The additive will then enhance {HEAD ~ the operation} of {TAIL ~ diesel fuel combustion systems} by improving, for example, wear inhibition, lubricant oil life, and fuel economy 
of
The additive will then enhance { HEAD ~ the operation } of { TAIL ~ diesel fuel combustion systems } by improving , for example , wear inhibition , lubricant oil life , and fuel economy
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH