engine oil after top end rebuild - Honda CBR250R Forum : Honda CBR 250 Forums
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post #1 of 6 Old 04-14-2017, 10:21 PM Thread Starter
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engine oil after top end rebuild

just finished my top end rebuild and wonder if motul semi synthetic is ok to use or should I use honda GN4 engine oil. thanks
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post #2 of 6 Old 04-14-2017, 11:24 PM
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Dino oil is the best for a quick break in, but any wet clutch approved oil is fine.

I'd use Rotella diesel oil for the first 500 miles, then run Rotella syn-blend or Delo.

Tis better to be thought a fool and remain silent, than to open one's mouth and remove all doubt.
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post #3 of 6 Old 04-15-2017, 07:00 AM Thread Starter
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I checked online at canadian tire and walmart but no Dino oil and no rotella NON-synthetic oil. selection not so great in Canada even in greater Toronto area but will go and check in person this morning
I have motul semi-synthetic oil already, would the semi-synthetic oil be ok to break in the new piston rings?
or should just buy the GN4 from honda if i cant pickup the other oil? thanks
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post #4 of 6 Old 04-15-2017, 05:51 PM
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"Dino oil" is slang for conventional oil. I would just stick with Honda GN4.

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post #5 of 6 Old 04-15-2017, 07:04 PM
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Plenty of oils out there comparable to GN4 that are a lot cheaper and much more widely available. I usually get Spectro or Motul from my local bike shop, mainly because I want to support them and help make sure they stay in business. I've also used the cheapest Valvoline 4-stroke oil from Walmart for a season. It met all of the same requirements as GN4 and worked fine. I see little reason to travel 20 miles round trip just to pay a premium for GN4 from the nearest Honda dealership when I can get perfectly fine oil a lot cheaper right up the street and help out a local business in the process.
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post #6 of 6 Old 04-18-2017, 02:51 PM
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You can put a 10w-30 auto oil in the bike as long as it doesn't say "Energy Conserving" on the bottle. Once you've put a couple hundred miles on it then your break-in is over; drain the 10w-30 out and replace with your motul semi-synthetic and you'll be golden.

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