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Old 10-26-2009, 04:37 PM   #1
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2 Stroke Oil??

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Hi Guys,

I am about to run my first DL30 Gas motor and have never owned a gasser before. After reading many forums on the topic, is there a particular 2 stroke oil that is better than any others? Some say use ashless, some not, some say synthetic, others not. Quite confusing.....

Seems that the most common concensus that that Stihl 2 stroke chainsaw oil is the best and Lanwnboy Ashless is the worst! I have no idea

Also, some suggest running it in using a 18x8 prop. I only have a 19x8 which is the suggeted on to use once break-in is complete. Is it Okay to use the 19x8 for break in as well?

It was suggested that I change the standard plug which I have done. Any other suggestions would be great.

Please help me to decide. I know that lots of you have much experience and I really want to get this right the first time.

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Old 10-26-2009, 05:05 PM   #2
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Talking Re: 2 Stroke Oil??

Hey Buddy,

I am running in a DLE 30 outside right now, guess what

NGK CM6 Plug
Sthil Premium Oil (Mineral based) 25:1
18X8 prop

On the 6th hour, idles at 2000 no sweat, can get down to 18-1900

Just put Fuel Through it, you'll be good.
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Old 10-26-2009, 06:25 PM   #3
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Re: 2 Stroke Oil??


Ya ................ there is always a problem of listening to to many people .

But here there both right , use ahles sfor the first couple of gallons and than go to a synthetic . The problem with the Sthil is that , this chain saw oil is made to work at very high RPM , and really work . All you need is good lubrification . IMHO , stay away from 100:1 and keep youre mix at 40:1 ( minimum ) with a synthetic oil mix , after break-in . Think of the KISS system . Personally .............. I,ve heard Belray is about the best you can get , and I,ve heard it several times over , although I use RedLine

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Old 10-26-2009, 07:02 PM   #4
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Re: 2 Stroke Oil??

What Club do you belong to? Might be some gas heads in the club that could help.

If the DL30 is like my DLE55 then breakin should be with 32:1 mix and definitely an ashless mineral oil. I have no experience with the Stihl brand but have brokin in about 1/2 a dozen gassers ALWAYS with LawnBoy and never had a prroblem.

5 gals minimum for breakin to seat that ring nicely. After breakin a good Synthetic oil at 40:1 is what the 55 calls for but it should be in your manual. I am using Motul 50:1 mix, mixed at 40:1 on the DLE55 this past season with good results.

For my DAs I like to use 100:1 Amsoil, as they recomend. You could use Amsoil as well but look for their 50:1 mix which i think they call Interceptor and mix at 40:1 or 32:1 if you like. Again the DL30 may recomend different oil contents. To high of an oil content will only buildup carbon on the top of the piston and in the plug.

I'll asy it again, like I do to ALL my customers... RTFM.... Read the Freakin Manual and do as the manufacture recomends, they no best over a bunch of engine guru wanabees on RC Forums!

As for props AGAIN if manufacture recomends 18x8 the BUY an 18x8... Don't cheapout on $30.0 for another prop just to ruin a $400.00 engine. To much of a load will overheat the engine.
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Old 10-27-2009, 12:36 AM   #5
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Re: 2 Stroke Oil??

You are going to get a lot of different opinions on which oils to run and what mix to run at. Main thing is to tune the engine right at the start (don't have it run rich, it is not a glow engine). Never run it lean. I have used Amsoil Dominator at 40:1 and 50:1, used Lucas oil at 40:1 and Yamalube at 40:1. From the above 3 oils I used, I prefer the Yamalube, it runs cooler than the other two and easy to get. I will be looking into my engines soon to see what they are like after running the Yamalube for most of this season (after switching from Amsoil after about 15 gals). I am interested to see what a local flyer here that started using the Redline oil about 2 months ago, so far he like the results (he was using Penzoil air cooled oil). Also interested in the Stihl oil, seems like good things are said by those using it. Maybe I will try that oil next season. Best thing is to never mix thinner than 40:1 (cost me some repairs). For break in's, I used what ever oil I was running at the time but mixed it at 32:1 for the first 5 gals. A local flyer here broke one in on lawnboy and then others on regular oil, he did not see any benefit on breaking in with the lawnboy so now only breaks in with the regular oil he is going to run with but mixed at the 32:1 for the first few gals. He also tunes it correctly right from the start (no rich settings).

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Old 10-27-2009, 07:29 AM   #6
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Re: 2 Stroke Oil??

Thanks gents,

Seems from the feedback that almost any commercial grade will work. I see that the most important issue is mixing the right ratios. I have not read anything that says specifically NOT to use a particlar brand. The manual says absolutely nothing about this.

Thanks to all that replied and please keep them coming.

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Old 10-27-2009, 07:59 AM   #7
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Re: 2 Stroke Oil??

This a issue that I am still wrestling with. D/A tells me to go with Amsoil at 100:1, but I am somewhat uncomfortable with this ratio. I have selected Amsoil Sabre Professional, which will allow me ratios from 40:1 to 100:1. Haven't decided what ratio to go with, but 80:1 maybe where I will start. I have attached a document that I found on the net. Seems like it is directed a Aircraft engines. Interesting reading. Sorry Had to zip the file to get it to upload. It is a pdf, but the file size was to large to allow upload as pdf.
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File Type: zip Oil Tests for Airplanes Summary.zip (144.1 KB, 92 views)

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Last edited by Steven Dew; 10-27-2009 at 08:29 AM.
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Old 10-29-2009, 09:12 PM   #8
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Re: 2 Stroke Oil??

Thanks again guys for your input - and thanks Steven for your attachment - really interesting stuff. From that, seems that the Belray is the winner for me anyway. Interesting that it is the only oil that lubricates only, but does not actually ignite - therefore usese a little more fuel, but little or no carbon is produced as a bi-product. Very Interesting!
This guy who produced the article seems to have delivered an unbiased and very detailed and useful report. Great find.


Last edited by NewGuy; 10-29-2009 at 09:15 PM. Reason: Spelling
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Old 10-31-2009, 08:36 PM   #9
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Re: 2 Stroke Oil??

Were you able to find Bel-ray? Where?
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Old 11-02-2009, 11:19 PM   #10
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Re: 2 Stroke Oil??

You can find Bel-Ray (MC-1) at most motorcycle shops...
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