Royal purple XPR 10w40 question

[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.

[JFP in PA]

Originally Posted by eightsandaces

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.

Go to your local Wal Mart, buy the 5 quart containers of Castrol Syntec 10W-40, a better oil and sells for about $23 per 5qt container, and no shipping............

[tonycarreon]

didn't use the XPR, but i did use RP.

can't say i found any reason to think it was worth the extra $$

[Gilles]

Originally Posted by JFP in PA

Go to your local Wal Mart, buy the 5 quart containers of Castrol Syntec 10W-40, a better oil and sells for about $23 per 5qt container, and no shipping............

JFP; +1 on Syntec

I switched from the Mobil1 to the 10W-40 Syntec after reading good comments here.

Like it better than the M1 and I do feel a difference mostly upon start up, it seems to run smoother. This comparison was after finally installing the Pedro's sport engine mount (nice..!) and the reduced vibration with the Syntec was noticeable.

PS, However I paid $25 at Walmart for the 5qt jug...