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Old 06-12-2014, 10:47 AM
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2door 2door is offline
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Join Date: Sep 2008
Location: Littleton, Colorado
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Default Re: Finally bought opti-2

Lots of discussion here on the subject of break in using Opti-2. I and others do it and to my knowledge there have been no problems reported. Also there is no need to go heavier on the oil duing break in. I've seen some say to start with 80:1. I don't see the advantage to that.

Put some miles on the engine before you start messing with jet size. Two to three hundred is suggested then go smaller in steps keeping a close eye on spark plug color and listen for signs of a lean burn (bogging at WOT).
I personally don't rely on jet 'size' as sold. I've seen too much inconsistancy. Use the drill size, as has been discussed before. Drill sizes don't change depending on who's selling them. Jet sizes do.

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