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Even if it's a buck more a quart than regular RP, worth it.


Jack
 

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Not recommended if car is still under warranty ??? If it is "better" than the other oils... why is this an issue. A better oil isn't going to void a warranty.

If a dealer will not honor a warranty because I used this oil they are going to have to prove to me that the oil ruined my engine and thus RP has some explaining to do at that point.
 

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RP, like Amsoil, only has one API certified oil. That is fine for your warranty. Anything not API certified exposes you to potential issues should something go wrong. Got that straight from a Chrysler Service Mgr who is very mod friendly.
 

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Priority="67" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 1 Accent 6"/> <w:LsdException Locked="false" Priority="68" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 2 Accent 6"/> <w:LsdException Locked="false" Priority="69" SemiHidden="false" UnhideWhenUsed="false" Name="Medium Grid 3 Accent 6"/> <w:LsdException Locked="false" Priority="70" SemiHidden="false" UnhideWhenUsed="false" Name="Dark List Accent 6"/> <w:LsdException Locked="false" Priority="71" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Shading Accent 6"/> <w:LsdException Locked="false" Priority="72" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful List Accent 6"/> <w:LsdException Locked="false" Priority="73" SemiHidden="false" UnhideWhenUsed="false" Name="Colorful Grid Accent 6"/> <w:LsdException Locked="false" Priority="19" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis"/> <w:LsdException Locked="false" Priority="21" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis"/> <w:LsdException Locked="false" Priority="31" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference"/> <w:LsdException Locked="false" Priority="32" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Reference"/> <w:LsdException Locked="false" Priority="33" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Book Title"/> <w:LsdException Locked="false" Priority="37" Name="Bibliography"/> <w:LsdException Locked="false" Priority="39" QFormat="true" Name="TOC Heading"/> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Georgia","serif"; mso-ascii-font-family:Georgia; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Georgia; mso-hansi-theme-font:minor-latin;} </style> <![endif]--> Do not want to start an oil war here but be careful. This oil does not meet the specs called for by Chrysler and Royal Purple clearly states not to use it in vehicles under warranty. If the oil has high levels of Zinc (and it says it does) it would be a good to try in a flat tappet engine which your Challenger does not have.
If you look at the oil requirements of your Challenger found in the manual and then investigate what specs RP meets for the weight oil recommended then you might want to move on. Yes, RP is a good oil and yes many use it for a gazillion miles with no issue but, have they use it in a 3.5, 3.6, 5.7, 6.1, or 6.4? Probably not.
Also, high levels of Zinc/Phosphorus is, as noted, wonderful for flat tappet engines and many engines with roller valve trains but, in a modern engine higher levels of Zinc/Phosphorus can trip emission codes and clog the newer cat converters.
Oil is the most important thing you put in your car next to yourself and family. Put in your car an oil that meets or exceeds the specific specs (not just viscosity) of the people who designed and built the engine.
 

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I meant to say...no oil holy wars please, and those who use Amsoil & RP willl say otherwise, I am just relaying what I was told.:werd:
 

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I am being told over and over that this HPS formula does not benefit our engines because it uses hydraulic lifts. I've been trying to verify it without calling Dodge (for obvious reason) but I've found nothing to ease my mind......you see, I just put 7 quarts into my 2011 SRT8 6.4L and of less concern is that the tech I coresponded with by email with Royal Purple said the 10W-40 would be just fine if it isn't a winter driver.

After reading about the possibility of "clogging" and getting near certain my engine will NOT get extra protection with the HPS I am probably going to drain $75.00 in oil next week......I guess I can't blame Royal Purple but I do feel they advise outside thier otherwise stated recommendations too easy for a sale.

Amsoil is just a P.I.T.A. unless you pay for shipping but then it's extra costly over even Royal Purple. I love Royal Purple but I'd like to see them offer me a coupon but as I already said....I don't see them as obligated really.

Thinking about Redline now. They do use fully ester synthetics as base which is the highest quality. Amsoil doesn't even do that.


"Good Morning,

If you want a Royal Purple oil that is closest to the OE specification, then Royal Purple SAE 5W-40 (part # 01540, quart bottle) is going to be your choice. If you want the added protection and performance of a Royal Purple HPS oil, then Royal Purple HPS 10W-40 (part #31140, quart bottle) is what we recommend. Since you use your car primarily in the summer 10W-40 should not present any cold start issues for you. You can be confident that the HPS 10W-40 will be a fully functional significant performance upgrade oil. If warranty compliance is currently a more important consideration than a performance oil upgrade, then Royal Purple SAE 5W-40 would be the oil to choose. Thank you for choosing Royal Purple and have a great day!

Jim Morrissey
Technical ServicesRoyal Purple, Inc."


So I went and installed it a few days ago......BTW, should I have a flush done to clean out this oil before filling with 5W-40 approved?
 
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