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Safest way to find out for sure is to pre-mix your fuel at 50:1 just until you get an answer at least. Go to your oil tank and make a mark at the oil level. Go out and run the engine for awhile and check the level. Your answer will be right in front of you. If the injection system is working it may smoke a little till you burn off the pre-mix, but that's not going to hurt anything. If worried, add a can of Sea Foam to the tank and it will clean up any combustion problems the extra oil MIGHT cause.
Mark