|
Differences between AMSOIL
15W-40 Synthetic Heavy Duty Diesel and Marine Oil (AME) and
AMSOIL Series 3000 5W-30 Heavy
Duty Diesel Oil (HDD)
Both are excellent oils
in terms of wear protection and performance. The 15W-40 is designed and
engineered to provide 1,000,000 miles in over the road trucks before
engine overhaul. It provides exceptional wear protection, performance
and durability. The 5W-30 HDD is a fuel efficient diesel oil and is
considered to be one of AMSOIL's most advanced chemistry products. It
has a chemistry that no other oil has, anywhere. Either is an excellent
choice for your Ford Power Stroke, GM Duramax or Dodge Cummins
Turbo-diesel. The 15W-40 has a pour point of minus 44 deg. F and the
5W-30 has a pour point of minus 60 deg. F. The flash point is 446 deg.
F for both products. The Noack volatility of the 15W-40 is 6.6% and the
5W-30 HDD is 8.9%. The TBN (Total Base Number) of both products is 12
and both will provide exceptional acid neutralization of combustion
by-products. Both the 15W-40 and 5W-30 HDD are 25,000 mile/1-year change
interval lubricants.
The wear scar testing is performed at different loads, temperatures and
RPM's therefore you cannot compare the two test results. The decision
on which product to use can come down to personal choice. The 5W-30 does
cost more than the 15W-40 and I tend to recommend it for people that
spend more time on the highway than around town or short trips. It will
provide for increased fuel economy over the 15W-40. My experience shows
that the difference in fuel economy is generally in the 3-5% range over
the 15W-40, depending on the vehicle and other lubricants used in the
powertrain. The AMSOIL 15W-40 will provide a significant fuel economy
increase over petroleum 15W-40.
I recommend the AME to all my excavating, logging, construction and
other heavy diesel equipment accounts. I have used both the 15W-40 and
the HDD in my Power Strokes with excellent results and currently use the
HDD. AMSOIL Series 3000 5W-30 HDD is the most advanced chemistry
product AMSOIL offers. It has the beefiest additive package of all
AMSOIL motor oils and resists oil breakdown from heat, blow-by chemicals
and oxygen up to 10 times longer than conventional oils. It is also an
excellent severe duty fleet type oil for applications such as police and
delivery fleets, however that does not mean that the AME is not also an
excellent product but rather than the HDD is the "best of the best". I
also use the 5W-30 HDD in all my gas engine trucks, small engines,
generators, lawn equipment and snow-blowers. The bottom line is that the
choice is mainly a personal decision. Whichever product you choose will
be a wise decision and provide excellent protection and performance. If
you want one oil for ALL your gas and diesel vehicles and equipment the
HDD is the best choice. Note that when used in a gas engine car or light
truck for non-commercial use it is a 25,000 mile/1-year oil. In
commercial/severe duty use both the 15W-40 and 5W-30 HDD are 15,000
mile/1-year oils unless you are performing oil analysis and the results
indicate you can use it beyond 15,000 miles.
John Cardell
Lubrication Specialist - Truck/Automotive Engineer
Society of Automotive Engineers Professional Member
Joshua Tree Synthetics LLC
www.motoroilinfo.com
1-800-925-3059
Return to Diesel Oil Page Request a free
Amsoil Retail Catalog
|
Joshua Tree Synthetics
©Copyright 2008 |
|
