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**blade7** · 10-20-2009, 02:12 PM

Originally posted by incognito View Post

lol

ya bro I have never faced this issue as long as I was using the HH oil prolly cause the oil I have put in is 10w40 while the new zmas are suppose to have 10w30.The tank gets heated up like its been kept under the sun for a while and the best part is it doesnt always happen.

same thing happens with my bike. The HH guys are putting the HH engine oil(made by BP).

Could it really be the oil?

**HydBiker** · 10-20-2009, 02:18 PM

Originally posted by incognito View Post

lol

ya bro I have never faced this issue as long as I was using the HH oil prolly cause the oil I have put in is 10w40 while the new zmas are suppose to have 10w30.The tank gets heated up like its been kept under the sun for a while and the best part is it doesnt always happen.

Originally posted by blade7 View Post

same thing happens with my bike. The HH guys are putting the HH engine oil(made by BP).

Could it really be the oil?

It cannot be. A Fully Synth 10W40 oil does much better heat management than a mineral 10W30 oil and that too for Indian heat + traffic condition (revv, release, brake, revv, release, brake * n times) and for a 223cc air cooled engine when there is no air flowing.

**abhijeet080808** · 10-20-2009, 02:22 PM

^^ If the oil is too thick, it will have trouble flowing to all areas and thus provide insufficient cooling. Also thicker oil can increase friction and heat up the engine.

**inder.cool** · 10-20-2009, 02:24 PM

Originally posted by HydBiker View Post

It cannot be. A Fully Synth 10W40 oil does much better heat management than a mineral 10W30 oil and that too for Indian heat + traffic condition (revv, release, brake, revv, release, brake * n times) and for a 223cc air cooled engine when there is no air flowing.

+1. A fully synthetic oil is better than the mineral oil or the HH oil..! This is out of personal experience.

**HydBiker** · 10-20-2009, 02:56 PM

Originally posted by abhijeet080808 View Post

^^ If the oil is too thick, it will have trouble flowing to all areas and thus provide insufficient cooling. Also thicker oil can increase friction and heat up the engine.

That cannot hold very good when we speak about Multigrade oils.

A 10W30 and a 10W40 oil made from the same base would behave the same way in cold temperatures but the 10W40 oil retains better viscosity (than the 10W30 oil) to lubricate the engine internals at higher temperatures. In this case, at higher temperatures the 10W30 oil would not be able to stick to the metal walls as good as the 10W40 oil does, thereby reducing lubrication, reducing cooling effect, increasing friction, increasing temperature, ...

The oil grade is not an indication of its property at room temperature. For more information, there are many posts about this in the Engine oils thread. Especially the first few pages.

**prajwalkashyap** · 10-20-2009, 03:03 PM

Originally posted by HydBiker View Post

That cannot hold very good when we speak about Multigrade oils.

A 10W30 and a 10W40 oil made from the same base would behave the same way in cold temperatures but the 10W40 oil retains better viscosity (than the 10W30 oil) to lubricate the engine internals at higher temperatures. In this case, at higher temperatures the 10W30 oil would not be able to stick to the metal walls as good as the 10W40 oil does, thereby reducing lubrication, reducing cooling effect, increasing friction, increasing temperature, ...

The oil grade is not an indication of its property at room temperature. For more information, there are many posts about this in the Engine oils thread. Especially the first few pages.

A slight difference in opinion here. The xW30 would retain higher viscosity than a xW40 oil and xW40 would retain higher viscosity that xW50 at higher temperatures. xW30 would be perhaps too viscous for some engines and xW50 would be too runny for some other engines.

while the viscosity is higher, the ability to stick to the metal walls is also higher. This might be suitable for some engines, but for most engines in India, xW30 would be too thick.

Prajwal

**abhijeet080808** · 10-20-2009, 03:42 PM

Originally posted by HydBiker View Post

That cannot hold very good when we speak about Multigrade oils.

A 10W30 and a 10W40 oil made from the same base would behave the same way in cold temperatures but the 10W40 oil retains better viscosity (than the 10W30 oil) to lubricate the engine internals at higher temperatures. In this case, at higher temperatures the 10W30 oil would not be able to stick to the metal walls as good as the 10W40 oil does, thereby reducing lubrication, reducing cooling effect, increasing friction, increasing temperature, ...

The oil grade is not an indication of its property at room temperature. For more information, there are many posts about this in the Engine oils thread. Especially the first few pages.

Your point may be correct for one engine. For another engine, at operating temperature, a 10W40 may be too thick to flow properly. This can too reduce cooling efficiency. Viscous friction can reduce engine efficiency too. Got my point? Everything depends on the engine. You can never make a general statement and say that 10W40 is better than 10W30 for all Indian bikes.

Of course what you say can be true for the Zma if and only if you have practically experienced it. I do not have a Zma and am speaking theoretically.

**HydBiker** · 10-20-2009, 04:06 PM

^^^ I have copied our Engine Oil discussion to the Engine Oils thread - http://www.xbhp.com/talkies/universa...tml#post311520

Let us discuss it over there.

**Coplay@180** · 10-20-2009, 05:14 PM

One last question:
Which oil is reccomened for the ZMa then? I dont have my manual and I dont know. someone told me that the old ZMA's were recommended 20W40 and the newer ones are recommended 10W30.

mine is a 2005 make ZMA.

**rachitkdogra** · 10-20-2009, 05:55 PM

I was also very confused about engine oils for my 2006 Zma.
I tried the Fully Synthetic Petronas Sprinta 5100. Didnt Like it (Might be because at that time my bike was running very rich, Not sure). I swithed back to the HH Oil and could easily feel the bike revving more easily.

I asked the Showroom people. They are already putting the 10W30 grade oil to all Karizmas be it the new or old. I found this oil to be very decent if not the best.

**inder.cool** · 10-20-2009, 05:59 PM

Originally posted by Coplay@180 View Post

One last question:
Which oil is reccomened for the ZMa then? I dont have my manual and I dont know. someone told me that the old ZMA's were recommended 20W40 and the newer ones are recommended 10W30.

mine is a 2005 make ZMA.

Mine is also a 2005 model..and required oil specification is 10W30..!! But, now i regularly put in Petronas Sprinta 10W40 fully synthetic in my bike. It runs super smooth..no problems what so ever.

**Coplay@180** · 10-20-2009, 06:17 PM

Looks like a lot of ppl use the Petronas sprinta. Lemme try it on my ZMA this month. i think it costs around 450 now. New stock.

How long does it last?? atleast a minimum of 3.5k km's?? I heard that the idemitsu oil sold by HH for Rs 170 has a drain period of 6000km? is that true?

**inder.cool** · 10-20-2009, 06:18 PM

^ Well, i got it changed for 400 bucks..

The one from where i get it changed orders in bulk like big big barrels of that oil..!!

**kaynmantis** · 10-20-2009, 06:25 PM

Originally posted by Coplay@180 View Post

.....

.... I heard that the idemitsu oil sold by HH for Rs 170 has a drain period of 6000km? is that true?

Thats what the manual says, though Im highly skeptical about it. From my experience, it starts to loose its shine post 2k.

**inder.cool** · 10-20-2009, 06:35 PM

Originally posted by kaynmantis View Post

Thats what the manual says, though Im highly skeptical about it. From my experience, it starts to loose its shine post 2k.

6K..

That oil is a mineral oil..which lasts good only for 2 - 2.5k kms..

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