I understand that, I have no problem with others correct me and say sorry mate but that won't work, maybe you could do this in stead. Not "what you've said is utter b.s".

Just open the map to it's own popup and look the values that does they make sense. If part of the map axis values or the map table values look strange, then try change the map address (klick mouse right button above the map popup to open a menu, then select the bottom selection to that menu). The map axis values may be at the beginning of the map (at the bin hex code) or they may be elsewhere.

Forgot to say, that to copy the definition, you have to select the map at the defined bin by mouse left button.

At this point when you have copied some definition to your project, the definition is in your project, just save it and look where winols saves it.

This is great news I'm yet to do more work on the code I have as I haven't done anything for a few days (work) but I'll get my code sorted so it's in a readable condition!

Yup, they don't get very aggressive with fuel cut on overrun, have to keep the cats hot.
Cutting back light load to near 15:1, and cut fuel completely on overrun will yield a significant MPG increase.

Obviously emissions will increase as well, mainly NOx if I recall.

Depends on the converter and it's optimum operating temperature, or no problem at all if they've been removed!

Or it could be they're injecting extra fuel to keep NOx production lower, so the cats don't have to work as much.
Minimal NOx production usually happens around 14.3:1, either way, the crappy MPG ratings are usually emissions related, to keep catalytic converters happy and NOx low (also CO and HC to an extent).

This is not a diesel with retarded soi for NoX. On Gasoline the only thing you can do is very slightly lean out the target AFR, but this has to be done as an ASM hack, which the OP will never get done. The fuel efficiency difference is max 1%, if that. I will also challenge you any time on that 14% claim. You are not going to make 14% more fuel efficiency by closing the EGR and bumping SOI in the "loft". Not even close. On 1-2 spots on the map maybe, but your car spends <1% of time in those spots.

I wonder where these myths come from?
Have you tuned an Audi A8 D3? You can not have, because none of what you say make sense.

Dumping fuel on overrun:
1. Increases consumption
2. Increases emissions
3. Will melt the cat if the cat is not specially designed for it.

Guess what - this car does not do this. Fuel is cut completely and resumed at RPM X. Very easy to see if you ever drove any of these cars with a wideband. But let me guess, you never have.

The only time some cars are slightly liberal with cutting fuel is to make exhaust noise on some newer "performance oriented" cars. The Renault Megane RS is a good example, then again it runs a metal cat for this very reason.
Leaning from 14.7 to 15.0 is 2% leaner. You will also make less power. The net gain in fuel efficiency is <1%. Never mind the fact that you have to do ASM hacks to get the ECU to request a leaner ratio than 1.0 and stay in closed loop. Not to mention that you will fail a sniffer emission test if you come in with a car that holds 1.02 lambda in closed loop - but this depends whether they do this test in your country.

Not worth it. Not even close. Calling <1% fuel differences "significant" - please...

x1000000

This is what I don't get.

If you want to save gas, don't hit the gas pedal as hard. Or restrict KFPED to 50% max. It really is that simple.