[320touring]

I've recently become a custodian of a 1996 Mk3 Golf fitted with the 1.9 TD aaz engine and 5 speed manual gearbox.

The engine has 75 bhp/110 ft/lb torque

has a bosch mechanical pump and a mechanical wastegate on the Turbo. No intercooler is fitted

I'm fairly clueless in the way of the devils fuel, and wondered if memebers here could help me enhance my knowledge regarding getting the best MPG from this engine?

Things I "think" I know:

The AAZ engine is Indirect injection (i.e. NOT a TDI)

Diesels are not throttled- unlike petrols

Cold Air Intakes are beneficial on Diesels- more complete burn of fuel

Keeping the engine as warm as possible (within operating limits!) also helps with ignition and complete burn.


Questions

I can find lots of info on altering max fuel on the pump and altering turbo boost pressures to improve performance- e.g. to circa 90-100bhp without intercooler.

Would these be beneficial from an eco-mod point of view? I.e. smaller throttle pedal opening for a given power/torque?

Anyone have any experience of running the AAZ lump on Veg oil/waste oil?
i.e organic rather than fossil?

Anyone got any specific AAZ or VW diesel Eco-mod tips?


I'm also looking at aero mods, as the car spends most of its time on the Motorway- any suggestions for grill block sizing?


Thanks for reading, and I'll be grateful of any help you may have!