Royal Purple Synthetic Oil?

[INFINITI Q45]

Im going to do a oil change and have read the recomended oil (Mobil 1 synthetic) & I want to know if any one has run Royal Purple Synthetic in a Q45? I have used RPS in all of my other cars and it has allways has out performed other brands. If their is information about M1S performing above other brands, for the Q45, (besides company claims) please explain. I know the price is allmost the same, were I buy my oil.

[maxnix]

While I buy most of my M1 at Costco and (until recently) Sam's, I do use RP gear lube in my differential for its wide viscosity (75W-140).

If you keep your synthetic lubricants fresh, I don't think there is a significant difference among the top brands. Read the exhaustive oil thread by Fred aka palmerwmd.

[chinaonnitrous]

What kind of performance gains were you looking for?

I've used amsoil and RP, (easier and cheaper cost for me with amsoil). I do extednd the oil change interval a little longer. Blackstone labs tested some of my oil from my maxima and evolution, and showed at 3000 miles, the oil had good life left.

[nuQ]

i'm sure royal purple is great oil (i know fred has said they use a top base stock) but it is very hard for me to justify spending that much. i switch between M1 0w-40 and durablend 10w-40 (excellent detergent package), and ALWAYS use a high quality filter (M1). just not sure that two times the price of M1 is worth it. making sure the oil is clean (whether using dino, synthetic, or even extended drain periods) is vital,,,,IMHO.

[Rex]

Look for some posts by FalkDesigns, he's used a couple different (higher end/more expensive) synth's and may be able to offer his perspective.

[Jesda]

Royal Purple is junk.

zerothread?id=103543http://forums.nicoc ... d?id=48815

[maxnix]

Maybe not.

http://www.royalpurple.com/techrp/ncsu021112.pdf

They supply a lot of industrial lubricants and if the lubricants were not up to par or beyond, it would be discoverd quickly and you can be assured their business would disappear immediately.

[nuQ]

some of us here have gone to the trouble of getting their oil lab tested and determined that using oils like amsoil and royal purple can be used for extended drain periods, but most of us have not. the key is to be running clean oil (although good synths help at start-up which is important!). i was under the impression RP used the best base stock---guess there's still a question about that. for most of us,,,,4 changes a year with a good off the shelf oil and filter---can't go wrong.

[Falkdesigns]

Amsoil, at roughly 8k intervals, had it sent for analysis with 8k (last batch) and it came back with ALL numbers well within the acceptable range, only trace amounts of anything foreign in it. As far as I know, Amsoil, Redline and RP all use polyol ester base stocks, but I only have personal experience running Amsoil (my #1 choice) and Redline in my Q. I'm running Amsoil w/ their filter in the motor and Redline ATF.

[qship96]

for those wanting to learn more about oil and lubrication check out bobistheoilguy.com ,very good site with tons of info

[INFINITI Q45]

M1 and RP are both good brands. The cost is higher for RP and sounds like its not that much better, even though they claim horse power gains. I will buy M1, but now wich filter so many choices....

[nuQ]

http://minimopar.knizefamily.n....html

try this site for oil filters................................

[BadQ45t]

With all due respect to Jesda, RP is NOT junk. I have run it in my Z, X-terra, and Q45. I know a number of mechanics that swear by it. It is a high quality synthetic oil, however, I think that it is not worth the extra $$ over Mobile one, but junk, no way. Try it, it is very durable, I have it in my Q right now for 7 months and it is perfectly Purple still, completely clean (there is only 1800 on the crankcase).

It seems Amsoil is the best from tests, but i found RP and redline to be high quality and pretty similar in performance.

[Jesda]

Its overrated and not remotely justified by its outrageous price. Its like clothing... the more expensive it is, the nicer you -think- it is. By free market standards then, it is junk.

Stick with AMSOIL and M1.

[nuQ]

if fred was still a regular contributer here,,,,,he could probably give a complete, detailed breakdown of RP,,,,,but i'm with jesda to a degree. junk, no,,,,,,but worth the incredible price,,,NO. if it performs the same or similar to M1 at double the price is it worth it, no. does that mean M1 is junk cause it's similar to RP, no. is putting RP similar to putting junk in your engine, no. just foolish. if you want the best,,,,,M1 or Amsoil, IMHO.

i seem to remember a Ferrari a couple years ago,,,,wasn't a F40, but the newer super car,,,,drawing a blank. anyway,,,,,,,read in R&T or C&D how if you didn't use a special sunoco???? synthetic oil for all oil changes it voided the warrenty. the oil was incredibly priced,,,,,,,,like a few hundred dollars for an oil change. WHY?????? was it a deal worked out with ferrari and sunoco or did they really think that was the only synthetic oil worthy of a ferrari engine??????????????

[Phillybo180]

[QUOTE=Jesda]Royal Purple is junk.

I love how nobody ever elaborates as to why it is junk. And 'because' isnt a reason.

[konatown]

There has been a lot of speculation about RP but even on bobistheoilguy site, no one has any hard evidence that it is bad. Or good. RP also does not do all the certifications like Quaker does, so auto makers aren't going to recommend them.

Simple Sam will put RP in, notice that the vehicle runs smoother and maybe faster, then go to change it and see that the purple dye has been destroyed and the golden brown of oil changed too early is the only color.

[SynisterQ]

A couple of years ago on Horsepower TV, the guys ran a baseline dyno run with dino based fluids (petroleum based) and then did another run afterwards switching all fluids with Royal Purple. They made 8 rwhp with the RP fluids. Pretty impressive numbers from just fluid changes. I was at Walmart the other night and found out they sell a 5 quart jub of Valvoline Synpower for only $18+, thats a great price!!

[maxnix]

Yes that is. Just got 12 6 packs of M1 at Costco for $22/ six pack.

[Q45denver]

I think RP maybe superior since regular M1 (not the extended wear version) was recently reformulated and does not have the same level of anti-wear additives ( ZDDP) as before. The reason for the purple color I understand is due to a moly anti-wear additive.

[lino]

Yes that is. Just got 12 6 packs of M1 at Costco for $22/ six pack.

That's cheap! The cheapest price here for Mobil 1 is is $38.99 for a 4.4L jug that comes with a free 1L Bonus. Otherwise, you pay $8.99/ Liter, so a six pack costs $53.94 + tax (Just a bit over $60)

[Q45denver]

Someone has to pay for your universal health care. Paid $43 for 6 pack of 15-50W M1 extended wear less $10 off coupon at Autozone. I think regular M1 was $26.

[NightRiderQ45]

I think RP maybe superior since regular M1 (not the extended wear version) was recently reformulated and does not have the same level of anti-wear additives ( ZDDP) as before. The reason for the purple color I understand is due to a moly anti-wear additive.

God, I'm glad someone other than me knew the M1 5/10w-30 was lacking in this field. The extended wear version is soooo much better than the regular M1. There are multiple UOA at BITOG using M1 oil that proves that it is lacking additives. If I were to go to synthetic, I would use Pennzoil Platinum by far

[Victor]

Kragen has a special right now, 5 quarts of Mobil 1 and a mobil 1 oil filter for $19.99 using a mail in rebate. You can pick the more expensive extended life oil if you want for the same price, which I did. They claim 15,000 mile oil change interval for the extended life which has 50% more of the good stuff in it than regular mobil 1. They also have another special right now, a quart of slick 50 and 4 quarts of quaker state 10W-30 for ten dollars, which is about half the price just the slick 50 would cost, again with a mail in rebate. You can also get shell for 49 cents a quart with a rebate. Kragen definitely is the cheapest place to buy oil if you don't mind dealing with mail in rebates. Also got a deal on extended life Peak antifreeze, buy one gallon and get a gallon free. Kragen is how I managed to maintain my car for four years for only $150 total including repair parts.

[jimbyjimb]

Its overrated and not remotely justified by its outrageous price. Its like clothing... the more expensive it is, the nicer you -think- it is. By free market standards then, it is junk.

Stick with AMSOIL and M1.

Dude, c'mon, it's purple! That SO justifies 7 bucks a quart...

[Desmoquattro]

Any oil / engine product that claims performance gains should be viewed with the utmost suspicion. Never trust anecdotal evidence, or "racing" applications (racing has different criteria compared to street, and engine longevity beyond a race or two is not a concern).

Another thing to note - Amsoil is not API certified - why? well they claim it's because they don't want to spend the money on getting it tested and certified. Ok, so you void your own credibility to save a few bucks? Sounds fishy, though I'm not saying Amsoil is bad, it's one of the only true synthetics out there (M1 synthetic is a mineral base, for example). I just wonder why they don't spend the 300- odd thousand to get certified, aren't they making any profits? Do they think API certification is worthless?

[szh]

While I buy most of my M1 at Costco and (until recently) Sam's, I do use RP gear lube in my differential for its wide viscosity (75W-140).

Not trying to change your approach (because I agree that it probably does not matter for differential oil), but, as an FYI, Mobil 1 synthetic 75W-140 is also available. They have two formulations on the market ...

Z

[jimbyjimb]

I don't car what anyone says. RP is best based on the sheer fact that it is purple. Like Barney.

Seriously though, when I was 17 I put 6 quarts of RP in my 70 Chevy 350. I must've lost a quart a week. Haha, the ignorance, the stupidity...I miss it so! It does come back around at interesting times though...

[maxnix]

Not trying to change your approach (because I agree that it probably does not matter for differential oil), but, as an FYI, Mobil 1 synthetic 75W-140 is also available. They have two formulations on the market ...

Z

Yeah, I have that in one differential and Amsoil wide wieght in another. Forget what the Third one is running, but probabably the narrow weight M1.