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10w 30 v 5w; any difference?

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Old 06-22-2012, 11:19 AM   #1
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10w 30 v 5w; any difference?

Owner's manual calls for 5w 30 which I've used to change my oil - using synthetic. My boss bought some Mobil one 10w synthetic on sale and offered it to me. Is it alright to use the 10? I have 141k on my taco: 01' prerunner, ; cycl. 2.7
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Old 06-22-2012, 11:32 AM   #2
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Go for it.

Quote:
The viscosity grade (for example, 5W-30) tells you the oil's thickness, or viscosity. A thin oil has a lower number and flows more easily, while thick oils have a higher number and are more resistant to flow. Water has a very low viscosity -- it is thin and flows easily. Honey has a very high viscosity -- it is thick and gooey.

At cold temperatures, the polymers are coiled up and allow the oil to flow as their low numbers indicate. As the oil warms up, the polymers begin to unwind into long chains that prevent the oil from thinning as much as it normally would. The result is that at 100 degrees C, the oil has thinned only as much as the higher viscosity number indicates. Another way of looking at multi-vis oils is to think of a 20W-50 as a 20 weight oil that will not thin more than a 50 weight would when hot.
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Old 06-22-2012, 11:34 AM   #3
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Yep, go for it. You will be just fine.
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Old 06-22-2012, 03:01 PM   #4
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The 10w30 is just thicker oil at low temp compared to 5w30. I dont how cold it gets in San Francisco but 10w30 oil shouldnt be a problem
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Old 06-22-2012, 03:57 PM   #7
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Old 06-22-2012, 03:59 PM   #8
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The 01 owner's manual shows both, depending on anticipated temprature range, but with a ton of overlap. Dont' have it in front of me, but bascically, you'd only have to use 5 if you had regularly freezing, and only have to use 10 if you were regularly over 100 or desert.
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Old 04-21-2013, 10:30 AM   #9
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I Never run 10-w30 conventional because the oil industry uses this grade in particular to get rid of its low grade bases( I, II ) . Other conventional grades are usually (II & III's) but since your running synthetic it should be Almost all grade(IV)bases.
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Old 04-21-2013, 03:07 PM   #10
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Quote:
Originally Posted by Speed Freek View Post
No noticeable difference whatsoever.

I use ONLY Rotella synthetic T6 5-40 in mine, best oil out there, go to Bob the oil guys website and look it up!
Have you done uoa's to prove its the best? Even if you compair the same engines I can almost be certain all will have different wear numbers.
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Old 04-22-2013, 12:59 PM   #11
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Quote:
Originally Posted by ARB1977 View Post
Have you done uoa's to prove its the best? Even if you compair the same engines I can almost be certain all will have different wear numbers.
unless it makes a mpg difference that is worth it or you're keeping your engine 500K miles it's a waste of money. I've known people that used conventional, average cheap motor oil and tore their engines down after $200K miles and it looked great. I'm not advocating conventional oil, just making a point.
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