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Old 03-20-2008, 09:17 AM   #1
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Ready for synthetic oil ?

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Hi guys ! I have almost only 2 gallons of gaz thru my zenoah 20cc and my DA-50. Do you think I could transfert to synthetic oil at this time or should I wait ? Thanks ! Paul
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Old 03-20-2008, 11:45 AM   #2
Gary Maker
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Re: Ready for synthetic oil ?

Originally Posted by sylo26
Hi guys ! I have almost only 2 gallons of gaz thru my zenoah 20cc and my DA-50. Do you think I could transfert to synthetic oil at this time or should I wait ? Thanks ! Paul
I'm not too sure about using Synth oil in a Zenoah at least I've never heard of it or ever seen it recommended.

The DA50 on the other hand, it is recommended to go to 100:1 Amsoil Synth after breakin. I would think that after only 2 gal of 40:1 ashless 2 stroke oil mix is a bit soon to be switching over although I do know some guys who have switched that soon.

Personally, I used 4 gals of the 40:1 mix before switching over to the Amsoil Synth. Give it a chance to get everything seated and worn in properly first. Switching too soon means that IF things are not seated and broken in as yet, it will take a very long time to happen and your engine will not be running at peak performance until it does settle in.

Just my opinion and I'm sure there will be other varied opinions on this subject.

NOTE: I have had two different DA50 engines and currently own 2 Zenoah engines, a G26 CDI and the newer G20ie. Also have a DL50

Interesting note on the DL50: A 30:1 ashless 2 stroke air cooled oil mix is recommended for break-in and thereafter a Synth 50:1 only mix is recommended.
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Old 03-20-2008, 12:00 PM   #3
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2 gallons through a 50 cc size motor = a fair amount of run time, where as 2 gallons through a 170 cc size motor is just a few flights. Don't equate amount of fuel to run time. I would say two gallons is probably enough, but more importantly does the motor feel like is has smoothen out? If it has, then usually that is about the time I switch over.
Although running break in oil for a little longer is not going to hurt your motor.

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Old 03-20-2008, 12:55 PM   #4
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When in doubt read the manual;

From Page 5 of the DA 50 manual;
For Break-in, we recommend a petroleum-based oil such as Lawn Boy Ashless or Pennzoil Air Cooled 2 stroke oil at 32:1 ratio. Run at least 2 to 4 gallons of petroleum oil/gas mix for break-in. This allows the rings to seat quickly without blow by. Use a prop that allows peak RPM over 6.500 during the break-in process. Set the High needle slightly rich during break-in.
After the break-in process, we recommend a high quality synthetic oil. As for brand of oil, there are many good ones on the market. Some oils, and their mix ratios, that Desert Aircraft recommends are: Amsoil 100:1 Pre-Mix (100 to 1), Amsoil Saber Professional (100 to 1), Amsoil 2000 (50 to 1), Red-line (40 to 1), Bel-Ray H1-R (50 to 1). Mobil MX2T (32 to 1) These oils can be found at most motorcycle shops.

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