Ed,
So, that is how Tracy managed to win the SNF 100... he premixed Wal-Mart Super-Tech 2-stroke oil with his fuel. Good thing the tech inspectors didn't catch him doing that. Just goes to show, you learn a new "racer's trick" every day. Does Lynn know about this? LOL
Mark
On 4/1/08, Ed Anderson <eanderson@carolina.rr.com> wrote:
Ah, yes, Mark, important point!
Since it is not mineral based, there is less lowering of Octane rating of fuel mixture and therefore less likely hood of detonation. This enables me to run those rare 20:1 compression ratio rotors and produce over 300HP with my 13B. Couldn't do it without my Super-Tech Wall-Mart Oil. But, don't tell anyone else my secret {:>)
Ed
----- Original Message -----
Sent: Tuesday, April 01, 2008 2:06 PM
Subject: [FlyRotary] Re: Super-Tech was [FlyRotary] Re: 2-stroke oil
Ed,
Interesting that it says it is synthetic based.
Mark
On 4/1/08, Ed Anderson <eanderson@carolina.rr.com> wrote:
Al, back some time ago when I was using some very expensive 2 stroke oils (like over $4.00/quart) , I decided to do some research. I came to the conclusion that the Marine 2 stroke oils were probably as good as was needed for our Rotary application. Some of the 2 stroke oils designed for air cooled engines apparently have different formulations to cope with the higher temps associated. In any case, I decided the Wall-Mart Marine 2 stroke Super-Tech which meets TC-W3 standards(on the back label) (and much less costly) was more than good enough.
I no longer can find the source, but this oil was reportedly produced by PENNZOIL for Wall-Mart.
I have been using it for 4 years without any problem.
FWIW
Ed
----- Original Message -----
Sent: Tuesday, April 01, 2008 12:48 PM
Subject: [FlyRotary] Re: 2-stroke oil
For the premix oil I use any good BIA cert. TCW-3 2-stroke oil mixed 50-50 with MMO both of which come from Walmart. Any of the Redline 2-stroke oils would be excellent, including the snomobile stuff.
The only 2-stroke oil I could find at the local Walmart was called Super-Tech, and I couldn't find any certifications on it anywhere. Is MMO proven for this application? My research also indicates that the TCW-3 rating only is not recommended for watercraft (water-cooled engines), where the NMMA rating is required. So do we best get the stuff for air-cooled 2-stroke – which probably run hotter; the stuff for watercraft – which probably run cooler; or something else (other than Redline). Or is there no data to support a choice and I'm over-analyzing and it doesn't matter anyway.
Let us know if you notice any change when you go to premix. My old 1988 RX-7 felt spunkier when I started using premix in it but it was an old 150K mile beater.
If you were doing the 50-50 MMO at the time, that could make a difference. It contains both toluene and xylene which are very combustible. Some 2-stroke oils contain other octane enhancers. The Super-Tech is 'pre-diluted' ("with what"? you may ask) to make it mix more readily with fuel.
What Pre-mix ratio?? IIRC, I've heard on this list to use about 1 oz per gallon, which is about 130:1. Most 2-stroke applications are somewhere in the 20 to 50 : 1.
Al (Still grounded working on mods)
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