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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
Break-in oil
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. It seems everyone recommends synthetic oil for break-in and after. Its my understanding that synthetic oils prevent proper seating ...  | | 
10-02-2008, 09:24 PM
|  | Master Motorized Bicycle Builder | | Join Date: Sep 2008 Location: Seattle
Posts: 226
| |  Break-in oil
It seems everyone recommends synthetic oil for break-in and after. Its my understanding that synthetic oils prevent proper seating of new piston rings. I'm an old school 2 stroker and I love the smell of 2 stroke oil in the morning; smells like victory!  I'm willing to use synthetic but I'm hesitant to break-in w/ it. Thanks! |
10-02-2008, 09:37 PM
| | Senior Motorized Bicycle Builder | | Join Date: Aug 2008
Posts: 95
| | Re: Break-in oil
That synthetic smells funny, don't it?!
I'm thinking of trying a blend with castor bean oil. But I can't help worrying that castor oil in the morning smells like punishment!
:-/
Brenton |
10-02-2008, 10:17 PM
|  | Master Motorized Bicycle Builder | | Join Date: Aug 2008 Location: Tucson, AZ USA
Posts: 276
| | Re: Break-in oil
I've heard many things about breaking in an engine. Including using regular oil for the first 2 gallons of fuel then switching to synthetic. Perhaps the powers that be on the board could put together a definitive break in procedure thread and post it in the Classic section!
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10-02-2008, 11:38 PM
|  | Senior Motorized Bicycle Builder | | Join Date: Jun 2008
Posts: 99
| | Re: Break-in oil
me and my girl use amsoil saber at the 20\1 mix during break in and the same after .the rings did great. use thatand you will be ok. i am 100% an amsoil fan.
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10-03-2008, 12:05 AM
| | Master Motorized Bicycle Builder | | Join Date: Sep 2008 Location: Seattle
Posts: 226
| | Re: Break-in oil
Thanks I'll check it out! |
10-03-2008, 09:18 AM
|  | MODERATOR | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 4,723
| | Re: Break-in oil
That is an old wives tale. Use synthetic or "dino" for break in.
What is more important is that you vary the throttle amount and engine rpm a lot during the first 10 minutes to get the rings seated properly.
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If it ain't broke, and you mess with it long enough, it will be. |
10-03-2008, 10:26 AM
| | Master Motorized Bicycle Builder | | Join Date: Sep 2008 Location: Seattle
Posts: 226
| | Re: Break-in oil
Wives tale? My wife doesn't tell stories about oil (sigh, Imagine a world), but engineers do and some manufacturers say not to use synthetic until after break-in. 10 minutes? Possibly 100 mi on this little motor, but when I bought a cylinder/piston kit for my Guzzi I was advised to vary my driving for 500 mi and a 1000 mi on my new car. Both of these motors have a lot more longevity but I have a hard time believing 10 minutes is enough. |
10-03-2008, 02:07 PM
| | Senior Motorized Bicycle Builder | | Join Date: Aug 2008
Posts: 95
| | Re: Break-in oil
Some engineers are women, and I imagine, a few of them might even be wives.
Shudder that thought of it -- a wife who's a professional engineer....
Anyway, THEY might be the source of these old mechanical engineering wives' tales. |
10-03-2008, 02:13 PM
|  | Moderator | | Join Date: Mar 2008 Location: Tucson,Arizona
Posts: 2,957
| | Re: Break-in oil
I've used synthetic oil from day one...not to mention all my dirt bikes, quads, ect. Never had a problem with the break-in using synthetic. |
10-03-2008, 03:02 PM
|  | Master Motorized Bicycle Builder | | Join Date: Jul 2008 Location: WEST FRANKFORT, IL
Posts: 247
| | Re: Break-in oil
im ashamed to admit it but i use which ever is cheapest. tought times gotta save every penny i can actually i was sitting at a stop sign and saw a quarted stuck in the black top and i took a screw driver out of my tool bag and pryed it out
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