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Diesel Oil Drain Interval Recommendations Adjusted
AMSOIL has documented increasing levels of fuel contamination (fuel
dilution) in the engine oil of 2007-2008 light-duty Ford, GM and
Dodge diesel pickups, and indications are that 2009-2010 models are
also affected. Research indicates fuel dilution is intensifying due
to the use of in-cylinder post-fuel injection during the engine’s
exhaust stroke to regenerate the diesel particulate filter (DPF).
Fuel in the oil reduces the oil’s life expectancy and effectiveness.
Because diesel fuel is a natural solvent, fuel dilution in motor oil
causes a decrease in viscosity which may lead to an increase in
engine wear rates.
Although AMSOIL Premium Diesel Oils have shown the ability to
maintain integrity under fuel dilution conditions, the abnormally
high rate and unknown long-term effects have forced AMSOIL to adjust
its drain interval recommendations as a precautionary measure in
2007-2010 Dodge 6.7L, Ford 6.4L and GM 6.6L LMM light-duty
turbo-diesel pickups. In these applications, AMSOIL recommends
changing AMSOIL Premium API CJ-4 Synthetic Diesel Oils (DEO, DME) at
the manufacturer-recommended drain interval. Drain intervals may be
extended further with oil analysis.
AMSOIL previously announced a fuel dilution issue in 2007-2009
on-highway Caterpillar C13 and C15 engines that forced the company
to adjust its drain interval recommendation in those applications to
the manufacturer-recommended drain interval.
In all other applications, AMSOIL full synthetic diesel oils are
recommended for three times (3X) the OEM recommendation, not to
exceed 50,000 miles/600 hours or one year, whichever comes first,
while Synthetic Blend 15W-40 Heavy Duty Diesel and Gasoline Motor
Oil (PCO) is recommended for the longest OEM recommended drain
interval. Drain intervals may be extended further with oil analysis.
AMSOIL Diesel Oil Drain Intervals, revised November 2009
AME
AMSOIL Synthetic 15W-40 Heavy Duty Diesel and Marine Motor Oil (AME)
is recommended for extended drain
intervals in engines that are unmodified and in good operating
condition.
Diesel Engine Service
-
Three times (3X) OEM* recommendation, not to exceed 50,000
miles/600 hours or one year,
whichever comes first. Drain intervals may be extended further
with oil analysis.
Gasoline Engine Service
*Operating conditions and drain intervals for severe and normal
service are defined by the OEM. Refer to your
owner's manual.
Note:
Extended drain intervals are not recommended when using biofuels
containing >10% ethanol or 5%
biodiesel (B5). Follow OEM drain intervals or extend drain intervals
with oil analysis.
ACD
AMSOIL Synthetic 10W-30/SAE 30 Heavy Duty
Diesel Oil (ACD) is recommended for extended drain intervals in
engines that are unmodified and in good operating condition.
Diesel Engine Service
-
Three times (3X) OEM* recommendation, not
to exceed 50,000 miles/600 hours or one year, whichever comes
first. Drain intervals may be extended further with oil
analysis.
Gasoline Engine Service
*Operating conditions and drain intervals for
severe and normal service are defined by the OEM. Refer to your
owner's manual.
Note: Extended drain intervals are not
recommended when using biofuels containing >10% ethanol or 5%
biodiesel (B5). Follow OEM drain intervals or extend drain intervals
with oil analysis.
HDD
AMSOIL Synthetic 5W-30 Heavy Duty Diesel Oil
(HDD) is recommended for extended drain intervals in engines that
are unmodified and in good operating condition.
Diesel Engine Service
-
Three times (3X) OEM* recommendation, not
to exceed 50,000 miles/600 hours or one year, whichever comes
first. Drain intervals may be extended further with oil
analysis.
Gasoline Engine Service
-
Normal Service — Up to 25,000 miles or one
year, whichever comes first, or longer based on oil analysis.
-
Severe Service — Up to 15,000 miles or one
year, whichever comes first, or longer based on oil analysis.
*Operating conditions and drain intervals for
severe and normal service are defined by the OEM. Refer to your
owner's manual.
Note: Extended drain intervals are not
recommended when using biofuels containing >10% ethanol or 5%
biodiesel (B5). Follow OEM drain intervals or extend drain intervals
with oil analysis.
DEO
AMSOIL Premium API CJ-4 Synthetic 5W-40 Diesel
Oil (DEO) is recommended for extended drain intervals in engines
that are unmodified and in good operating condition:
Diesel Engine Service
-
Three times (3X) OEM* recommendation, not
to exceed 50,000 miles/600 hours or one year, whichever comes
first. Drain intervals may be extended further with oil
analysis.
-
2007-2009 Caterpillar C13, C15 on-highway
engines must follow OEM drain interval.
-
2007-2010 Dodge 6.7L, Ford 6.4L, GM 6.6L
LMM light duty diesel pickups must follow OEM drain interval.
Drain intervals can be extended further with oil analysis.
Gasoline Engine Service
*Operating conditions and drain intervals for
normal and severe service are defined by the OEM. Refer to your
owner's manual.
Note: Extended drain intervals are not
recommended when using biofuels containing >10% ethanol or 5%
biodiesel (B5). Follow OEM drain intervals or extend drain intervals
with oil analysis.
DME
AMSOIL Premium API CJ-4 Synthetic 15W-40 Diesel
Oil (DME) is recommended for extended drain intervals in engines
that are unmodified and in good operating condition.
Diesel Engine Service
-
Three times (3X) OEM* recommendation, not
to exceed 50,000 miles/600 hours or one year, whichever comes
first. Drain intervals may be extended further with oil
analysis.
-
2007-2009 Caterpillar C13, C15 on-highway
engines must follow OEM drain interval.
-
2007-2010 Dodge 6.7L, Ford 6.4L, GM 6.6L
LMM light duty diesel pickups must follow OEM drain interval.
Drain intervals can be extended further with oil analysis.
Gasoline Engine Service
*Operating conditions and drain intervals for
normal and severe service are defined by the OEM. Refer to your
owner's manual.
Note: Extended drain intervals are not recommended when
using biofuels containing >10% ethanol or 5% biodiesel (B5). Follow
OEM drain intervals or extend drain intervals with oil analysis |
