a regular person)
Daily drive කරන්න පුළුවන්. (ලන්කාවෙ නීති එක්ක පොඩ්ඩක් sure නැහැ) හැබැයි compromises තේරුම්ගන්න වෙනව
PS. No offense. සල්ලි වියදම් කරන්න වෙනව. ඒනිසා අඩුම වියදමින් හැමදේම කරගන්න ඕන නම් - eco car එකකට යන්න (Dyno is not cheap, performance parts aren't cheap)