For those wondering about Royal Purple Oil

[branwell]

Yes, I'm like Mikey, I'll try anything.

Royal Purple. The latest in horse power increasing wonder oil. Or so some on FG would have you believe. ( WildThang, I am going to come for that 150 now )

Was running the finest Craftsman dino oil for run in on a new DA100L. 6 Gallons total.

Changed to the Royal Purple wonder lube and......................

Hmmmmmm.....

No extra power static. It might have unloaded a little more in the air, but nothing that makes me go WOW.

One thing it did do was knock the head temps down 30 degrees which is good, but made a heck of a mess on the bottom of the plane, not so good.

Branwell

[jack strickland]

	Quote: Originally Posted by branwell
	Yes, I'm like Mikey, I'll try anything. Royal Purple. The latest in horse power increasing wonder oil. Or so some on FG would have you believe. ( WildThang, I am going to come for that 150 now ) Was running the finest Craftsman dino oil for run in on a new DA100L. 6 Gallons total. Changed to the Royal Purple wonder lube and...................... Hmmmmmm..... No extra power static. It might have unloaded a little more in the air, but nothing that makes me go WOW. One thing it did do was knock the head temps down 30 degrees which is good, but made a heck of a mess on the bottom of the plane, not so good. Branwell

Did the mess on the bottom of the plane come from the tank vent/overflow during wild aerobatics, or are you saying this was excess oil. This was a problem on my planes till I ran the tank vent/overflow back to the rear of the fuse near the tail wheel. The problem went away. Just a thought. A reduction in head temps is certainly better than good, imho.

[branwell]

Hi Jack,

There is no mess forward of the tune pipe outlets ( rear outlets ), and there was far less mess behind them with the dino oil.
I've seen the same behavior ( more mess ) with other synthetic oils, especially those designed for racing. Given that I mixed it at the same 32-1, my guess is less of the synth is burning off.

As to running cooler, I'll try some of the other synths I have on hand and see if its a byproduct of the Royal Purple, or if its just that my run in oil was so nasty ( quite likely ).

Branwell

[cjcyclesrc]

	Quote: Originally Posted by branwell
	Hi Jack, There is no mess forward of the tune pipe outlets ( rear outlets ), and there was far less mess behind them with the dino oil. I've seen the same behavior ( more mess ) with other synthetic oils, especially those designed for racing. Given that I mixed it at the same 32-1, my guess is less of the synth is burning off. As to running cooler, I'll try some of the other synths I have on hand and see if its a byproduct of the Royal Purple, or if its just that my run in oil was so nasty ( quite likely ). Branwell

Redline @ 40:1 does oil the plane some. I'll take a little oil residue rather than hard baked on Carbon anyday.

[branwell]

I've got a few quarts of the RoyalP and Bell Ray to get through, and then I plan on trying the Red Line.

[tonyc9075]

	Quote: Originally Posted by branwell
	Hi Jack, There is no mess forward of the tune pipe outlets ( rear outlets ), and there was far less mess behind them with the dino oil. I've seen the same behavior ( more mess ) with other synthetic oils, especially those designed for racing. Given that I mixed it at the same 32-1, my guess is less of the synth is burning off. As to running cooler, I'll try some of the other synths I have on hand and see if its a byproduct of the Royal Purple, or if its just that my run in oil was so nasty ( quite likely ). Branwell

Wasn't the Roayl Purple designed to be used 100-1?

[IMACmike]

I have been running Redline @ 50:1 (within mfg's recommendations) in both my DA 100's and 150's with NO ill effects on the engines that I can see and the mess is about half of what it was at 40:1. IMHO, if you aren't getting some oil residue on the bottom of the airplane, you don't have enough oil in the mix....

[hpapilot]

I know a few running Royal Purple at 100:1 and one at 50:1. One friend running it at 100:1 reported much better power than Amsoil, with similar head temps. After a while it started to run hotter than before, but richening it a bit solved that seemingly without effecting power.

[KnowCrashes]

32:1 is your problelm, period. Run it at 85 or 90:1. The get back to me.

[branwell]

Hi Tony,

The back of the can has a mix chart from 24-1 to 100-1. I mixed it at 32-1.

I have a sneaking suspicion that much of the extra power people see is the result of a change in the air / fuel ratio caused by the various oils viscosity and mix ratios.
I've seen it myself with Bel Ray, but when I peak tune the motor, it all equals out.

Branwell

[smokin]

with a lesser mixture, i.e. 80 or 100:1 you'll see more rpm and power out of her. i like to run at 50:1 and stay there but the purple guys tell me i need to be at 100:1..... i love the purple, i just love it to the tune of a 50:1 mixture. i have NO greater mess issues with this oil and i know i have less carbon build up. it does improve the head temps as well. it's good oil.

[cjcyclesrc]

I don't buy the "Less Oil = More Power" belief.

[shadow1100]

I just switched to Royal purple and had the same discovery you did. The bottom of my plane had to be recovered 3 times from the oil residue. This was TOTALLY MY FAULT!!!! This oil needs to be mixed no less than 60:1 and even so my temps are crazy LOW 160's in Georgia in JULY!! My 2 cents= stay with purple and mix it to your comfort level but not 32:1

Steve

[N726AC]

Very little oil residue at 80:1. Happy with temps.

[wallygator]

	Quote: Originally Posted by N726AC
	Very little oil residue at 80:1. Happy with temps.

Same here not a trace of residue on the plane. 32-1 is way rich and you probably are burning off the dino oil carbon too boot. More power, I'm not sure because that's the only oil I have used in my DL. 80-1 is right there in my book, people resisted 80-1 when Bel-Ray cam out in the 70's we learned!