Diesel Cold Flow Improver (ACF)
Package sizes include:
16-oz. Bottles (case of 12)
AMSOIL Cold Flow Improver (ACF) has been reformulated to
provide maximum cold flow capabilities in diesel fuels. The
new formulation provides superior performance over the former
DFF formulation, which is available while supplies last.
Cold Weather and Diesel Fuel
As the temperature drops, the wax naturally found in diesel
fuel begins to form crystals. The point at which wax crystals
form is known as the cloud point. These wax crystals eventually
clog the fuel filter and starve the engine of fuel or prevent
it from starting. While low-quality fuels may form wax crystals
in temperatures as warm as 40°F (4°C), most fuels have a
cloud point near 32°F (0°C).
#1 Diesel Fuel
One traditional solution to cold-weather problems in diesel
engines is the use of #1 diesel fuel, which is diesel fuel diluted
with kerosene. While #1 diesel fuel has an advantage in low temperature
operability, there are also several disadvantages.
The energy content of #1 diesel fuel is about 95 percent of #2
diesel fuel, resulting in reduced fuel economy and less horsepower.
In addition, the kerosene used in #1 diesel fuel provides
less lubrication for the fuel pump and fuel distributor, increasing
the likelihood for wear on these critical components.
Cold Weather Performance Parameters
There are several areas of diesel fuel improvement touted by
various cold flow additive manufacturers, including pour point,
cloud point and cold filter plugging point (CFPP). Many claims
can be misleading, so it is important to understand this terminology
in order to determine which products truly provide
It is important to distinguish between CFPP and pour point.
Many competitive products make great claims regarding pour
point, leading consumers to believe their products are superior
when they actually have an inferior CFPP. Once fuel surpasses
its cloud point, the wax crystals begin to clog the fuel
filter. The CFPP temperature is a more important characteristic
than pour point because the engine will not run if fuel cannot
pass through the fuel filter.
AMSOIL Cold Flow Improver
AMSOIL Cold Flow Improver provides superior fuel flow to
help prevent filter plugging
in cold temperatures. It is
formulated for a broad
range of diesel fuels,
including #1 diesel fuel, #2
diesel fuel, biodiesel and
hard-to-treat ULSD fuels.
AMSOIL Cold Flow
Improver minimizes the
need for blending standard
#2 diesel fuel with lower quality
#1 diesel fuel, helping
maintain fuel economy
and keep engines functioning
normally. It is also
excellent for use with home
heating oil and kerosene heat systems.
AMSOIL Cold Flow Improver uses a jet-fuel-type deicer that
disperses water to control ice formation throughout the fuel
system. It inhibits wax crystal formation and can improve diesel
pour point by as much as 58°F (32°C), allowing fuel to flow to
the engine more easily and improving diesel engine reliability
in cold temperatures. In addition, AMSOIL Cold Flow Improver
lowers the CFPP by as much as 34°F (18°C) in ULSD.
Concentrated ACF vs. ACF Blended with Fuel
The new formulation of AMSOIL Cold Flow Improver will show
no signs of solidifying in its concentrated state in the bottle until
the temperature reaches -22°F (-30°C), a great improvement
over the previous formulation, which solidified in the bottle at
0°F (-18°C). Cold Flow Improver will only freeze in its concentrated
state, and AMSOIL recommends storing it at temperatures
above 0°F (-18°C). If ACF is allowed to freeze in the bottle
it can be thawed and used. When mixed with diesel fuel,
ACF effectively improves diesel fuel cold temperature properties.
It is recommended, however, that fuel be treated at temperatures
above 32° F (0°C). ACF will not dissolve wax crystals
which have already formed in the fuel.
AMSOIL Cold Flow Improver is specifically formulated for
improving fuel flow, helping maintain fuel integrity and preventing
the clogging of filters and injectors. It is excellent for use
with diesel fuels, heating oils and kerosene. Two oz. of
AMSOIL Cold Flow Improver treats five gallons of fuel, or one
16 oz. bottle for 40 gallons. The clear bottles feature an easy-to-read graduation label for accurate dispensing, helping
ensure proper treat ratios.