Just for comparison, here are the specs for both Amsoil DEO 5W-40 and the HDD Series 3000 5W-30. This is what's stated on their website. Keep in mind that I'm currently running the DEO on my engine and it's got about 2500 miles on this current batch of oil.
Amsoil DEO:
• API CJ-4, CI-4+, CH-4, CF
• API SM, SL, SJ...
• ACEA E7
• Mack EO-O Premium Plus
• DDC Power Guard 93K218
• Caterpillar ECF-3, ECF-1
• Cummins CES 20081
• Volvo VDS-4
• MB 228.3
• MTU Type II
Here's also the technical properties listed for that oil:
TYPICAL TECHNICAL PROPERTIES
AMSOIL Synthetic 5W-40 Premium Diesel Oil (DEO)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
15.3
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
92.6
Viscosity Index (ASTM D-2270)
176
CCS Viscosity @ -30°C, cP (ASTM D-5293)
5852
Flash Point °C (°F) (ASTM D-92)
226 (439)
Fire Point °C (°F) (ASTM D-92)
242 (468)
Pour Point °C (°F) (ASTM D-97)
-44 (-47)
Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss
8.9
Four-Ball Wear Test (ASTM D-4172: 40kgf, 150°C, 1800 rpm, 1 hr) Scar diameter, mm
0.44
Total Base Number
8.00
High Temperature/High Shear Viscosity, cP (ASTM D-4683)
4.2
Sulfated Ash Content, wt. %
0.97
And the same reccommendations for the HDD Series 3000 5W-30:
• API CI-4+, CF, CF-2, SL • ACEA A3/B3, E2, E3, E5 • Global DHD-1 • JASO DH-1 • Mack EO-N Premium Plus ’03 • DDC Power Guard 93K214 • Caterpillar ECF-1 • Cummins CES 20071, 20072, 20076, 20077, 20078 • Volvo VDS-2, VDS-3 • MB 228.1, 228.3, 229.1 • MAN 3275 • MTU Type 1 • MIL-PRF-2104G
And the technical properties for that same oil:
TYPICAL TECHNICAL PROPERTIES - Revised as of 7/06
AMSOIL Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
11.5
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
64.6
Viscosity Index (ASTM D-2270)
174
Cold Crank Simulator Apparent Viscosity @ -30°C, cP (ASTM D-5293)
5086
Pour Point °C (°F) (ASTM D-97)
-50 (-58)
Flash Point °C (°F) (ASTM D-92)
228 (442)
Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss
6.9
High Temperature/High Shear Viscosity, cP, 150°C, 1.0 x 106 s-1 (ASTM D-4683)
3.5
Four-Ball Wear Test (ASTM D-4172: 40kgf, 150°C, 1800 rpm, 1 hr) Scar diameter, mm
0.38
Total Base Number
12.2
Here is also what it says about extended drain intervals for each one:
DEO 5W-40:
SERVICE LIFE
AMSOIL Synthetic 5W-40 Premium Diesel Oil is recommended for use according to the longest service interval established by the engine, vehicle or equipment manufacturer. Drain intervals may be extended when monitored by oil analysis.
HDD Series 3000 5W-30:
SERVICE LIFE
AMSOIL Synthetic 5W-30 Heavy Duty Diesel Oil is recommended for extended drain intervals in unmodified(1), mechanically sound(2) vehicles or equipment as follows:
Personal Light Truck Diesel or
Gasoline Engine Service
• Normal Service(3) – Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
• Severe Service(4) – Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.
• Replace AMSOIL Ea™ full flow oil filter at the time of oil change up to 25,000 miles (other brands at standard OEM* intervals).
Commercial or Fleet Vehicles, Long-Haul Trucks, Marine Craft, RV, Off-Road Equipment
• Non-EGR equipped diesels – extend drain intervals up to two times (2X) the OEM* recommended drain interval or one year, whichever comes first, or longer based on oil analysis.
• EGR equipped or low emission diesels – extend drain intervals based on oil analysis or use the OEM* recommended interval.
• Replace Donaldson Endurance™ or AMSOIL Ea™ full flow oil filters at the time of oil change up to two times (2X) longer than the OEM* standard interval, not to exceed 60,000 miles in long-haul trucks.
*OEM = Original Equipment Manufacturer
(1) Modifications and Alterations – Engines operating under modified conditions are excluded from extended drain recommendations. Examples include the use of performance computer chips; non-OEM approved exhaust, fuel or air induction systems and the use of fuels other than those recommended for normal operation by the manufacturer.
(2) Mechanically sound engines are in good working condition and do not, for example, leak oil or consume excessive amounts, are not worn out, do not overheat, do not leak anti-freeze and have properly working emission control systems. AMSOIL recommends repairing malfunctioning engines prior to the installation of AMSOIL synthetic oils.
(3) Personal vehicles frequently traveling greater than 10 miles (16km) at a time and not operating under severe service.
(4) Gasoline Engine Severe Service defined as turbo/supercharged engines, commercial or fleet vehicles, excessive engine idling, first and subsequent use of AMSOIL engine oil in vehicles with over 100,000 miles, daily short trip driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty condition driving.
Diesel Engine Severe Service defined as extensive engine idling, daily short trip driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty condition driving.
Sorry for the long post. It looks like, based on what I've shown here, that I should probably plan on a 10k oil change on the DEO irregardless. I'm curious to hear any comments on this.