I've found out that courtesy nissan also selling Royal Purple Synthetic oil wich cost about $4.99/qt of 5w30.

Compare to any other oil, how superior is this oil and where else I can get them with more reasonable price?

Thank you

 

4.99/qt is a very good price. I paid ~7/qt here at the one local shop that carries it.

It's good stuff. Up there with Amsoil and Redline as one of the best oils you can get.

 

What is your oil change interval?
Thank you for the comment

 

Every oil has a different ability to go different drain intervals. Shing here has gone 7500 miles on Mobil 1 and gotten lab analysis of the old oil to confirm it's still okay. I've gone 7000 miles on Amsoil and had lab analysis that looks good, too.

If you want to "dial-in" your regular drain interval on Royal Purple, the only way to safely do so is to send in an oil sample for analysis after ~7000 miles. Blackstone Labs (www.blackstonelabs.com) does this for ~$25. They'll send you a free analysis kit, and when you send the sample in, they charge you the $25 or whatever. It takes ~1.5-2 weeks for your results to get back to you. Tell Blackstone specifically that you want to determine your drain interval and ask them if your oil sample indicates you can safely do so.

Although I recommend you do go through the effort of getting an analysis done, if you don't want to go through the effort, there should be no problem going 5000 miles on the Royal Purple (or Amsoil/Mobil 1/Redline).

Even if the analysis comes back and does look good, I wouldn't go more than 7500 miles because then your oil FILTER becomes an issue (clogging). 7500 miles is safe but 10,000 miles is definitely pushing it. You could always just change the filter and leave the oil, but I always figure that you might as well just change the oil as well at that point.

Sorry, probably more info than you wanted, just trying to make sure you have as much info as possible instead of just blindly extending drains.

 

Thank so much Keven97SE .. I really need this info.

I can wait for my next oil change and I will pour that juice to my Max. and I will try that blackstone labs. I will publish the result.

Thanks again.

Erwin