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AMSOIL API CJ-4 Diesel Oil
Outperforms In Field Study
 
The oils tested in this field study were
AMSOIL API CJ-4 5W-40 Synthetic Diesel Oil, Shell Rotella T6,
Mobil Delvac 1 ESP, Valvoline Premium Blue Extreme and Chevron Delo 400
LE
With the help of Duluth, Minn-based
refuse hauling company Nordic Waste, AMSOIL put its Premium API CJ-4
Synthetic 5W-40 Diesel Oil (DEO) and four competing API CJ-4 diesel oils
to the test. The objective was to prove the AMSOIL product's superior
performance in Total Base Number (TBN) retention and shear stability,
two characteristics that correlate to extended service life and enhanced
wear protection. Results show that AMSOIL Synthetic 5W-40 demonstrated
excellent TBN retention and was the only oil to remain within its
specified viscosity range throughout the test interval.
Field Study Parameters
The five oils were consecutively tested
in the same 2006 International 7400 rear-loading refuse hauler
practicing drain intervals of 300-plus hours. Oil samples for testing
were drawn every 50-75 hours. The vehicle was subjected to hauling up to
22,000 pounds of refuse up and down steep hills of Duluth 12 hours per
day. it encountered frequent stops and maintain extended red-line
operation during the process of unloading.
Placing further strain on each oil, the
truck's 7.6L Navistar DT466 engine employs a hydraulically actuated,
electronically controlled (HEUI) system that uses engine oil pressure to
operate the fuel injectors. HEUI systems can raise oil pressure to as
high as 3,500 psi, shearing less robust oils. Once sheared permanent
viscosity loss results, leading to increased volatility and oil
consumption, deposit formulation and increased engine wear.
Results - Shear Stability
Higher TBN levels well into service
indicate increased levels of the additives responsible for neutralizing
acids and dispersing soot. Oils that demonstrate higher TBN levels over
the longer periods are capable of providing increased protection
throughout extend drain intervals.
As Chart 1 shows, AMSOIL Synthetic 5W-40
was a top performing oil in the are of TBN retention. It is important
that the slope of TBN trend line be gradual and span the entire life of
the oil. While some oils experienced sharp declines, indicating poor
performance, AMSOIL Synthetic 5W-40 maintain high TBN levels throughout
the drain interval to provide effective engine protection.
Results - Shear Stability
AMSOIL Synthetic 5W-40 Diesel Oil
outperformed the competing oils in the area of shear stability (chart
2). Even after 371 hours in service, it was the only oil to remain
within the intended viscosity range, measuring 12.5 centistokes (cSt).
In contrast, all four of the competing oils sheared out of grade before
168 hours of operation, with the Chevron and Valvoline products shearing
out of grade prior to 100 hours. AMSOIL Synthetic 5W-40's increased
shear stability allows for superior wear protection and long-lasting
engines.
Balanced Formulation
As the test results show, today's
stricter emissions regulations and advanced engine technologies make
engineering a diesel oil that balances TBN retention with shear
stability a serious challenge. For example, while a Valvoline Premium
Blue Extreme demonstrated TBN retention on par with AMSOIL, its
viscosity after 93 hours was lower than the viscosity of AMSOIL 5W-40
after 371 hours. Similarly, Shell Rotella T6 maintained viscosity we but
was the poorest-performing oil in the area of TBN retention.
AMSOIL Premium API CJ-4 Synthetic 5W-40
Diesel Oil resists viscosity loss and provides superior TBN retention
throughout drain intervals up to three times original equipment
manufacturer recommendations, or longer based on oil analysis. It allows
operators to realize increased engine protection throughout extended
drain intervals for longer-lasting engines, reduced downtime and maximum
cost savings.
T's Advanced Synthetics
Greg and Marcy Thurman
Your Nationwide
AMSOIL
Authorized Independent
Dealer
Nationwide US Warehouses,
Canada and Palm Harbor, FL
727-798-8552
E-Mail:
greg@tsadvancedsynthetics.com
If you
experience problems or have questions or comments about
our website please email us at
greg@tsadvancedsynthetics.com
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