Royal Purple. Engine Damage In The Long Term?
 

This might be somewhere on the forum, but I can't seem to find it. But anyways. I've had my Z for about a year now, bought it last April. And ever since than, I've ALWAYS change my oil every 7-8K thousand miles with Royal Purple, with a KN oil filter. But I had a discussion with one of my friends today, and they swear up and down that in the long term, Royal Purple will ultimately mess up your internals. My two friends are driving a Civic Si(K20) and a TSX(K20).

So the question is? is this true. If so? do you guys recommend switching to Mobile 1. With A Mobile Filter

I always used RP on my cars. Never had any issues with it....

I've used RP for a long time and have never had any issues...

I been using Royal Purple on the 370Z for about 19k miles without any issues.

7-8K, really?

I was running RP for awhile and once went all the way to 6K and it turned to sludge.

I now just run M1 to about 5K and have had no problems, I as a general rule would never run to your intervals OP.

i would switch...there are enough, rumors, stories or whatever floating around that actually makes you think. Royal P has one of those 50/50 reputations...thats enough for me NOT to want to use it

I swtched also due to cost, M1 is pretty affordable if you buy the jugs from Walmart.

if you want to run longer in between oil changes I would suggest getting a synthetic filter. I switched to the RP filter and am giving that a try. I will cut it open at 5k and see what it looks like and make my determination from there with the oil evaluation. if it seems good I may try running it longer. I also use a larger filter, I can look up the number if you would like. In conjuction with the RP I always use Zmax as well. This all may be overkill especially with my 34 row oil cooler but it gives me a piece of mind. If I find that the RP is not doing what I like I will switch to something like redline or amsol.

Pennzoil Platinum is another REALLy good oil with great UOA's

Good to know, I will keep an eye out for it.

The real question is Why are they saying it would cause problems, do that have any information to back up those claims or are they just repeating some rumor they heard somewhere?

I wouldn't worry about it, I've heard claims royal purple was bad but have not been able to find anything to back that up. I have seen information to support the claims of it being a quality product and talked to a few people who agree it is superior, for various reasons.

over at BITOG thier UOA's are pretty lame compared to "cheaper" oils....ill see if i can dig up any info

I used to run Redline oil then switched to M1. Really happy with it. I can't remember if it was on the forum or not, but there was a test with all the leading oils. They tested for how much metal deposits and what types of metals were left in the oil after it was drained. M1 was one of the top.

http://www.performanceoilnews.com/oi...nst_oils.shtml

I commute 36 to college and the same back every m/w/f. It's my daily driver too, so yeah. I put alot of mileage on it. My last oil change was the start of this month and I already have 1.5K on it.

Thanks for the info though, I'm gonna switch to M1. What do you guys recommend changing it at? 5-6 maybe? and what kinda filter is best with M1?

I use M1 with a k&n filter. I'm sure there better filters out there but I'm happy with it.

I usually change every 5k.

What year, make, and model was that, that slugged?
7,500 is the limit for Synthetic oil, the OP is fine!

I use the M1 filter as well, Pep Boys had a killer deal combining both 5qts of M1 and thr filter for $30.

Walmart has the 5qt jug for $27

The RP was in my 2004 350z with about 70K miles at the time. I have run RP for about 40K miles and had no issues prior. I pushed the interval to 6K and the master tech who inspected my Z said it looked horrible.

Your friend doesn't know what the hell he's talking about....hope that helps! :D

I have used RP before in my turbo cars and its been perfectly fine! However in my 370Z, I use Motul 300V Power Racing 5w30!

ohh oil snob....nice...one of my favorite oils!

pfft. :rolleyes: I use Motul 301W Double Power Racing 6W31!

Might not be the oil your using... I recommend using oil 5k and no more. Sometime I would use the gold extended performance M1 and still change it at 5k or may be 6k but if regular M1 5k would be the limit.

What about Rotella T Synthetic? I used to run that in all my cars when I found out about it. The price is decent (Walmart) and its mainly designed to be cleaner for use in Diesel trucks. Lots of tq and boost out of those engines...

I have not used it in years, for no good reason though.

Rotella seems to be just about universally accepted as a high grade oil, my concern with using it in a car is how thick it is. Especially in the Z which for a special super thin oil.

That said I'm sure it wouldn't hurt anything, just stick with it if you make the change.

Rotella is good indeed... but I think I remember now why I stopped using it - because there are not too many viscosities available. I think the thinnest Rotella gets is 5w40 which is likely no good for our cold cars. Perhaps in Florida it would be fine.

:icon18:

I've always used Mobil1 and a there filters. I believe Mobil is the oldest oil company out there. But Nissan oil filters are great also. I use Motul when if was FI on my 350.

Mobil1 with Bosch filters is what I like to use....

You're friends own hondas so they don't know what they're talking about....

I kid I kid!

pureone purelator + 5w30 Pennzoil platinum for me

I don't kid, I don't kid

not trying to stir the :stirthepot: pot i use M1 and M1 filter....

i could be wrong but i think GM was one of the first manufactures to use m1
in the corvette motors. so good enough for me.

yes but ferarri use Pennzoil!! bwahahahaahha :stirthepot:

Pot has been sufficiently stirred.

I just would not run to 8K OP, 5k max

:owned:

:iagree: i change every 5k

Think so? You might want to read this: Don't use Nissan OEM oil filters

BTW, where are you getting your M1?

A great oil! Very tough, and meets just about every specification possible for auto manufacturers. I run it in my WRX. High specific output engines love this oil.

Negative. In oils, the "x" in xw-y, is the weight of the oil when cold. There is some variation in this category, but for the most part, a 5w-30 oil is as thick when cold as a 5w-40. If your talking about viscosity when hot, then yes, the 5w-40 will be a bit thicker than the 5w-30.

Ferrari uses Pennzoil Ultra European, there is a difference.

thought this might be of interest here:

Oil Tests