Thinner oils are definitely better

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Originally Posted By: 440Magnum
Originally Posted By: Neil_A
Did you wake up high?


No, he woke up on April first.
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Maybe I woke up high forgot it was the first. Time to switch to Crisco motor oil.
 
Originally Posted By: Neil_A
Maybe I woke up high forgot it was the first. Time to switch to Crisco motor oil.

Crisco is only good in really hot weather. Otherwise Mazzola is much better.
 
How about Cod Liver Oil added to your favorite 5W-20 oil? That should cut a 5W-20, to a 2.5W-15, and offer a bio-friendly, green add pack.
 
My mother's 2006 Chrysler 300 with the 5.7 Hemi uses 5w20 and it is the only oil to use.The 5.7 Hemi has the MDS system using 5w20 only.Any other grade oil will gum up the acuators for the MDS which will not work right.
 
Originally Posted By: demarpaint
How about Cod Liver Oil added to your favorite 5W-20 oil? That should cut a 5W-20, to a 2.5W-15, and offer a bio-friendly, green add pack.


Also think of all the health benefits of using fish oil, like the Omega-3s. That should really keep your engine healthy :)
 
I'm a firm believer that I should run what the manufacturer calls for. That means I believe 0W-20/5W-20 are the best thing since sliced cheese in my Tundra, and 5w30 is the cat's meow in my wife's Altima.
 
...maybe for mileage, but under hard usage considering engine longevity, I hesitate on this topic. Thin oil gets squeezed out of the connecting rod bearings. I like to occasionally drive hard and don't want to have to think about it.
 
Also, Tide and Toilet Duck does wonders in the radiator...gets all those germs out the system for rapid cooling at high temps.
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Originally Posted By: 330indy
...maybe for mileage, but under hard usage considering engine longevity, I hesitate on this topic. Thin oil gets squeezed out of the connecting rod bearings. I like to occasionally drive hard and don't want to have to think about it.


Everyone keeps harping on the fact that the 20W oils are only supposed to be for mileage, and that they adversely affect engine longevity. Is the phenomenon you describe (engine oil squeezed out of connecting rod bearings) scientifically documented?

Consider this: Toyota is one of the companies advocating 20W oils in a lot of their engines. Toyota has also developed a world-wide reputation for reliability. Your claim basically says that Toyota is only interested in the tiny gain in mileage and is willing to take a huge black eye over engine failures down the road.

Sorry - that doesn't make any sense.
 
It's harder to squeeze a one micron molecule than a 100 micron molecule. Ask any supermodel-thinner is better.
 
Originally Posted By: JAG
Your sig. says you are an engineer and I wouldn't expect an engineer to jump to a broad conclusion like that based on your one vehicle.
why don't you add two to that number, because I switched to 5W20 from 5W30, and it quieted down some noisy lifters that i had
 
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that is exactly what I experienced in my dodge. Exactly
Originally Posted By: Badlees
I run 5w20 in my Tacoma 4.0L and I have to say that it's smoother than 5w30. I used 10w30 a few months back and didn't like the way the motor dragged. To me, 5w20 is working.
 
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?
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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?
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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.
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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!
 
Originally Posted By: Zaedock

So, what does this mean? Who knows.
21.gif

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!



This would be a most excellent experiment. Would realistically simulate random (but predictable) bumper-to-bumper traffic.
 
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