Hi

I have here a GQ 4.2 Diesel non turbo. Has a approx 350,000k's complete stocker engine wise which is in very good condition, owned since brand new never worked hard.

Its well overdue for injector cleaning or replacement and i've been tossing up whether to turbo it in relaxed mode! to achieve better fuel efficency and more torque. Less throttle climbing hills hopefully.

Regarding milage, without an accurate test, I'm averaging abount 450's on a tank around the street, or 550K's on the highway completely empty .. trying really hard to lean it out as much as possible on the throttle. really like to know what I should be expecting out of a tank with a good setup as I don't think she's running on song.

Weighing up the cost of a turbo age and mileage I'd be interested to know what the thoughts are turboing a good condition lazy 350,000K TD42 intercooled or not, and if other members have any experience with other options like extractors and 2.5" Exhausts with a good Fuel pump Injector tune to suit.

I've been reading articles with mixed opinions with people running extractors some say it has excellent advantages and others say turbo all the way.

I have no plans on getting rid of the vehicle at any time soon, quite frankly I can't see any other options that would replace what I have. A Brand new $80,000 in the Mud doesn't appeal to me so i am willing to sink some funds back into the beast.

Any ideas, tips, discussion or hints would be greatly appreciated. Any recommendations where to go to have the work done would also be appreciated.