YZ Freak

Jan 12, 2001
Hello everyone, I have always used spectro golden 10w40 oil (except for the break in period), in my '99 YZ 400. I have two containers of yamalube semi-synthetic 10w50 oil. I would like to use the yamalube oil up. My question is this- Would it be safe to use for one time? Is this O.K.? Thanks.
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