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Old 7th October 2016, 18:06   #46
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Default Re: Motorcycle Engine Oil Article. Must read!

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Originally Posted by abhinav.s View Post
If I may, which Motul oil are you using? The 5100? If the manual recommends oil change interval at 2000kms, then I feel you are better off doing that than trying to source an oil to increase the drain interval.
Thanks. I am using Motul 5100 15W50 (Semi-Synth). (Yamaha recommends 20W40)

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Originally Posted by a4anurag View Post
I maintained an interval of either 2000 kms and 6 months whichever is earlier.
Thanks. I used to follow the same - this is the first time I have exceeded 2000 kms ( but not 6 months - change the oil once before the onset of monsoon : by June and once in winter by end November; new oil + cold Pune air = sweet sounding engine )

So guess that larger kms (or longer drain interval) does affect the performance.
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Old 15th November 2016, 18:42   #47
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Default Re: Motorcycle Engine Oil Article. Must read!

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Originally Posted by vrprabhu View Post
Sorry to bump an old thread.

Can you please share the oil change interval which you have been following?

I have been using Motul (Yamaha Gladiator) and find that within 3000 kms the shifting becomes rough (the manual recommends 2000 kms oil change, BTW)
I am surprised, have an RTR and an Apache 150. With synthetic oils the the drain interval is usually 5K+ kms and the max I have pushed is around 7.5K kms on a motul 300v and petronas sprinta. Both the times the mech who changed the oil confirmed that the oil still had life for another 1K kms. And mind you do like to rev my engines hard, the bikes used to see 8k rpms atleast a few times a day.

I make it a point to change the oil when the bike is warm, use a fresh filter and use an oil flush every alternate oil change.

I would suggest before changing your oil to have your clutch cable adjusted to see if your gearshift smoothens . Also have physical examination of the oil and try to study how bad it is.
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Old 7th February 2017, 19:06   #48
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Default Re: Motorcycle Engine Oil Article. Must read!

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Originally Posted by abhinav.s View Post
Air cooled engines, in general in vast majority of cases cannot fully exploit the benefits provided by a fully synthetic oil. These are better suited to Liquid cooled engines.
Can you please explain why it's not recommended for air-cooled engines?
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Old 7th February 2017, 19:44   #49
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Default Re: Motorcycle Engine Oil Article. Must read!

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Originally Posted by mithun View Post
Can you please explain why it's not recommended for air-cooled engines?
I did not mean to say they are not recommended. I meant to say that the air cooled engines cannot fully extract the benefit of the fully synthetic oils. Air cooled engines wear out the oil faster than their liquid cooled counter parts. Hence the oil change interval recommended by the OEM will be quicker on air cooled bikes.
In case you do want to go for fully synthetic oil, sticking to the OEM recommended grade for all seasons may not work well and you would have to change the grade based on ambient temperatures. The drain interval would be extended by a short duration and not a lot on air cooled motorcycles.
Considering the cost to benefit ratio, it is better to use Semi-Synthetic oils on air cooled motorcycles. But if you can work out the correct grade for the current ambient temperatures, you certainly can use fully synthetic oils as well. My point of comparison for this is limited to the TVS RTR 180 on which I have used both fully synthetic and mineral oil versus the Duke 200 on which it is always been fully synthetic as the service center would not stock or fill up mineral oil at all.
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Old 13th February 2017, 11:24   #50
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Default Re: Motorcycle Engine Oil Article. Must read!

Synthetics or Semi-synthetics both are great for air-cooled or liquid cooled small displacement engines. I ran my Duke 200 (liquid cooled) with Shell Advance Semi-synth (10W40) changing it every 4k-5k kms. without any issues and never did the engine run excessively hot...similarly I have been using synthetics in my Activas (10W30) and the oil stays sticky for thousands of kms (approx 6-7k sometimes even more)...it looks burnt but maintains it's viscosity
Idea is to replace the oil at regular intervals. Also, using 10W50 or higher grades actually makes the engine work harder to overcome internal resistance from these thicker oils. A synthetic lighter oil will flow better and flow faster hence your engine actually cools faster...!

Regards
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