Below are some of the posts which have very good information related to engine oils suited to Karizma from one of the most knowledgeable members here, pay attention to the parts which are in bold.
So you can first switch to a 20W40 Mineral oil (which costs much less than synthetic, about 250 rupees for all). Keep checking the oil color/oil often (its a great habit if you can check oil level everyday!). It might last you more than 2500km too if you're not a ripper kind of guy. Just check the oil color and see if it has become too dark/black compared to the original color which would be brown/green, and when it has turned black, also check whether the oil is a bit gritty to the touch (make sure your hands are clean before touching the dip-stick!). Have a look after the oil change to know how original oil looks like.
If you find the gears to be really notchy and are making life difficult after the oil change (pun intended
), then you can try switching to a fully synthetic 20W40 grade oil (ex: Motul 20W40 fully synthetic) on your next oil change - though some would suggest that there wont be much change. I personally don't know if Synthetic 20W40 has smoother gear shifts compared to Mineral 20W40. Anyway for starters, try finding Motul 3000 4 T mineral - its supposed to be the best among all 20W40 mineral oils, and should cost you ~250 rupees. If you cant find it, try getting Gulf 4T pride plus Jaso MA2 or any other variants mentioned above.
Another reason to stick to mineral, is that you get a can of mineral oil for ~200 rupees which can last anywhere between 200-3000 kilometers, where as can of good synthetic oil for about ~800 rupees and is supposed to last for about 6000 kilometers. Mineral will last 2000km even in harsh conditions (according to experience of many members here), but I wouldn't trust keeping the same oil (read synthetic) for a really long time even if the manufacturer/someone says so. So would definitely change sooner than that. And if I am on mineral, I can change oil 4 times in same distance/money bracket.
Again this opinion originally came not from me, but from experienced members here, like psr and others, who have tried different things and have come to this conclusion. HH Service center people might try to scare you off saying higher grade oil eats your machine or some conjured nonsense, but this bike and these oils have been around for a while, and have been tested by enthusiasts looking for better performance, stability and reliability. So go ahead with the change without doubts.
PS: PSR, I hope you don't mind me quoting so many of your posts, without asking you. I'm still a newbie, so cant trust my own words.



). Recently sorted out the idle RPM issue, now it is at ~1k when cold. Didn't know that it is so easy to set
I have two bicycles myself, and ride the ZMA only if I am pressed for time and the distance is on the higher side. I cycle to office (23km one way, so 46 kms ride on 0bhp(?) on that day

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