After searching high and low for a good 2 stroke synthetic oil I came across 2-cycle TCW III Racing from Royal Purple. (www.royalpurple.com). All I can say is whoa, initial tests shows vast improvement on engine running, including quieter running, easier starting and better rpm. My initial run was 50:1 mix and it was on a stubborn engine for running and getting the mixture right, one tank with this new oil changed my concept of this engine. I thought initially this was a fluke, however running this mixture on 4 different petrol engines of all sizes from 4 different manufacturers, rpoved to me that this oil needs to be promoted in the model world.

Yep.....very good for your WATER cooled airplane engine........

Where does it say it's for water cooled engines? I don't see that anywhere.

http://www.royalpurple.com/2-cycle-racing-oil.html

TCW is a Rating for water cooled engines, and if that's the only cert on the bottle , That means it's only been lab tested in a water cooled engine. The VERY best rating a small engine can have is JASO-FC & ISO-EGD these have been thru the most testing and can pass any test put through. IMO I would never use any oil that didnt have those ratings, but any oil that can pass all those test is pretty darn good.




"Another huge myth is you can safely use any TCW-3 certified oil in your snowmobile. WRONG! This marine rating is now very outdated as applied to snowmobiles and does not provide sufficient lubrication for many of the higher-powered snowmobile engines at sub-zero temperatures. Your higher quality oils will have a certification such as JASO-FC or ISO-EGD, so these are the standards you should be looking for."

this was taken from the AMSOIL website

TCW 3 is designiation for Two Cycle Water Cooled outboard engine oil, Royal Purple states this oil can also be used in pre-mix applications. This fashionation with oil amazes me, I might use 4 quartes a season. I suspect that I'm on the high side of many that post here. I've used Pennzoil, Belray, Amsoil, Yamalube and several others in a pinch. Been flying gas since 1989, engine failures were always the result of ground impact, never lack of lubrication. Good oil will not make a poorly constructed engine last any longer.

In response to the above comments this oil is as stated by the company - <font size="2">Royal Purple® 2-Cycle TCW III is recommended for use in both pre-mixed and oil injected gasoline two-cycle engines in outboard motors, motorcycles, jet skis, chain saws, etc. So it will do better than a water cooled aircraft engine. After running for a number of flights and getting better results than any other oil on the market in the UK.  Sarcasism is unncessary as I was trying to bring something possibly a little helpful to this forum.</font>

Seems strange how this is under their motor cycle section<a href="http://www.royalpurple.com/prod-pdfs/racing-2cycle-ps.pdf">

http://www.royalpurple.com/prod-pdfs/racing-2cycle-ps.pdf</a>

I never intended to get involved here but just out of curiosity I visited the Royal Purple site and read for myself that their TCW 111 rated oil is recommended for use as a pre -mix oil in 2 stroke motorcycles, which I assume have AIR cooled engines.

Karol

NMMA TCW-3 tests incorporate a run on a 2-stroke air cooled engine as part of the certification although the majority of the test is on water-cooled engines.

That said, the API-TC, ISO-EGD, and JASO-FC are more stringent tests and are strictly for air cooled engines.

There is a difference between the "testing regimen" and real-world experiences however.

Real world experiences demonstrate the Royal Purple TCW-III certified oil will work well in our engines.

Quote:

ORIGINAL: cornishman

In response to the above comments this oil is as stated by the company - Royal Purple® 2-Cycle TCW III is recommended for use in both pre-mixed and oil injected gasoline two-cycle engines in outboard motors, motorcycles, jet skis, chain saws, etc. So it will do better than a water cooled aircraft engine. After running for a number of flights and getting better results than any other oil on the market in the UK. Sarcasism is unncessary as I was trying to bring something possibly a little helpful to this forum.</font>

A helpful oil thread, that would be a first. Nice try though.

As Jody said getting any kind of concensis on two stoke oil in this forum would probably be a first. IMHO kinda like flying to the nearest star.

Finally!!! Another oil thread…I was going into withdrawl, and spending too much time in front of the big screen TV instead of repairing my Extra - but that's another story… Thanks, Cornishman for posting your Royal Purple experience...I have a quart to use after two engines finish breaking-in with Penz Air Cooled @32:1 ...Someone in an earlier post mentioned JASO-FC, so after Googling it, I found this premix w/ JASO-FD specs…"Quicksilver" is another brand that brings out our lube experts...I always learn something new from these oil threads...
-Ken

http://www.mercurypartsexpress.com/u...s-p264741.html

"Oh no, Mr. Bill, not another oil thread input'' But, here is some interesting information that I am offering without comment:

http://oil-store.com/

But, "whatever floats your boat" (Oops, perhaps not a good comment considering the TC vs TW issues of the oils in discussion.)

Thanks Ken for the link to the Quicksilver "Rejuvenate" oil. I've been using Quicksilver in my old Mercury outboard for many trouble free years and I think I'll give that "Rejuvenate" formula a try when I fire it up again after a long storage period and just in time for the speckled trout season.

i used to take the family fishing for specks off pensacola and ft. walton beach in my 16-footer...used evinrude oil, which looked like belray mc-1...bounced lead-head artificial shrimp on the bottom, or live shrimp for bait...good luck this fishing season...ken

I've heard that if you soak the live bait in Amsoil, at 100 to 1 of course, you'll catch more fish!

wow...i didn't expect this thread to fall apart so quickly...i suggest we try to focus on royal purple...has anyone tried soaking live shrimp in royal purple, and did they catch more speckled trout that way? maybe i should cover my keyboard with saran wrap before the more experienced oil posters chime in...lol...ken

Gotta have some fun with these oil threads.Lol
It is interesting to follow them, and sometimes I even learn something!

What would we do without oil threads?

True, but you'll have to deal with de-carbonizing your fillet knife blade after cleaning the fish that have fed on the Amsoil laden baits!... OK, That's enough clownery. Back to the Royal Purple!

Whatever you do, don't soak your bait in Lawnboy oil, all you'll catch is black slimy jellyfish! [X(]

OK here's my .02 I've been flying gassers since 1985 and used Amsoil at 1.5oz's to the gallon ( around 90-1) and never had an oil related failure, as a matter of fact no failures with the exception of a too lean run on my BME 102 (my fault) so I'm sticking with what works for me. I have tried Pennzoil, Redline, Lawn boy and Bel-Ray, but always went back to the AMS

Actually that works out to 85:1, and maybe one of those other oils at a 40:1 mix ratio might have saved your cooked engine.

Karol

I seriously doubt that

Oils and their respective properties at various ratios certainly have an affect on the user's margin for error in proper cooling and tuning. I wouldn't be so quick to doubt what may have saved your engine, when a little larger margin may have been all you needed.