G'Day mate,
It can do, depends on a few things, have you just added some to top up, what sort did you add. Mixing mineral oils with synthetics can sometimes upset things, reduce the effectiveness of the oil, give you clutch slippage problems, make the engine run noisy,
bring about (worst case if its totally the wrong oil) premature failure engine component failure.
If in
doubt, for what new oil is worth, i would just
drop it and replace with fresh oil. I like to use
Activ-4T-Motorbike-Oil-15W-50-4-Litre.aspx?pid=20019#details">Castrol Activ 4t in my older motorcycles. If you are in a cold climate, you may go to a 10/40 oil. Operating temperature is often a decider.
Happy to talk to you further about your repairs. I have much experience in this field:) A testimonial and rating is a great reward for my advice to you is greatly appreciated. It makes helpijng out worthwhile and gives me a warm fuzzy feeling. Hope you get things sorted easily. Cheers mate
regards
robotek
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