Fleet Maintenance - 16
Though new oil technologies help keep oil stable
longer and help hold oxidation at bay, oil still
needs to be filtered to remove any foreign particles
that could be harmful to the engine. Additionally,
all oil eventually degrades, and when it does it
can't disperse fine contaminants as well, leading
to agglomeration. This all needs to be filtered from
the oil to keep the engine running efficiently.
Oil filter technology has advanced alongside
engine and oil technologies, helping to improve
vehicle efficiency and prolong oil drain intervals.
Since CK-4 and FA-4 oils promise better oxidation
and shear stability and resistance to aeration, they
may even help improve filter life.
"In the past, bypass filters were more commonly used than full-flow filters due to their ability
to hold the higher amounts of sludge produced
during engine combustion," says Jay Stephenson,
North America training leader at Cummins
Filtration, a company that creates OEM and aftermarket filtration solutions for diesel engines.
"However, engine improvements in recent years
mean that today's trucks provide cleaner combustion and tremendous improvements in fuel economy. As a result, these engines also produce less
New engine designs, advanced oil technologies,
used oil analysis, and filtration technologies are
all working towards that goal. Advances made in
the last decade or so have seen oil drain intervals
increase to as many as 75,000 miles, compared to
around 10,000-mile intervals 30 years ago.
» While there is no official rule, the oil industry
typically agrees a synthetic blend needs to
include at least 30 percent synthetic oil.
Photo courtesy of Shell Lubricants
contamination in the oil than previous models."
Stephenson adds that today's engine oils
contain better contaminant control properties and
provide improved fuel economy, leading to less
contaminants present in the lubrication system.
In light of these advancements, full-flow filters
are now more commonly being used.
When it comes to selecting the right engine
oil filters, Stephenson says fleets should follow
the same rules that apply to oil. Following the
engine OEM's recommendations, specifying the
proper filter for the vehicle's
application, and using the
highest quality oil available
can all help a fleet get optimal
performance and life from the
oil filter. It's about finding a
balance between properly
removing contaminants, storing these contaminants, and
lowering oil flow restriction to
PC-Based Heavy Duty
improve fuel efficiency.
"When in doubt, talk to
your engine, lube, and filter
suppliers," he adds. "They can
help you make an informed
choice about which oil and
filter are best for your specific operation. A filter such as
the Fleetguard LF14000NN
with NanoNet media offers
the most effective filtration
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because of its ability to
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efficiency, contaminant holding capacity, and low-flow
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16 Fleet Maintenance | May 2019
When all is taken into account
- advanced oils, oil filters,
the technician's time, vehicle
downtime, used oil and filter
disposal - oil drains are no
small cost to a fleet. That's
why it's important to be able
to extend oil drain intervals
as much as safely possible.
The longer a vehicle can stay
on the road without stopping,
the better it is for the fleet.
Improvements in engine quality have allowed for
longer drain intervals by keeping the oil cleaner.
"Engines have gotten better," says PetroCanada's Humphrey. "Manufacturers are able to
hold tighter tolerances, fuel injection systems are
better, higher quality, higher pressures to atomize
the fuel to get better mixing between the air and
the fuel, primarily for lower emissions and better
fuel economy. But a nice side effect is you don't
contaminate the oil as fast so the oil can last longer
on newer modern engines."
Shell Lubricants' Arcy notes that for most
late-model vehicles, engine manufacturers have
laid out oil drain intervals based on different criteria, such as a minimum number of miles traveled
in the year or a specific fuel economy range. If fuel
consumption for a vehicle is higher, it will have a
shorter drain interval. If the fuel consumption is
lower, it will have a longer drain interval. A vehicle
will typically use more fuel when hauling a heavy
load and the engine is working harder, so the oil
needs to be drained more often. If the vehicle is
hauling a light load, the engine is working less and
there will be less fuel consumption.
The introduction and regular use of synthetic oils
over traditional mineral oils increased oil drain
intervals. Synthetics hold up better to extreme
temperatures and therefore last longer between
"[Synthetic oils] have pretty good properties
when it comes to low temperature and high-temperature performance, so in general, they tend
to be longer lasting fluids and higher performing
fluids," Humphrey says.
When CK-4 and FA-4 oils were introduced to the
market in December of 2016, they brought even
higher oil drain intervals with them. These oils
provide even greater high-temperature protection,
as well as the shear and oxidation stability and
aeration resistance discussed earlier.
"All the OEMs raised their oil drain intervals
by 10,000 or 15,000 miles pretty much across the
board with the new formulations that came out,"
ExxonMobil's Cigala says. "We're seeing opportunities for further optimization based on used
oil analysis because the new formulations are so
robust compared to CJ-4 formulations. Especially
from an oxidation standpoint."
Perhaps nothing is more important than used
oil analysis when it comes to extending oil drain
intervals. If a fleet plans to extend drain intervals
beyond the engine manufacturer's recommendation, used oil analyses are imperative in ensuring
the intervals are extended safely, without causing
damage to the engine.
"OEMs kind of set a conservative oil drain interval based on what they see in field testing and
performance across everyone's engine oils," Cigala
Table of Contents for the Digital Edition of Fleet Maintenance
Uptime - Are You Communicating with Employees Effectively?
Trends in Heavy Duty Diesel Engine Oils
Vehicles - Keys to Consistent Liftgate Performance
In the Bay - How Standardized Vehicle Communication Protocols Impact Diagnostics and Vehicle Operation
Shop Operations - Considerations for Mobile Device Usage in the Shop
Training - Where are all the Students Going?
Management - Why the Recent Airline Accidents Should be Concerning
Fleet Parts & Components
Tools & Equipment
Guest Editorial - How Much Do You Spend on DPF Maintenance?
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 You Communicating with Employees Effectively?
Fleet Maintenance - 9
Fleet Maintenance - Trends in Heavy Duty Diesel Engine Oils
Fleet Maintenance - 11
Fleet Maintenance - 12
Fleet Maintenance - 13
Fleet Maintenance - 14
Fleet Maintenance - 15
Fleet Maintenance - 16
Fleet Maintenance - 17
Fleet Maintenance - Vehicles - Keys to Consistent Liftgate Performance
Fleet Maintenance - 19
Fleet Maintenance - 20
Fleet Maintenance - 21
Fleet Maintenance - In the Bay - How Standardized Vehicle Communication Protocols Impact Diagnostics and Vehicle Operation
Fleet Maintenance - 23
Fleet Maintenance - 24
Fleet Maintenance - 25
Fleet Maintenance - 26
Fleet Maintenance - 27
Fleet Maintenance - Shop Operations - Considerations for Mobile Device Usage in the Shop
Fleet Maintenance - 29
Fleet Maintenance - 30
Fleet Maintenance - 31
Fleet Maintenance - 32
Fleet Maintenance - 33
Fleet Maintenance - Training - Where are all the Students Going?
Fleet Maintenance - 35
Fleet Maintenance - Management - Why the Recent Airline Accidents Should be Concerning
Fleet Maintenance - Fleet Parts & Components
Fleet Maintenance - 38
Fleet Maintenance - 39
Fleet Maintenance - 40
Fleet Maintenance - Tools & Equipment
Fleet Maintenance - 42
Fleet Maintenance - 43
Fleet Maintenance - 44
Fleet Maintenance - Classifieds
Fleet Maintenance - Guest Editorial - How Much Do You Spend on DPF Maintenance?
Fleet Maintenance - 47
Fleet Maintenance - 48