OK!
When I say Lugging, I mean high load, low RPMs, at the highest possible load to avoid the engine shaking / struggling. I was using about full throttle between 600 and 1200rpm in 5th gear (!), then lifting off to 65% throttle between 1200 and 1500rpm, then going to 40% or so throttle between 1500rpm and 1800rpm, before EOCing and coasting for a long time. (I was lifting off the throttle to avoid fuel mixture enrichment).
I think it may have been because my engine was low compression that it let me do this 'lugging' (although importantly it wasn't 'shaking', it was quite smooth). It started shaking below 600rpm.
Using this technique together with EOCing, I got about 54mpg over a whole tank which was around 240% of EPA IIRC, so about 140% above EPA (the car was a low-compression 1.8 petrol turbo with no aerodynamics at all, and it weighed about 1300kg (2860 lbs). No other method got better economy - and I was EOCing for up to 66% of the whole journey
