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Old 06-14-2006, 01:40 PM   #1
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Oil Change /// Royal Purple????

qUICK QUESTION FOR ALL YOU GURU'S OUT THERE. I AM MOVING OUT OF STATE AND AM THINKING WHAT A GREAT TIME TO CHANGE THE OIL IN BOTH OF MY JEEPS. I HAVE A WRANGLER AND MY WIFE HAS A GRAND CHEROKEE BOTH 4.0'S. HOW MANY QUARTS SHOULD I PUT IN BOTH VEHICLES? ALSO I WORK ON A MILLITARY BASE AND THE ROYAL PURPLE IS 6.50 A QUART. IS THIS OIL REALLY WORTH THE MONEY? IT GETS ALOT OF HYPE AND I AM WONDERING IF ITS WORTH IT TO CHANGE MY OIL IN MY DRIVEWAY? DOES ANYONE HAVE EXPERINCE WITH THE GRAND? IS THIS A HARD TASK OR SHOULD I LET A PROFESSIONAL TACKLE IT? THANKS IN ADVANCE.... OH YA ONE MORE.....I WANT TO CHANGE THE TRANNY FLUID IN MY WRANGLER BUT I HEARD THIS IS NOT A GOOD IDEA FOR VARIOUS REASONS....IS THIS TRUE? WHAT ARE THE RULES FOR CHANGING TRANNY AND GEAR FLUID???? THANKS AGAIN

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Old 06-14-2006, 03:46 PM   #2
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not sure... but you may want to use lower case letters.. makes it s bit easier to read.

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Old 06-14-2006, 06:05 PM   #3
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I sure wouldn't spend extra to get RP oil. It's good oil but no better than any other good quality synthetic engine oil like Mobil-1.
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Old 06-14-2006, 06:40 PM   #4
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Yeah, its like your yelling or something. Not to mention annoying as hell to read.

Why is this thread listed twice?

Check your owners manuels for service intervals. Not sure about the auto tranny. Engine oil, every 3,000 miles. Differentials, every 15k, use synthetic at each end. Usually auto trannys need to be serviced every 30K, along with filter change. Usually done by a professional.
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Old 06-14-2006, 08:15 PM   #5
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I combined the duplicate threads. Much better to follow now.

Good advice from Jerry and bluvikng!
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Old 06-14-2006, 09:19 PM   #6
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Quote:
Originally Posted by amerijeep
I combined the duplicate threads. Much better to follow now.

Good advice from Jerry and bluvikng!
Thank you amerijeep!!!!!!!!
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Old 06-14-2006, 11:40 PM   #7
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I use the Royal Purple in my Jeep and soon in my wifes Grand. I really like it. I also use the "purple ice" in the radiator, and the gear oil. I have noticed a very slight increase in mpg, but it does run quieter and cooler, hence the increase in power. I think it is worth it. but thats my .02 cents.
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Old 06-15-2006, 02:09 PM   #8
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i've heard good things about royal purple but im not sure how much better it would be than mobil 1 or something like that
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Old 06-15-2006, 05:46 PM   #9
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Quote:
Originally Posted by hardy1531
I use the Royal Purple in my Jeep and soon in my wifes Grand. I really like it. I also use the "purple ice" in the radiator, and the gear oil. I have noticed a very slight increase in mpg, but it does run quieter and cooler, hence the increase in power. I think it is worth it. but thats my .02 cents.
Ditto on this one with the radiator fluid and the gear oil and tranny fluid. There I think RP is worth it. For engine Oil I go with Jerry and say just run a good brand of oil and change it regularly.
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Old 06-15-2006, 10:24 PM   #10
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I think i'm a little strange , i use Mobil one in the engine , Red Line in the trans / t-case , and Royal Purple in the diffs . I try to keep all the manufactures happy , lol.
p.s. you can buy mobil one at Costco.
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Old 06-15-2006, 11:55 PM   #11
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The best of the best.

Quote:
Originally Posted by 409biscayne
I think i'm a little strange , i use Mobil one in the engine , Red Line in the trans / t-case , and Royal Purple in the diffs . I try to keep all the manufactures happy , lol.
p.s. you can buy mobil one at Costco.

How can you consider your self strange when you have given each part of your drive train the best lubricant that is available?
I would consider that well read, and well done.
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Old 06-19-2006, 06:06 PM   #12
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I normally used Quaker State Q synthetic oil, but about a month ago I decided to go the extra mile (or few dollars) and get Royal Purple because Stacy David loves that stuff and he's the man. I can see why now. Royal Purple is awesome. I definitely noticed an increase in power.
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Old 06-19-2006, 06:14 PM   #13
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It does not take much to beat Quaker State, or Pennzoil. Both are at the bottom of the oil chain. Mechanics love people that run that crap though. They get to rebuild your engine........way before it is time.............keep using that stuff, and keep your local mechanics happy...........It gives them job security......
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Old 06-20-2006, 11:13 AM   #14
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Quote:
Originally Posted by bluvikng
It does not take much to beat Quaker State, or Pennzoil. Both are at the bottom of the oil chain. Mechanics love people that run that crap though. They get to rebuild your engine........way before it is time.............keep using that stuff, and keep your local mechanics happy...........It gives them job security......
I don't agree. I believe as long as you keep your oil changed when it should be, then there is nothing wrong with those oils.

Stacy David is paid very well to say he loves Royal Purple. I don't believe you can get a noticeable increase in HP by running this engine oil.
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Old 06-20-2006, 05:32 PM   #15
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Well, I didn't believe that it would make a difference either, but the way my jeep is performing now proves that it does make a difference. It probably depends on your specific application, but in my case it made a difference.

Also, Stacy David is the f**king man. I think he is credible. After all, he convinced me to use Royal Purple, and it did make a difference.
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Old 06-20-2006, 05:53 PM   #16
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If you break down oil to its molecular level, the molecules are larger than most synthetics. The surface of any metal object under a microscope is very rough. As the synthetic oils have smaller molecules, they can fill in the micro imperfections of the metal more completely. Therefore, you get much better lubricating qualities, with less friction, than with standard oil. This reduction in friction does several things........better fuel mileage, less heat from the engine, better oil pressure, more horse power, and longer engine life. So all things considered, it is very plausible that DoubleUp686 has noticed an increase in his engines performance.
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Old 06-20-2006, 09:18 PM   #17
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Quote:
Originally Posted by bluvikng
If you break down oil to its molecular level, the molecules are larger than most synthetics. The surface of any metal object under a microscope is very rough. As the synthetic oils have smaller molecules, they can fill in the micro imperfections of the metal more completely. Therefore, you get much better lubricating qualities, with less friction, than with standard oil. This reduction in friction does several things........better fuel mileage, less heat from the engine, better oil pressure, more horse power, and longer engine life. So all things considered, it is very plausible that DoubleUp686 has noticed an increase in his engines performance.
I can't argue with logic like that. I'm convinced. Good post.
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Old 08-20-2014, 11:11 AM   #18
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I was talking to a friend who has been using Royal Purple - he said he goes a lot longer between changes (like a year) because the synthetic does not break down as fast. Is this true?
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Old 08-20-2014, 01:43 PM   #19
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I put Royal Purple oil in my wife's Mariner once only because it was on sale cheaper than the Motorcraft synthetic that Ford recommends. When I changed it at the recommended 7,500 miles the oil still looked good; a lot better than the oil usually looks when I change it. It's hard to tell really without testing it but I would say it would hold up longer than other oils.
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Old 08-20-2014, 03:31 PM   #20
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Don't get me wrong, RP is great oil; but it's expensive. Mobil-1 makes a quality synthetic that does just as good. Sure, you might squeeze some more life out of your oil which translates to a bit of savings since you can wait until about 10,000 miles before changing the RP oil. My opinion though is that I like the standard 7,500 mile change; I want to circulate good clean oil regardless and get any crud out as often as I can.

Letting the oil drain and replacing the filter gets any debris such a metal shavings and bits out of the engine--this ultimately increases your engine's life. Plus, us Jeepers love finding any excuse to crawl under our girl and tinker.
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Old 08-20-2014, 06:16 PM   #21
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I used the RP Syncromax in my NSG370, an 05 6spd and definitely noticed the difference immediately. I know this is engine oil talk, but it works like a charm in the tranny....meaning RP.
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Old 08-20-2014, 06:28 PM   #22
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Used RP in my Hot Shot trucks (tranny, t-case and axles). The tranny ran about 20 degree's cooler under load. Great stuff for tranny's, t-cases and axles. I think its a waste of money for your engine. Any sythetic or semi-synthetic will perform as well. The value isn't there especially if you change your oil at 5k or less intervals (my jeep is every 2k because of the dusty conditions it see's and a lot of idle time).
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Old 08-20-2014, 06:35 PM   #23
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Quote:
Originally Posted by bluvikng View Post
It does not take much to beat Quaker State, or Pennzoil. Both are at the bottom of the oil chain. Mechanics love people that run that crap though. They get to rebuild your engine........way before it is time.............keep using that stuff, and keep your local mechanics happy...........It gives them job security......
So that's why Hennessey Performance factory fills all their cars with Pennzoil...
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Old 08-20-2014, 07:56 PM   #24
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Good read, I agree it may not be worth the money for the engine. I do have a question I have an automatic trans and if I drop the pan on the tranny and refill with RP how would it react to the fluid it mixes with out of the torque converter?
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Old 08-20-2014, 08:09 PM   #25
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I would ONLY ONLY ONLY use a specifically front-labeled ATF+4 in your automatic transmission. I don't care if Royal Purple claims it can be used to replace ATF+4, I would only use the exact ATF+4 which will be in big letters on the front label... not hidden in the fine print as the RP ATF includes. Our automatics are fussy and it's critical they get the right stuff... not something that claims to be as good.

Like this...



Or



Not a generic "multi-ATF" like below which tries to be a lot like a lot of different types of ATFs but isn't really good at any of the special ATFs like ATF+4...


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