Group believes average motorist could up fuel efficiency by 20%
'Honesty Barometer' data shows 80% of drivers made themselves known to victim
Event will take place on December 11, at Grosvenor House, Park Lane, London
Industry bodies blast 'desperately worrying' cuts, as some forces see 30-40% drop in officers since 2008
Guide to all the best action at this weekend's showpiece event
Motor Codes is a Trading Standards-approved garage scheme
Lee Stephens, 30, from Swansea, obtained £427-worth of fuel in August and September
Failure to top up oil levels can seriously damage vehicles