MPG Problems

[ozonehostile]

if its running too lean that can reduce your mpg aswel as performance. the engine is having to work harder to get the power if you know what i mean.

i noticed vastly improved economy when i tuned the pump on my 405 daily, it did destroy the clutch but for the month it was running fine mpg increased by about 10. same story on the 306, maxxed out pump and huge turbo but can still get to london and nearly back on £30