HibachiZ28

iTrader: (5)

I did a search. This really wasn't covered. My buddies told me to switch to Royal Purple. So I went out last night and purchased 6 quarts of the 10W30. My LT1 is my daily driver, as well as going to the dragstrip. I typically run Mobile 1 Fully Synthetic, 10W30.

After coming home I realized what I had read here, about the Royal Purple XPR. Per their website, it states the regular RP "delivers superior protection and improves performance in four-cycle gasoline and diesel engines." The XPR "for applications such as racing, modified engines and off-road use. XPR’s high film strength make it exceptionally well-suited for today’s high performance cars and trucks, particularly turbo and supercharged engines and / or engines using a nitrous boost."

So... Should I take all 6 quarts back and purchase the XPR? Or am I better running the regular Royal Purple?

EDIT: Called Royal Purple when they opened. And the XPR is double the price of the regular stuff.. so roughly $15/quart. I'm running the regular stuff (Still fully synthetic).

Here's the XPR:
http://www.royalpurple.com/xpr-racing-oil.html

camar0corey

iTrader: (22)

I've been running the normal Royal Purple for over 3 years now, no issues. XPR must be some new stuff? Never seen it before.

Marc3.4V6

iTrader: (1)

I don't think your car is nasty enough to be worth the extra price per quart. Reg RP should be more than enough.

HibachiZ28

iTrader: (5)

I added a link to the HPR. I'll be fine with the none HPR. Don't feel like spending $90 on oil. $45 is bad enough.

I8ASaleen

iTrader: (9)

RP is expensive enough as it is. I can't pay the $7 a quart anymore, so this'll be my last RP oil change...done it for 2 years with no issues but it's just too expensive.