Royal Purple

[MIG_45]

Has anyone ever tried royal purple on there M45 with oil filter has anyone seen any performance with it and if you have when do u change the oil and filter???

[sebvox]

I am running royal purple right now. There is no performance gain. The one thing I have noticed is that I now have oil leaks. I attribute that to the extremely small molecular structure of the synthetic base stock. The royal purple filter is really good though. Next oil change I am going back to a good high mileage synthetic blend. royal purple is probably more suited for a new engine and not for a high mileage one like mine.

[MIG_45]

really what oil would you recommend high mileage synthetic blend ill probably hold on to the oil filter

[Ilya]

really what oil would you recommend high mileage synthetic blend ill probably hold on to the oil filter

Stick to Castrol, Mobile 1, or Amsoil.

I personally went from Castrol to Amsoil on my Maxima. Then sold that car and started off with Amsoil immediately after getting my M and now have been running Mobil 1 for the last few changes.

[MIG_45]

thanks i will do that

[zerg711]

Check the 350z forums or do a search on Best engine oil for VQ35DE. A lot of the 350z guys did oil analysis and the general consensus is that Castrol Syntec (the one made in germany) produced the best results.

[mexillis]

I've been using rp for the last 5+ oil changes and have gone as high as 8k miles without changing it. I am using their filter to do so and my blackstone lab results have been good. I was using mobil one when I first got my M but noticed oil consumption within 3k miles about a qt loss.

[RM450GT]

I've been using rp for the last 5+ oil changes and have gone as high as 8k miles without changing it. I am using their filter to do so and my blackstone lab results have been good. I was using mobil one when I first got my M but noticed oil consumption within 3k miles about a qt loss.

Same here... I've noticed I'm not losing 1 qt between oil changes

[szh]

Hmmm ... which weight Royal Purple do you use? I assumoe 5W-30, but would like to confirm.

I have fed my car a steady diet of Mobile 1 Synthetic 0W-40 since about 10k miles and it has always used under 1/4 to 1/3 qt, sometimes 1/2 qt, by the middle of a change interval.

This last time, I tried Mobil 1 Synthetic 5W-30 and it went up to almost 2 qts in 3750 miles , so got me worried.

I don't know if the weight change is related, of course, but I went back to 0W-40 to see if it goes back to "normal".

But, if the RP really avoids any oil use between changes, then I will definitely give it a shot!

Z

[mexillis]

I use 5w30

[szh]

Thanks!

Z

[M35 Sport]

I have used RP a lot in the past. I am currently running penzoil platinum. My car seems to be burning more oil, but I am not sure. It burned RP also, but only about 1 quart between changes. I may go back to it but some times it is hard to justify the price difference. You may not notice any performance gain unless your car is hooked up to a dyno.