i am approaching yet another oil change and i have read almost all of the articles on royal purples website http://www.royalpurple.com/techa/faqsa.html#re2..is anyone on this website using royal purple motor oil? did you see an increase in HP? and how often do you change your oil, and how many quarts did you buy

 

Cut and pasted from the website of Racing Beat, one of the foremost authorities on rotary engines:

Royal Purple Synthetic Lubricants

Racing Beat has been recommending the use of synthetic oils in rotary applications for several years. Our research has found that synthetic oils provide superior friction reducing between sliding surfaces, reduced foaming, and lower oil temperatures. We have tested several different synthetic oils and have found that while most offered improved wear and lower oil temperatures, none offered any horsepower gains... except for Royal Purple!

Our in-house testing has yielded up to a 2% performance increase after changing from mineral-based oil to Royal Purple Synthetic Motor Oil. How could this be? Jim Mederer, co-founder and chief engineer at Racing Beat, was truly puzzled. With over 35 years of professional racing experience under his belt, he has seen and tried just about every “new” lubricant that hits the market. All offered better wear and lower oil temperatures but none offered any horsepower improvement. After spending time consulting with the engineers at Royal Purple to better understand the reason for the horsepower gain, it was explained that the secret was the proprietary ingredient “Synerlec”. This Synerlec ingredient provides an ultra-slick film on internal engine components to significantly reduce power-robbing friction. Less friction equals more power!

Other professional engine builders have confirmed that Royal Purple Synthetic Racing Oil delivers measurable horsepower gains. Independent dyno tests show increases up to 5% (on smaller displacement engines) with nothing more than an oil change.

Rotary vehicle owners, do you have questions such as these?

"Can Royal Purple Motor Oil be used in a rotary engine?"
"Mazda makes a statement in the Owner’s Manual not to use synthetic oils in a rotary engine, why do you say that it is OK?"
"I heard that synthetic oil doesn't burn like mineral based oils and will coat the inside of the engine with deposits."

Well, we have some good news! Royal Purple has added a section to their FAQ page on their corporate website that answers these important questions. To review this page, follow this link.

 

i use it in my trans and dif but for me it is too expensive to use in my oil changes

 

If you got the money to change it the same intervals as normal oil, go for it. While it says you can run it longer, I don't really trust it. FWIW, the previous owner of my car ran it once and said it ran noticably smoother. I don't think you'll see any power increases, but the engine might run smoother.
Also, before people post otherwise, royal purple has been proven to burn even cleaner than Castrol GTX. I can't find the chart, but I know it exists.

 

One of the executives at Royal Purple used to own an RX-7. I've forgotten his name (Dave something). He and I exchanged a few messages about his products. He said that in their testing, they found:

1) an increase of 2 - 3 hp (measured on the dyno)

2) RX-7s with turbo motors would get fuel dilution of their crankcase oil, though N/A cars did not. His theory was that the higher pressures forced fuel past the seals.

So, he recommended that turbo cars change oil at normal intervals, even when using synthetics, including Royal Purple.

 

My friend and I switched to Royal Purple 20W50 oil and Racing - Street-ported NGK Racing sparkplugs from Racingbeat and noticed a great increase in horsepower. This was done in a JDM 91 turbo II engine. I'll never be able to go to anything else :p We bought 5 quarts of oil for each engine, and we change it about every 1500 miles due to racing the car.

 

i plan on changing the oil every 1500 miles as well im at 1300 right now so from what ive heard and read its a good product so ill purchase it today when i get the time. im probubly going to get it from racingbeat but does anyone know if there is anywhere that is cheaper

 

I found a place that was a little cheaper a few years ago. I'll have to dig around and see if I can find it again.

 

1500 miles are you serious dude you are just wasting an *** load of money even buying royal purple if your gonna change it that soon. if you are changing at 1500 now go to 3000 on royal purple if not more it does last longer than conventional oil and at the prices of royal purple i would use it till it started to get black then ditch it. but if you do change your "royal purple" at 1500 send it to me and ill run it in my truck lol it wil still last me a while.

 

i went to check my oil level the other day(using royal pruple) and it was almost at empty!!! this is about a month after i did an oilchange.... does the engine usually burn through that much oil...it isnt leaking anywhere(no spots on the ground or on the engine).......

 

You went for a month without checking your oil? Tsk tsk
Anyway, that is a good bit above normal consumption. Are you seeing any smoke out of the exhaust?

 

i switched to royal purple and my engine seems to idle a lot better. not too sure about hp gains. and it should last a little more than a month?

 

I believe it should only use about a quart every 3k miles once its broken in.

 

it smokes at start up but only a little bit and doesnt last long could that be the problem

 

I noticed quicker oil consumption with Royal Purple as well. I'm just sticking to Castrol GTX now. It's 5 bucks a pop cheaper and the differences in all aspects between it and Royal Purple are minimal.

Granted, sounds like your engine is thirstier for oil than the average rotary.. and that's saying a lot.

 

That's about the rate at which mine burns....seems to be fairly common to lose close to a quart over 3K miles...

 

I use RED LINE synthetic 10W30 in my N/A gxl it is more affordable.I keep the oil level right and i change my oil and oil fiter of course every 6000 to 7000 miles. i know it seems high but the oils these days a much cleaner and cleaner burning. that is not a out of norm driving length for a good synthetic. I have never run ROYAL PURPLE. but RED LINE has been working great for me the last 4 or 5 years it will increase your gas milage a bit over mineral based oils

 

I would say a quart every 1,000 miles would not be unusual. Basically, add a quart a month, change every 3 months.