Alan, the acetane improver do you have a brand name? My r-hand man here handed me a bootle of a fuel additive that is supposed to give @20% increased fuel economy and only adds 3% to the price per gallon. I want to research this as the economics play out very well for our trucks.
I also use slick 50 oil additive which I think saved my engine during a oil loss where I had to drive 8 mi. with intermittent oil pressure.
Thanks D

I use by "Diesel Kleen Cetane Boost" by Power Service.

From memory, Walmart claims slightly over a 1% gain in fuel economy from diesel fuel additives. If you have a fleet, trying to talk to one of their truck manahers. etc. would be a good idea.

Checking tire pressure alos helps, as well as synthetic lubricants (everything from wheel grease to differential fluid to transmission fluid is WELL worth it given small volumes and long life. Engine oil is questionable).

Also, just cleaning dirt off and waxing helps !

Best Hopes,

Alan