Fleet Maintenance - 28

Get the dirt on diesel contaminants
Renewable diesel
versus fossil fuel
diesel options
By Matt Leuck, renewable
diesel fuel technical
manager, Neste US

Advancements in diesel engine
technology have improved performance, increased miles per gallon,
and reduced emissions, but even the
most innovative engines can be held
back by conventional fossil diesel.
The latest engine designs have
evolved to meet more stringent
emissions regulations, such as
those in states like California, where
Governor Jerry Brown committed
the state to "remove as much carbon
dioxide from the atmosphere as it
emits" by 2045. Yet these modern
engines require a much higher level
of fuel cleanliness and care. It's now
more important than ever to prevent
and manage fuel contamination.
In the past, maximum diesel fuel
system pressures rarely exceeded
3,000 psi, but today's advanced
systems can be as high as 30,000
psi. These high pressures, and the
subsequent chance for increased
wear of the injector housing, can
cause fuel to enter the combustion
chamber before or after combustion. When this happens with
fossil fuel, it can create a buildup
of soot or dilution of the engine
oil, leading to reduced viscosity
and increased engine wear.

CONTAMINANTS CAN
CAUSE ENGINE ISSUES

Hard particulate matter and water -
accumulated during transportation
and storage - are the most significant contaminants in diesel fuel.
Water and sediment lead to rust,
corrosion, and filter blockage, as well
as wear on pumps and injectors.
Hard particulate matter, commonly referred to as "dirt," causes
problems with moving parts in
the fuel system. Dirt can lead to
problems with starting, poor engine
performance, idling issues, and
potentially complete engine failure.
Water can create a host of issues.
The acceptable water volume in
diesel should be well below 0.05
percent; any more, and the life
of the fuel injector could be cut
by half. But the injector isn't the
only piece of equipment at risk.

28 Fleet Maintenance | October 2019

» Hard particulate matter and
water - accumulated during
transportation and storage
- are the most significant
contaminants in diesel fuel.
» Neste

Microbial growth in fuel storage
tanks is the single biggest cause
of fuel problems and destroyed
fuel quality. It can plug filters,
change the pH of stored fuel, and
cause damaging tank corrosion.
Whenever there is water present in a storage tank, microbial
growth is sure to follow - quickly.
As an alternative, some fleets
may consider renewable diesel.
Microbes do not readily grow in
renewable diesel. This alternative
fuel contains no aromatics or impurities, decreasing the frequency of
injector maintenance and diesel
particulate filter (DPF) regenerations.

ADVANCEMENTS IN
ALTERNATIVE FUEL
TECHNOLOGIES

With a cetane number ranging from
75 to 85, renewable diesel combusts
more readily than fossil diesel, which
has a cetane number from 42 to 52.
The result: better throttle response,

» Neste produces its MY Renewable Diesel, a bio-based diesel fuel
created through a patented vegetable oil refining process.
Neste

quicker cold-starts, quieter operation, and less particulate matter
(PM) production. It also requires less
system maintenance, thereby lowering fuel spend for fleet managers.
Renewable diesel is a direct-replacement fuel that is compatible
with all diesel engines. In fact,
every molecule in renewable diesel
is found in fossil diesel, meaning
no change in engines or refueling
equipment is required to switch.

Yet renewable diesel has a lower
carbon footprint and better tailpipe
emissions than fossil diesel. For
fleets seeking a fast route to clean
and efficient operations, renewable
diesel has a lifecycle carbon footprint up to 80 percent lower than
fossil diesel. Plus, because it doesn't
contain impurities or attract water,
renewable diesel can be stored
for long periods of time without
any change to its properties.



Fleet Maintenance

Table of Contents for the Digital Edition of Fleet Maintenance

Uptime: Are all systems secure?
Cover Story: Connecting to the future
Vehicles: Engine trends impacting performance and fuel efficiency
In the Bay: Understanding tire pressure monitoring and management systems
Shop Operations: How fleets can benefit from RCM
Management: Are you a good global citizen?
Economic Outlook: WDTKAWDTKI?
Powertrain: What are fault code action plans, and how can they help improve the vehicle diagnostic process?
Braking & Collision Avoidance: How will electric vehicles impact commercial truck braking systems?
Fleet Parts & Components
Tools & Equipment
Classifieds
Guest Editorial: Differences servicing air disc brakes versus drum brakes
Fleet Maintenance - 1
Fleet Maintenance - 2
Fleet Maintenance - 3
Fleet Maintenance - 4
Fleet Maintenance - 5
Fleet Maintenance - 6
Fleet Maintenance - 7
Fleet Maintenance - Uptime: Are all systems secure?
Fleet Maintenance - 9
Fleet Maintenance - Cover Story: Connecting to the future
Fleet Maintenance - 11
Fleet Maintenance - 12
Fleet Maintenance - 13
Fleet Maintenance - 14
Fleet Maintenance - 15
Fleet Maintenance - 16
Fleet Maintenance - 17
Fleet Maintenance - 18
Fleet Maintenance - 19
Fleet Maintenance - Vehicles: Engine trends impacting performance and fuel efficiency
Fleet Maintenance - 21
Fleet Maintenance - 22
Fleet Maintenance - 23
Fleet Maintenance - 24
Fleet Maintenance - 25
Fleet Maintenance - 26
Fleet Maintenance - 27
Fleet Maintenance - 28
Fleet Maintenance - 29
Fleet Maintenance - 30
Fleet Maintenance - 31
Fleet Maintenance - 32
Fleet Maintenance - 33
Fleet Maintenance - In the Bay: Understanding tire pressure monitoring and management systems
Fleet Maintenance - 35
Fleet Maintenance - 36
Fleet Maintenance - 37
Fleet Maintenance - 38
Fleet Maintenance - 39
Fleet Maintenance - 40
Fleet Maintenance - 41
Fleet Maintenance - 42
Fleet Maintenance - 43
Fleet Maintenance - Shop Operations: How fleets can benefit from RCM
Fleet Maintenance - 45
Fleet Maintenance - 46
Fleet Maintenance - 47
Fleet Maintenance - 48
Fleet Maintenance - 49
Fleet Maintenance - Management: Are you a good global citizen?
Fleet Maintenance - Economic Outlook: WDTKAWDTKI?
Fleet Maintenance - Powertrain: What are fault code action plans, and how can they help improve the vehicle diagnostic process?
Fleet Maintenance - 53
Fleet Maintenance - Braking & Collision Avoidance: How will electric vehicles impact commercial truck braking systems?
Fleet Maintenance - 55
Fleet Maintenance - Fleet Parts & Components
Fleet Maintenance - 57
Fleet Maintenance - 58
Fleet Maintenance - 59
Fleet Maintenance - 60
Fleet Maintenance - 61
Fleet Maintenance - Tools & Equipment
Fleet Maintenance - 63
Fleet Maintenance - 64
Fleet Maintenance - 65
Fleet Maintenance - 66
Fleet Maintenance - 67
Fleet Maintenance - 68
Fleet Maintenance - 69
Fleet Maintenance - 70
Fleet Maintenance - 71
Fleet Maintenance - 72
Fleet Maintenance - Classifieds
Fleet Maintenance - Guest Editorial: Differences servicing air disc brakes versus drum brakes
Fleet Maintenance - 75
Fleet Maintenance - 76
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Fleet Maintenance - S1
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