RAM 2500 2021 Owner's Manual page 481

Bio-Diesel Fuel Properties — Low Ambient
Temperatures
Biodiesel fuel may gel or solidify at low ambient
temperatures, which may pose problems for
both storage and operation. Precautions can be
necessary at low ambient temperatures, such
as storing the fuel in a heated building or a
heated storage tank, or using cold temperature
additives.
Fuel In Oil Dilution — Must Adhere To
Required Oil Change Interval
Fuel dilution of lubricating oil has been
observed with the use of biodiesel fuel. Fuel in
oil must not exceed 5%. To ensure this limit is
met your oil change interval must be
maintained to the following schedule:
Ram PickUp 2500/3500 Only — 15,000 Miles
(24,000 km)*
(*unless otherwise notified with a oil service
message.)
TECHNICAL SPECIFICATIONS
CAUTION!
Under no circumstances should oil change

intervals exceed 15,000 miles (24 000 km)
if operation occurs with greater than 5%
biodiesel blends. Oil change intervals should
not exceed 6 months in either case. Failure
to comply with these Oil Change require-
ments for vehicles operating on biodiesel
blends up to B20 may result in premature
engine wear. Such wear is not covered by the
New Vehicle Limited Warranty.
B20 Biodiesel capable: The engine may

suffer severe damage if operated with
concentrations of Biodiesel higher than
20%.
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