Royal purple XPR 10w40 question

[sasha055]

Hi,

I'm almost due for my oil change and one of my friends friends... has Royal Purple XPR oil for sale, he'll give me 10qt for 100$ which is similar in price for regular PR or amsoil (I don't pay tax and shipping to this guy)

I have a couple of questions..
1. Is it good for my boxster? XPR is racing oil.. I don't race, my boxster is a daily driver to work and back

2. I'm worried about leaks.. car is 10 years old.. I have zero history of work done.. I'm worried that RMS could start leaking (I read that PR clean it out very well) I don't have 2k for RMS and clutch now I'd rather have sludge keeping it from leaking for time being

Should I get RP XPR? or should I just stick to M1 0w40 that is in the car now?

Thanks
Sasha

[JFP in PA]

While I recognize what I am about to say will start a debate: never the less, it needs to be said.

I would not use any product from this company. All of the various oils and gear oils we have looked at over the years (and we looked at a lot of their stuff) have been questionable at the minimum. Virgin oil analysis has demonstrated a significant lack of consistency in the unused products, indicating poor quality control in manufacture; UoA’s have demonstrated that their products shear down and fall out of grade way too quickly. Add in the fact that RP has regularly made claims and used questionable “legalese” concerning what ratings the products hold, and you have to begin to wonder what is going on. Probably the worst was when then claimed ACEA ratings, but got called out on it and eventually had to admit that they never submitted their products for ACEA mandated testing. Yet they continue to say their products are “recommended for ACEA applications”, whatever that is supposed to mean.

While we have not tested everything they make, the products we have looked at have not demonstrated the level of performance you would expect for the price they charge; and their ethics are questionable. You decide………

And I would not continue to use the Mobil 1 0W-40 either, but for different reasons that have already been beaten to death on this site as well as other oil oriented sites..............

[jmatta]

As JFP stated regarding the debate, oil issues have been beaten to death on this and other forums. I've used RP for years in my cars (mostly 911s), but for one reason or another, have switched to Castrol Syntec 10W40 for the last couple.

I will not use Mobil 1 or any other 0W40 product in my Box S...too thin.

You can usually find Castrol Syntec for under $5 on sale at AutoZone or comparable.

[eightsandaces]

I found the last ten quarts of Mobil 1 10 - 40 W high mileage formula, my car only has 30K but it was the best synthetic I could find in that range anywhere in the entire city. I figured the "high mileage" formula wouldn't hurt anything, hope that is right..

[JFP in PA]

Originally Posted by eightsandaces

I found the last ten quarts of Mobil 1 10 - 40 W high mileage formula, my car only has 30K but it was the best synthetic I could find in that range anywhere in the entire city. I figured the "high mileage" formula wouldn't hurt anything, hope that is right..

Mobil 1 10W-40 is a much better product than their 0W-40, but you can still a lot better yet for less money.................

[eightsandaces]

Originally Posted by JFP in PA

Mobil 1 10W-40 is a much better product than their 0W-40, but




you can still a lot better yet for less money.................

Maybe with free shipping, the selection here was so weak I did look online! So apparently, until later in Spring, I can't do any better for the money.