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At my next oil change going to try Royal Purple 5w30 which should be in a couple of weeks. Any thoughts?
 

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im running the purp right now. i believe im running a 10w30.
thicker oil is the way to go.
funny, I was always told the opposite.
thicker oil wraps around the rotating assembly adding to the rotating mass and will hang up in the upper engine instead of flowing thru the system.
 

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the hood of the truck advised me to.

the oil have bads on each side of the spectrum. you use to thin of oil, you will get metal on metal contact, more friction.
you use to thick of oils, lose power, hard starts, more friction.

now these arent the matter of from 5w to 10w. i just like the 10w.
 

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At my next oil change going to try Royal Purple 5w30 which should be in a couple of weeks. Any thoughts?
Me thnks your changing the oil too much! The service advisor told me the first oil change is not due til about 3500 miles. How many mile do you have on the 2010?
 

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thicker oil slings and collects more/as opposed to thinnerwitch flowes faster.
i suppose its a matter of opinion.
and opinions are like a$$ holes every one has one.
if it works run it ,this stuff gets way to technical for my little brain
 

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Discussion Starter #13
Thanks for the replys. My mileage will be in the 3to4k at about that time or close, at least in the next month. Wanted to see if the RP would quiet things down a bit.:)
 

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remember once you go purple you can't go back. I think it's mostly hype.
i agree, it's mostly hype, i use whatever is the cheapest at costco...

thicker oil slings and collects more/as opposed to thinnerwitch flowes faster.
i suppose its a matter of opinion.
and opinions are like a$$ holes every one has one.
if it works run it ,this stuff gets way to technical for my little brain
let me finish the quote.... "opinions are like a$$holes everyone has one and they stink!" haha
 

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i recently went from rp to amsoil, 4k miles rp was black, 4k miles on amsoil and well the amsoil is clean. rp is cheaper though.
 

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Discussion Starter #16
remember once you go purple you can't go back. I think it's mostly hype.
All hype I'm sure, but if it quiets down my my truck, I'll use it from now on. I'll let ya know.
 

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In a hot climate going to 40 weight is one thing but the W is for winter and a 10 is twice as viscous as a 5 and could lead to a problem in winter climates.
Nissan stated 5W-30 for a reason and if there is a failure and they have the oil sampled they definately would not warranty it. Why should they?
I'm not looking to butt heads with anyone but there are members on here who on their own decide they know better than the manufacturers engineers (not on this topic specifically) and end up in trouble because of it. Then they look to have it covered under warranty. When I modify an item, I am on my own and don't go looking to be saved.

Clint
 

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Discussion Starter #18
When they (Nissan) says 5W30 on a sticker under the hood thats good enough for me. Besides no risking the warrantry :)
 

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From what I know of oil, all oil has adhesion capability. That's just one of the many things it has to do to be effective. The viscosity numbers are just the resistance to flow from what I was taught. Yes, 5W30 is thinner (less resistance to flow) than 10W30. Bob is the oil guy has a lot of discussions on oil at his website.

http://www.bobistheoilguy.com/
 

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as an engineer for an OEM oil field tools company. you would be amazed at what people will do to equipment then claim the equipment failed due to a manufacturing defect. Oil is one of the sticky issues. We have tested a few varieties and have a brand and model of 140 wt gear oil. We have seen the field mix diesel into the oil to "help in cold weather", they have used transmission fluid, used motor oil, what ever they had at hand. We always take the same stance. If you think you know more about the equipment than us, then you can pay for repairs.

Nissan's engineers know more about that engine than we do, If they say I can run in the summer with 5W30, then why not run what they recommend? 5W30 synthetic Castrol has done me good for the last 150K. by Nissans recommendations, I could run SuperTech 5W30 changed every 3500 with the same effect.
 
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