I know people " feel" like additives do something
I know clever advertising does
but I would just like to say any anecdotal evidence I have points in the other direction.
my anecdotal evidence being I worked for a large municipal fleet for 35 years that ran anywhere between 700 and 1000 diesel powered vehicle's on a daily basis
and they employer did not use any fuel additives, with the exception of a biocide one time when we had an issue with bacteria( aka Algae) in our fuel tanks ( we had 60,000 gallons of fuel at our facility) and we would then treat the fuel in the supply tanks, never on the vehicle itself.
only other anecdotal evidence I have would be the fact that engine manufacturers say to use diesel fuel and no proof is offered that additive do anything unless a specific problem is identified as being traced to the fuel and to use a specific chemical agent to treat that specific problem, not a generic across the board "fuel treatment".
That said I do occasionally use a fuel treatment like Howes or Power Service because I also succumb to marketing and it makes me feel better about the world.
