More HP?
Administratus Emeritus
Certified Car Nut
Joined: Jan 2006
Posts: 16,539
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From: Purgatory, Pennsylvania
Well thanxs for being good natured about it 
. I just dont think Royal Purple is a good move at $8 bucks a quart. I have used several synthetics over the nearly 40k on my GXP. Havent felt any difference on the old "butt dyno". But saved a few bucks getting whatever name brand synthetic is on sale at WallyWorld including MobilOne/Castrol/Valvoline.... and even NAPA synthetic. They are all good. What does make my butt feel a difference is my nitrous, and at $50 a bottle. I need to save all I can...
. I just dont think Royal Purple is a good move at $8 bucks a quart. I have used several synthetics over the nearly 40k on my GXP. Havent felt any difference on the old "butt dyno". But saved a few bucks getting whatever name brand synthetic is on sale at WallyWorld including MobilOne/Castrol/Valvoline.... and even NAPA synthetic. They are all good. What does make my butt feel a difference is my nitrous, and at $50 a bottle. I need to save all I can...
Thread Starter
Junior Member
Posts like a Ricer Type-R
Joined: Oct 2008
Posts: 20
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From: MA
haha its fine, yeah i just picked it up at Walmart for 6 bucks a quart!! i also got high intensity head lights and fog lights 
plus new windsheild wipers... thats good for what atleast 20 hp???
plus new windsheild wipers... thats good for what atleast 20 hp???
Looks good on paper? Right? Hehehe
Retired Senior Admin
Expert Gearhead
Joined: May 2006
Posts: 29,661
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From: Sheboygan Wisconsin
Keep in mind that 1% to 2% is well within the margin of error on a dyno. My guess is much of that increase came from a colder engine. There are far to many variables when it comes to HP, Air time, timping, fuel, you name it. Take 5 dyno pulls and you will get 5 different results, even if you make no changes. Royal purple is over priced, not worth $7+ per quart.That may have changed, when I looked that'* what they wanted.
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Certified Car Nut
Joined: Oct 2003
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Keep in mind that 1% to 2% is well within the margin of error on a dyno. My guess is much of that increase came from a colder engine. There are far to many variables when it comes to HP, Air time, timping, fuel, you name it. Take 5 dyno pulls and you will get 5 different results, even if you make no changes.
Thread Starter
Junior Member
Posts like a Ricer Type-R
Joined: Oct 2008
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From: MA
where i live its 6 bucks a quart the same as any other one and royal purple is just better for your engine so ill take it anyday of the week if its the same price
Retired Senior Admin
Expert Gearhead
Joined: May 2006
Posts: 29,661
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From: Sheboygan Wisconsin
If you can get it at a good price, then feel free to use it. I don't know of any club members running royal purple. Most run Mobil 1. So let us know how it works.