Search results

  1. O

    F350 or Ram

    It’s a fuel economy/emissions trade off. Moving the SCR closer to the engine makes the SCR reach operating temperature faster on the chassis emission certification tests. The chassis emission certification tests are very low load, so they don’t have very high exhaust temps and the SCR needs...
  2. O

    F350 or Ram

    When I say passive regen, I’m not talking about thermal O2 passive regen. I’m referring to NOx (NO2) regen, which is more meaningful than passive thermal. NO2 is able to oxidize the soot out at a much lower temperature than the typical regen. It occurs as low as 200C but is more prominent at...
  3. O

    F350 or Ram

    There isnt a physical level sensor. DEF level is monitored exclusively by an ultrasonic level sensor since it can freeze during the winter.
  4. O

    F350 or Ram

    The 2025 Rams loose basically all passive regen because they moved the SCR in front of the DPF. So the regen distance will decrease and they will most likely have more DPF problems with the DPF behind the SCR vs in front of it.
  5. O

    F350 or Ram

    The gas engines :LOL: But I don't think brand has much to do with DEF issues. Its most likely just gonna be luck of the draw since there aren't too many suppliers for the DEF components.
  6. O

    F350 or Ram

    The Ram powertrain is basically all new for 2025. New version of the Cummins, new transmissions, new exhaust systems both gas and diesel. Gas engine is carryover for the most part I believe. Chassis and cab is carryover, the cab interior has just been updated. The Ford will be mostly unchanged...
  7. O

    ‘17 6.7L PSD 135k mi; HPL 5w40 CC 5.4k mi

    I would have expected stationary regens to increase fuel dilution because you have to inject more fuel to get the required temperature increase across the DOC for regen since the engine isn't under a load.
  8. O

    ‘17 6.7L PSD 135k mi; HPL 5w40 CC 5.4k mi

    Are you only doing stationary regens? Stationary regens will definitely cause more fuel to get in the oil and also should be avoided if possible.
  9. O

    ‘17 6.7L PSD 135k mi; HPL 5w40 CC 5.4k mi

    Every 400 miles isn't super often and seems about right. How long is the regeneration process taking? 6.9% fuel seems like a lot for what appears to be a normal regeneration distance.
  10. O

    ‘17 6.7L PSD 135k mi; HPL 5w40 CC 5.4k mi

    Do you know how often your truck regens?
  11. O

    U.S. Diesel & Gasoline Weekly Fuel Cost Update 03-03-2025

    Just to touch on some of the demand side contribution to gas prices. Vehicle miles traveled in 2024 only just surpassed 2019 but gasoline demand is still lower than 2019s numbers. So it appears, vehicle efficiency gains and electric vehicles have started to decouple gasoline demand from vehicle...
  12. O

    U.S. Diesel & Gasoline Weekly Fuel Cost Update 03-03-2025

    My understanding is that they will affect the Midwest and northeast the most. The Midwest get most of their oil from Canada and the northeast has direct connect with Canada for refined products like diesel and gasoline. The south and west will most likely avoid the tariff impact. But this is all...
  13. O

    U.S. Diesel & Gasoline Weekly Fuel Cost Update 03-03-2025

    Kinda surprising that prices are going down heading into driving season right now… Lots of stuff is happening in the oil between tariffs and OPEC production cuts ending.
  14. O

    13 Vw Passat tdi P050e

    Sounds like you have a bad Temp sensor. The downstream temp sensor of the DPF is used to control the regeneration process of the DPF. With it reading 91C, I doubt it would let you start the regeneration process.
  15. O

    Temperature on New car

    I think what @Jetronic is referring to is that some OEMs estimate the engine oil temperature. They don't have an actual oil temp sensor. Mazda does both, when looking at Mazda's PID list, they have a estimated oil temperature and an actual oil temp from the oil temp sensor. So, you just have to...
  16. O

    Temperature on New car

    Based on that, I would guess it would have the traditional thermostat. My CX-50 has a traditional thermostat too but not the same as the newer CX-30s. I know my CX-50 doesn't run particular hot either, it will fluctuate between ~170-180 in cooler weather. Without a check engine light and the...
  17. O

    Temperature on New car

    What year is your CX-30? On newer CX-30s, I think its MY2023+, with the updated 2.5L Mazda changed back to a traditional thermostat. They were using a coolant control valve previously for a few years. That control valve would fail and cause the engine to not heat up.
  18. O

    Changes To Emission Rules (video news)

    I think standards that control large externalities, like pollution, need to decreasing every year. But reading about this change, there is no new proposal yet for the fuel economy standards. Basically it seems like they are just saying they are too high and need to decrease. So, it doesn't seem...
  19. O

    2008 Volvo XC90 3.2L Mobil Euro FS 5w-40 w/8,470 Miles

    Do you know what the baseline oxidation for this oil is? I was looking through the VOA database and didn't see this oil listed.
  20. O

    2008 Volvo XC90 3.2L Mobil Euro FS 5w-40 w/8,470 Miles

    The report looks excellent. Thanks for sharing. Do you plan on extending the OCI out to 10k miles or stick to the 8ish? It looks like it definitely could go to 10k based on this report.
Back
Top Bottom