Yamaha YB 125Z Owners Fan Club

[boldpisces]

Can you resolve this myth that why 10w-50 is thinner than 20w-50 when both having same viscosity for maximum temperature as well as flash point?

As I said earlier that I don't want explanation. I know very well that which oil is better for YB 125z becauee I don't own a GS. No offence.

[hassantahir2]

Can you resolve this myth that why 10w-50 is thinner than 20w-50 when both having same viscosity for maximum temperature as well as flash point?

As I said earlier that I don't want explanation. I know very well that which oil is better for YB 125z becauee I don't own a GS. No offence.

Bahi this is what i am trying to explain but you just don't want to understand.......
The number with W will show how a oil will behave when cold. The other number say 40 OR 50 will decide how that oil will behave when it's hot...
Well don't bring GS YBZ war again i am fed up of that mentality already...
I am talking in general how a oil will behave.. The facts you shared above were wrong and i just shared the right ones so other people will not be misguided. I just cleared your viscosity rating concept only. A 10W-40 oil and 20W-40 oil will perform same when at operating temperature the difference between both of them would be only when you cold start the bike 10W-40 will flow easier than 20W-40 on a cold start both will have same properties at operating temperature....
you just do that finger rub test that will not tell you about proper qualities of oil you need to have a proper lab test for that....
From now on i guess so i should stay away from YBZ owner's club because some people here don't like any healthy discussion or correct facts about their rides and get angry without any reason...

[awaiz43]

Settled with shell. And I think company engineers had some good research b4 suggesting the grade for pakistan.

[boldpisces]

You're most welcome in any discussion and the point which you're trying to explain I already know. Anyway, don't get so Impassionate about engine oil. A guy above is claiming that he is getting more better results with 10w-40 even I tried that too couple of times. I know 20w-40 is thinner but it can be used in winter season. There will be no harm in it while rest of the season means summer is better to stick with 20w-50 as it will operate more secure during hot days.

[hamikhan]

Bro jo bhai 10w40 say better results hasil ker raha hay oss key waja yay hay he is using synthetic oil aor synthetic oil kay results hameesha minerals say acchay he hotay hain q k synthetic oil is made with latest tech

[awaiz43]

There is no myth init 10w oil will be thiner when its cool and will fillow more frequently as compare to 20w in cool start. And these both grades 20w50 & 10w50 will perform same when it comes to working temperatures. @hassantahir2 expalined it well.

[saboor73]

Recommanded oil for yamaha ybr is 10w-40 as per yamaha ybr service manual link below
https://www.manualslib.com/manual/612290/Yamaha-Ybr125.html?page=42#manual

[pwuser149716645359]

Btw i searched on shell webpage they also recommend 20 50 for ybz.

[naseer_jaan]

Bahi this is what i am trying to explain but you just don't want to understand....... The number with W will show how a oil will behave when cold. The other number say 40 OR 50 will decide how that oil will behave when it's hot...Well don't bring GS YBZ war again i am fed up of that mentality already... I am talking in general how a oil will behave.. The facts you shared above were wrong and i just shared the right ones so other people will not be misguided. I just cleared your viscosity rating concept only. A 10W-40 oil and 20W-40 oil will perform same when at operating temperature the difference between both of them would be only when you cold start the bike 10W-40 will flow easier than 20W-40 on a cold start both will have same properties at operating temperature....you just do that finger rub test that will not tell you about proper qualities of oil you need to have a proper lab test for that....From now on i guess so i should stay away from YBZ owner's club because some people here don't like any healthy discussion or correct facts about their rides and get angry without any reason...

bohat Achi turah samjhaya aap ne bhai jaan,
Thanks,

[naseer_jaan]

Recommanded oil for yamaha ybr is 10w-40 as per yamaha ybr service manual link belowhttps://www.manualslib.com/manual/612290/Yamaha-Ybr125.html?page=42#manual

absulutely right,
yamaha ybz mai pakistan mai 20w50 is leay recomend kiya hai yamaha ne ,Ghatya low quality engine ki waja se, Agar 10w40 istamal karain to engine ki noice zyada ho jati hai , cam ki aur connecting rod ki aawaz aati hai, mostly users ko yahi problem hai,20w50 se noice thori kum ho jati hai kyon k thik engine oil hai , company ne batter engine deny ki bajay 20w50 hi recomend kar diya hai, 20w50 pao te chalao,
Dunya ki best bikes mai santhatic engine oil istamal ho raha hai, aur yahan yamaha waly wahid aik company hai jo 20w50 minaral use karwa rehy hain,

[boldpisces]

A bike having worth of hundred thousand rupee, you think it carries a 125cc engine recommended for synthetic oil? No, it doesn't. For synthetic oil, try to install liquid engine or install a 200cc or above with air cool. You may check Indian bikes also and their recommended grades of oil for Bajaj, hero Honda, yamaha etc.

Aur 10w-40 is also a semi synthetic oil means a mixture of mineral and synthetic. Fully synthetic starts with 5w-30.

[boldpisces]

Jb yamaha ny ghatiya engine diya hy to phir oil bhi ghatiya hi use karo na. Why you're searching for synthetic or semi synthetic. Why don't you just stick with mineral oil. Perhaps, all of us love to go through different experiments and that's why you started pouring 10w-40 even I did that too.

Hence, we don't like Yamalube because of clutch slipping and performance issue so it's better to use SHELL AX3 20w-50 and I am the one who find it out and tried this oil in my YB 125z first.

[naseer_jaan]

Jb yamaha ny ghatiya engine diya hy to phir oil bhi ghatiya hi use karo na. Why you're searching for synthetic or semi synthetic. Why don't you just stick with mineral oil. Perhaps, all of us love to go through different experiments and that's why you started pouring 10w-40 even I did that too.

Hence, we don't like Yamalube because of clutch slipping and performance issue so it's better to use SHELL AX3 20w-50 and I am the one who find it out and tried this oil in my YB 125z first.

hahahhaha,
bhai mai aap se behas nai kar raha,
aap jonsa marzi oil use karo jiss se aap ki satisfaction hoti hai wo use karo,
mai ne to just apna tajziya bataya hai,
jo mehsoos kiya hai wo yahan likh diya hai,
bike k sath aur engine oil k sath tajurbaat karna meri aadat nai,
jiss cheez se mutmain hon wo share kar di ( just for user knoledge)
baki ybz purchase kar k mai yeh nai kaho ga k ybz dunya ki best bike hai,
suzuki gs150 kuch month pehly mai ne sale ki hai,
bohat claim hain gs150 k , lakin is ghatya ybz k engine se to gs150 ka engine 100 time batter hai,
Aur parts quality pakistan mai gs150 ki sub se low jani jati hai,
lakin agar ybz k turn signal aur grips aur cables quality dekho to wo gs150 se b low hai,
Not Start Fighting................................. hope you understand
jo truth hai wo bata raha hon

[boldpisces]

Thank you for sharing the manual. All I was worried about that i tried SHELL AX 3 20w-50 last time and my engine got quite silent which I didn't like at all. However, clutch wasn't slipping and gear shifting became smoother as compare to Yamalube.

Now I am planning to try SHELL AX 5 20w-40 premium mineral. Also, its API is SL while AX 3 have obsolete API SJ. Your comments will be highly appreciated in this regard. Previously, I tried Total 10w-40 and meguin 10w-40 and engine became too noisy which is again a big drawback from thin oil and I flushed out those oils immediately.

[saboor73]

Thick oil are best oil dumpers but thick oil actually doesnt reduce fricition it at just just dumps sound personally I believe "the thinner the better" (not saying that everyone should switch to oils like 0w-08 but thinest oil that manufacturer recommanded should be used) as thin oil will get in tightest of clearance and will protect engine better on cold starts as being thin it will flow better

About api grade when it comes to bikes always use "outdated" api grade oil reason is new grade oils lack "zddp" which is an anti wear for metal it was reduced to prolong life of catalytic converter of cars (which you bike lacks anyways) the reason why newer car had rollers over rocker arm is because to reduce fricition as new oils have less zddp what new grade oils have compared to older grade one is friction reducer such as "molybduem" and which are best for wet clutch so it is better to always stick to older grade oil when it comes to small bikes
There is more to all oil and engine things but I guess it is getting quite long now

[boldpisces]

Thank you for valuable input . I was keen to know better oil for YB 125z and you stretched this discussion towards car engine oils. However, you have good knowledge and information. As per my experience 10w-40 makes engine very louder on high revs and it sound like that something will be damaged inside if we keep it on high revs for long time.

Can you pls summarise your opinion that which oil we should go for? AX 3 20w-50 or AX 5 20w-40?

[saboor73]

According to shell website they sell ax3 in 20w-40 as well ax3 being api sg I would rather stick to it because api sg have more zddp than api sl

[boldpisces]

Thank you brother. Yes they have 20w-40 in AX3 too but it's good to stay with 20w-50 as I am already using this in my bike: only point is left that after pouring AX3 bike engine gets silent.

[hassantahir2]

@saboor73
Bhai koi faida nahi maatha marnay ka yahan pay.
People will still think a oil making the engine sound less is better and that will protect better myth...

[boldpisces]

But still there are few like us who thinks if engine became silent then it might be a reason that oil is not working properly and not covering whole engine means not reaching at all points.