Originally Posted By: Zaedock
Originally Posted By: PT1
After running both a Honda & Toyota 4cyl speced for 5w20 on 5w30 as an experiement...both turned sluggish and fuel economy declined 1-2 mpg...and were fine when switched back.
Well? Why not switch my April fools post to a serious one?
I ran 5W30 Synpower this past winter in my 5.4L F150 with no difference in performance or economy. The truck was much quieter though and seemed "smoother". My nephew ran 5W30 in his '08 Wranlger and my sister in law ran 5W30 in her '08 CRV (both spec'd for 5W20) with no change in economy. There was no difference in the Jeep, but the CRV was MUCH quieter.
So, what does this mean? Who knows.
I'm certain I'll run 5W20 in my truck again, as soon as my existing Q HP and Q TP stash permits.
I was actually thinking about trying 5W20 in my 2000-Wranlger based off road buggy to see what happens. I'd like to do a used oil analysis on 10W40 vs 5W20 in this engine under conditions that no normal vehicle would ever see (beyond "severe" use). Heck, I'll even take it up a notch and run SuperTech 5W20!
That would be a nice test, just be sure that the used oil analysis is done after at least 2 OCI's with the desired oil for the test.
Originally Posted By: PT1
After running both a Honda & Toyota 4cyl speced for 5w20 on 5w30 as an experiement...both turned sluggish and fuel economy declined 1-2 mpg...and were fine when switched back.
Well? Why not switch my April fools post to a serious one?
I ran 5W30 Synpower this past winter in my 5.4L F150 with no difference in performance or economy. The truck was much quieter though and seemed "smoother". My nephew ran 5W30 in his '08 Wranlger and my sister in law ran 5W30 in her '08 CRV (both spec'd for 5W20) with no change in economy. There was no difference in the Jeep, but the CRV was MUCH quieter.
So, what does this mean? Who knows.
I'm certain I'll run 5W20 in my truck again, as soon as my existing Q HP and Q TP stash permits.
I was actually thinking about trying 5W20 in my 2000-Wranlger based off road buggy to see what happens. I'd like to do a used oil analysis on 10W40 vs 5W20 in this engine under conditions that no normal vehicle would ever see (beyond "severe" use). Heck, I'll even take it up a notch and run SuperTech 5W20!
That would be a nice test, just be sure that the used oil analysis is done after at least 2 OCI's with the desired oil for the test.
