Tuning for fuel efficiency

[Toms306]

Stop start constantly because of my job, slight smoke off boost grey in colour not black, boosting around 16psi.....

I got more mpg when I was on 11mm, I don't understand the shite mpg either apart from the constant stop start. It's something that annoys me daily I've tried advancing pump made no difference. My only thinking now is a more efficient turbo to bring power in lower down, just glad the fuel is only 25p per liter.

All that said I can't remember ever having a d turbo getting over 40mpg

With your driving surely a petrol would be better!!  Get something that already runs LPG at 55ppl as well...

Though at 25ppl your veg must be pretty poor...doubt that helps the mpg!