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Some interesting info from the AMSOIL site:
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.
Based on this info, the ORM should allow us to run an extended drain interval.
_________________ Founder of L.O.S.T. 2006 CRD Sport Mods: GDE Hot Tune w/ 364#@2000rpm/Air Box /3" Str8 Exhaust/ASFIR Alum Skids/245-75R-16 Cooper STT PRO/OME LIFT w/Clevis & 4 Spring Isos/AirTabs/Rigid 10" S2 LED/4xGuard Ctr Matrix Bumper Drag Strip:Reac=.1078_60ft=2.224_1/8=10.39@64.8mph_1/4+16.46@80.8mph
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