logo
Reply
Thread Tools
Old 02-10-2008, 10:15 AM
Registered User
mikel7099's Avatar
Pa
Joined Sep 2006
1,569 Posts
DL-50 OIL ???

For a DL-50 Engine for break-in, is it ok to use Lawn Boy Ashless @ 32:1 mix ratio? If not what is everyone using at what mixture?
mikel7099 is offline Find More Posts by mikel7099
Reply With Quote
Old 02-10-2008, 10:30 AM
Shane Quale
iflyrc3Dstyle's Avatar
Necedah, WI
Joined Mar 2006
768 Posts
Re: DL-50 OIL ???

Mike,

www.dlusa.net says that you should use a ratio of 30:1 but I don't see why 32:1 would not work. You might want to call Bob and ask him just to make sure there is no warranty issues. Hope this helps.
iflyrc3Dstyle is offline Find More Posts by iflyrc3Dstyle
Reply With Quote
Old 02-10-2008, 10:57 AM
Barking-Tip Bandit
Flyinhigh's Avatar
Austin, TEXAS
Joined Jan 2006
571 Posts
Re: DL-50 OIL ???

I know there are many varying perspectives on oil, but I have had great experience running Penzoil Aircooled 2-stroke, and break-in with 36:1 for about a gallon on a 50 cc before switching to synthetic. Pennzoil Aircooled builds up less carbon than Lawn-boy, and at 36:1 will still facilitate good ring seating, friction resistance, and minimal build-up ( I went with "middle of the road" between the guys who claim 32:1 and those who prefer 40:1 for break-in)

Again, this is just my perspective from limited personal experience.
Flyinhigh is offline Find More Posts by Flyinhigh
Reply With Quote
Old 02-10-2008, 11:54 AM
Registered User
Al Lewis's Avatar
Port Orchard, WA
Joined Nov 2007
6,910 Posts
Re: DL-50 OIL ???

I,m running Belray H1R in mine at 40:1 for break-in and the rest of its life. Just my opinion but I don't see any point in all of the "break-in" "normal running" oil disputes. I'm getting 7400 rpm on a Vess 23A and am very happy with the engines performance with that mixture.
Al Lewis is offline Find More Posts by Al Lewis
Reply With Quote
Old 02-10-2008, 12:27 PM
Registered User
mikel7099's Avatar
Pa
Joined Sep 2006
1,569 Posts
Re: DL-50 OIL ???

What about Mobil 1 Racing 2T at a 40:1 mix. I would like to use the mix for my ZDZ 80-RV and the DL-50.
mikel7099 is offline Find More Posts by mikel7099
Reply With Quote
Old 02-10-2008, 12:32 PM
Registered User
Al Lewis's Avatar
Port Orchard, WA
Joined Nov 2007
6,910 Posts
Re: DL-50 OIL ???

Although I know of Mobil's great reputation I've never used it. The Belray H1R is pure synthetic and is a 50:1 oil. It's available in most cycle shops. I figure at 40:1 the engine should last forever. They's even send you free stickers if you e-mail them. LOL
Al Lewis is offline Find More Posts by Al Lewis
Reply With Quote
Old 02-10-2008, 12:35 PM
Barking-Tip Bandit
Flyinhigh's Avatar
Austin, TEXAS
Joined Jan 2006
571 Posts
Re: DL-50 OIL ???

I prefer the Mobil 2T at 40:1 over all others, but that oil was discontinued, so I refrain from recommending it. If you can get your hands on the stuff it offers excellent overall performance, in my experience. I like it so much I bought 3 cases when I found it was discontinued.

I agree that an extensive break-in on natural oils like Lawn-Boy or Pennz may not be necessary, but they will get the rings set at least twice as fast as a full synthetic break-in right from the start. If you really want to get the engine to offer reliability in a hurry, a few flights on Natural will expedite the process. I do understand, however, that breaking-in with synthetic from the start will keep an engien cleaner over the long run.

Running Belray synthetic (HR-1 or MC-1) at anything richer than 50:1 won't offer more protection - it will only coat the internals with harmful build-up. I am a fan of Bellray MC-1 myself, and have gotten excellent performance at 50:1. Running a richer mix is not recommended and can have negative effects.
Flyinhigh is offline Find More Posts by Flyinhigh
Reply With Quote
Old 02-10-2008, 12:52 PM
Registered User
mikel7099's Avatar
Pa
Joined Sep 2006
1,569 Posts
Re: DL-50 OIL ???

Quote:
Originally Posted by Flyinhigh View Post
I prefer the Mobil 2T at 40:1 over all others, but that oil was discontinued, so I refrain from recommending it. If you can get your hands on the stuff it offers excellent overall performance, in my experience. I like it so much I bought 3 cases when I found it was discontinued.

I agree that an extensive break-in on natural oils like Lawn-Boy or Pennz may not be necessary, but they will get the rings set at least twice as fast as a full synthetic break-in right from the start. If you really want to get the engine to offer reliability in a hurry, a few flights on Natural will expedite the process. I do understand, however, that breaking-in with synthetic from the start will keep an engien cleaner over the long run.

Running Belray synthetic (HR-1 or MC-1) at anything richer than 50:1 won't offer more protection - it will only coat the internals with harmful build-up. I am a fan of Bellray MC-1 myself, and have gotten excellent performance at 50:1. Running a richer mix is not recommended and can have negative effects.
I just wanna try to run the same mix for both engines and not worry about all different gas cans and mixes and drag different fuel cans to the field. I ran the Mobil Synthetic for break in on my ZDZ with no issues, so using Synthetic or non Synthetic for break in i have no preference. If you really liked the Mobil that much i can email you a link were you can buy it but they only sell cases.
mikel7099 is offline Find More Posts by mikel7099
Reply With Quote
Old 02-10-2008, 01:05 PM
Registered User
Schiller Park ,IL
Joined Feb 2006
712 Posts
Re: DL-50 OIL ???

Use a lot of Petroleum based oil....30:1 ....messy, but good. 32:1 Lawnboy is what I am using in my 2ND DL-50....

Because, I don't want it to BLOW UP, like my first that I ran on AMsoil Dominator 50:1. Oh, that is the first engine of mine to lunch on AMSOIL 50:1. EVER. ( bottom end wiped out)

So, Lawnboy and lots of it, for this one, maybe it will last longer.....maybe. The first one is a paper weight now. We will see how long before this one joins it.

250 bucks more for a DA looks like bargain, now. CAVEAT EMPTOR.
bosshoss is offline Find More Posts by bosshoss
Reply With Quote
Old 02-10-2008, 01:11 PM
Registered User
Al Lewis's Avatar
Port Orchard, WA
Joined Nov 2007
6,910 Posts
Re: DL-50 OIL ???

Maybe you should mention the conditions you flew the plane, had it flown, under. LOL As I recall, lunching that engine was your intent from the start to see how long they lasted. Got close to 30 gallons through it with continuous use as I recall. They have FAG (German) bearings which are one of the best in the world so with normal use and good lubrication they should last a very long time.
Al Lewis is offline Find More Posts by Al Lewis
Last edited by Al Lewis; 02-10-2008 at 01:21 PM.
Reply With Quote
Old 02-10-2008, 01:15 PM
Registered User
mikel7099's Avatar
Pa
Joined Sep 2006
1,569 Posts
Re: DL-50 OIL ???

I know one thing. I don't want to lunch mine.
mikel7099 is offline Find More Posts by mikel7099
Reply With Quote
Old 02-10-2008, 02:00 PM
Bad-ass Super Contributor!
rcign's Avatar
Williams, Az USA
Joined Jan 2006
2,439 Posts
Re: DL-50 OIL ???

Betcha it wasn't the FAG crankshaft bearings that went bad....
It would be interesting to see if the crank pin failed like the DAs with the wrong material, or the roller bearing....
And the manufacturer of the caged roller big end bearing....
rcign is offline Find More Posts by rcign
Reply With Quote
Old 02-10-2008, 02:06 PM
Registered User
Al Lewis's Avatar
Port Orchard, WA
Joined Nov 2007
6,910 Posts
Re: DL-50 OIL ???

I take it they weren't forged 4340 Ralph?
Al Lewis is offline Find More Posts by Al Lewis
Reply With Quote
Old 02-10-2008, 02:55 PM
Bad-ass Super Contributor!
rcign's Avatar
Williams, Az USA
Joined Jan 2006
2,439 Posts
Re: DL-50 OIL ???

Don't know, Dave said the originals were OK, then the supplier changed the material...About 1000 bad crank pins got out before the error was discovered...No problems since...
A&M used hardened steel dowel pins, they didn't last too well either...Brison apparently fixed THAT problem....
Designing engines is not as easy as some people would think.....
rcign is offline Find More Posts by rcign
Reply With Quote
Old 02-10-2008, 03:01 PM
Registered User
Al Lewis's Avatar
Port Orchard, WA
Joined Nov 2007
6,910 Posts
Re: DL-50 OIL ???

I'm well aware of that. I design machines and tooling to repair and refuel our submarine and carrier fleet for the DOD as a toolmaker. I have to deal with a lot of different materials and alloys every day. They all have their strong points and their weak points but if you choose the wrong one for the wrong application, disaster. Personally I wouldn't make a crank out of anything but forged 4340. As for hardened dowels??? Who's idea was that??
Al Lewis is offline Find More Posts by Al Lewis
Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Best oil mix for DA 50 TazmanianDevil Gas Engines 166 12-24-2011 12:57 PM
Smoke Systems?? Dean Allison Australia 64 11-29-2010 12:29 AM
Changing the oil (men vs women) ShortBus Humor 34 07-02-2010 11:56 PM
DL 50 MOTOR webby Gas Engines 13 03-06-2010 12:00 AM
DL 50??? Sukhoikid Gas Engines 20 02-11-2008 03:11 PM