Search results for query: *

Forum search Google search

  1. mdh384

    Update: 5W-30 & Heavier Recommended RoTW

    I chose to deviate due to my own training and experience with oil viscosity temperature dependence, and picking engine oil viscosity using (potentially out of date) enginerding charts. Because automotive engines tend to run over a range of rpm and not at static load, the "right" viscosity is...
  2. mdh384

    Update: 5W-30 & Heavier Recommended RoTW

    You are right, OA is a far more powerful analytical tool, however filter inspections and OA serve to compliment eachother. Filter inspections are a good "right now" assessment of what is going on with the engine, and can serve as a nice "yup, everything is good" check. Seeing a bunch of...
  3. mdh384

    Update: 5W-30 & Heavier Recommended RoTW

    I brought another potential answer to the question posed, not necessarily my point of view. I am a person who is able to look at a situation objectively, and then make a decision based upon my use case. My operating temperature range goes from about 0F to 115F ambient... so there is no...
  4. mdh384

    Update: 5W-30 & Heavier Recommended RoTW

    Journal bearing clearances have not changed appreciably in decades. I would think the 5W30 requirement in the F Lexus has to do with higher heat generation of a higher horsepower motor not allowing for use of a 0W20 in "normal use" due to viscosity dropping as oil temperatures increase. The...
  5. mdh384

    Update: 5W-30 & Heavier Recommended RoTW

    I am not sure what is meant by 'high clearance parts'. Could you expand on that? Do we know if engine ECM tuning is identical across all markets? Do we know if ROW customers are instructed to start and drive as USDM customers are?
  6. mdh384

    Update: 5W-30 & Heavier Recommended RoTW

    I'll add some conjecture and potential lies to the (never ending) oil debate: In the past decade or so, OEMs have been trying to eek every last bit of emission control and fuel efficiency out of our (doomed) internal combustion engines. 0W-20 aids this in two regards: increased fuel economy due...
Back
Top Bottom