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rhis snake oil
Page 28
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-eally does work kLAN BUNTING is right to be ceptical about spurious claims nade for fuel consumptioneducing add-ons (CM 29 March). lowever, in the case of Daimler2hrysler's improved air managelent kit, the figures quoted are ased (m genuine controlled est results.
A customer-standard Axor ractor unit and triaxle trailer at 40 onnes GCW with 'conventional' iatcher air management kit was un for 350km at 90km/h. Its air it was then removed, and the chicle run for a further 350km. inally, the improved air kit was itted , and the vehicle run for two urther stints of 350km each. To mitigate the effects of veather changes on the results, a econd control vehicle with Jentical trailer at the same GCW vas run simultaneously, but vithout changes to its air nanagernent The overall result of this esting, with corrections for he atmospheric conditions Provided by the control vehicle, howed a 5.2% worsening of uel consumption by removal of he standard air kit, and a 6.6% Tiprovement over the standard quipment by means of the Tiproved kit.Added together, hese indicate well over a 10% laprovement over a totally Lnadorned tractor.
The results are borne out by nonitoring the test vehicle on its eturn to service with a large Listribution fleet, where it has eturned 11.65mpg compared vith 10.20mpg for a standard xor. in this case, it seems, the nake oil really works!
'Levin Upson :eni or product engineering pecialist laimlerChrysler UK