I already have a thread with 5 or 6 UOAs using Delo XLE 10W-30 but I'm putting this one up for Delo SDE since nobody else has done so. Maybe someone will be interested... I don't know. The truck is a 2016 Freightliner Cascadia used mostly in OTR trucking. The two UOAs here are a mix of OTR and short haul driving. The previous OCI was ~ 58k miles with the last 11k being short haul. This new one is 45k miles with the first 25k being short haul and the last 20k being OTR. When running OTR, I pull for just a few companies, all of which require that I can haul near 50k lbs. That's all this truck has ever done, other than ~5% deadhead miles. Specifically, the short haul business was based in western PA and included western NY and eastern Ohio. Primarily on two lane roads and loaded to the 80k pound limit. My truck is set up for cruising the interstates at low RPM, so climbing the crazy steep hills put a whoopin' on my truck. If not crawling up a steep hill, it was crawling down (common sense and by law). Many places in PA and some in NY where you make a required stop to read the warning signs and then maintain the (truck) speed limit of 10-30 mph going down. Those same hills are tough climbing when going the other way, especially since most of the time you're coming out of a town; already moving slowly. Some general info for my particular engine: Set at 450 HP (available 1450-1625 rpm) 1650 lb-ft torque (available 975-1500 rpm) Makes 31 PSI max boost, 22 PSI at 975 rpm When going down hill at 1600-1700 rpm with the Jake Brake on, it makes about 29 PSI boost. Climbing hills at 1450-1600 uses 20-21 gallons per hour, at 975 rpm uses 13 gallons per hour. This OCI: 340910 miles on engine 45296 miles 1885 hours (889 driving / 996 idling) (idle speed when parked is 900 rpm) 7090 gallons of fuel burned = 6.3887 mpg No make-up oil, still full. Milton Cat was the lab for these two samples. I'm sorry to the BITOG crowd that I didn't ask for TBN/TAN this time. I wasn't concerned about it for myself but I know it would have been preferred here for entertainment purposes.
Odometer: 340910 295614 Oil miles: 45296 57964 Oil hours: 1885 1596 Oil brand: Delo SDE Delo XLE Grade: 15W-40 10W-30 API: CK-4/SN CK-4/SN Copper 10 12 Iron 29 43 Chromium 0 2 Aluminum 11 19 Lead 0 0 Tin 0 0 Silicon 8 6 Sodium 4 5 Potassium 14 29 Boron 42 18 Moly 115 2 Nickel 0 0 Silver 0 0 Titanium 0 0 Calcium 1547 1436 Magnesium 711 828 Zinc 897 848 Phosphorus 706 711 Barium 0 0 Soot 0.61% 0.58% Oxidation 31 25 Nitration 14 12 Sulfation 33 30 Water N N Antifreeze N N Fuel N N PFC 0.34 0.38 (percent fuel content) Visc @100C 14.5 12.4 TAN N/A 6.09 TBN N/A 1.9 PQI 7 6 (particle quantifying index)