I have looked for Luro-Moly Diesel Purge in the UK and it appears that Lubro Moly do not sell their products over here....shame!...are there alternative makes to Lubro Moly I could try?

Fuel consumption is correct, on my last trip I got 36.55mpg and trip before that 36.32mpg......figures were checked after a brimming the fuel tank after each fill.

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Current Mercs
R129 1994 300-24SL
W124 320E Turbo Technics Twin Turbo 350bhp

Previous Mercs
W124 1986 Quad Cam AMG Hammer, 45,000 miles
W124 300E Turbo Technics Twin Turbo 320bhp
W124 E500