Motor Oil for GS 150 R

I went for MOTUL 5100 ESTER 15W-50 for my GS-150R, it's semi synthetic!

does anyone has any say on it?

I dont think anyone has used 5100 in GS, atleast no one from xbhp if i'm not mistaken.
So you'll have to give us a review about the oil.

w50 isn't the right grade but since its summer i guess its ok.

You can adjust with additional 8 mm box and 17 mm box/socket spanners and a piece of iron pipe to use as a lever with our stock spanners. But buying 8 mm box spanner and 10, 12, 17, 22 and 27 mm socket spanners and lever is more convenient. 12, 17, 22 and 27 mm spanners are needed to remove the front and rear wheels.

I wonder how the bike was running with a broken (gear) shaft. Anyhow, I too am happy to hear that your bike is OK.

You can use semi-synthetic oil but using W50 is not advisable because it is thicker, I think. It is better to use W40 semi-synthetic or if you are ready to spend more money for nothing better, fully synthetic.

Even I asked Suzuki Engineer the same... what he meant was a crack in shaft...Had that SC service manager told be about this shaft and change in gears and subsequent run-in of a new engine...I would have seen things from a different perspective. but anyways ...my GS is fine and i'm enjoying it.
One silly doubt...Suzuki engr. has advised me to ride my bike for around 1500km like run-in of a new engine. so far i have covered 850km. will a rebuilt engine take so much time to set all the parts correctly?
As 2nd service is due next week, I was planning to get it done this weekend and change oil & oil filter, just like we do with a new engine. Is that ok or should I run-in the engine for another 200-300km and then change the oil?
There is light hammering sound at idle in my bike from engine. idle is set at 1500rpm. Is this normal with GS engine? I have completely forgotten the way my GS's engine used to sound when it was new. I don't get to check any other GS which has run similar to my bike (i.e. 2-3000 km) at SC.

Hi Guys,
I'm back home for Vishu Holidays.

There are some minor problems regarding my baby GS that I am worried about.

Firstly the disc brakes appear to have lost its bite. It surely brings down speed but the lever action has increased.
Also, after installing the pilot lamp LED's by connecting them with rear licence plate light circuit, it has been noted that the battery is getting drained faster.
It is impossible to use ES, and the console goes blank if I try it.
Can it be due to faulty wiring ???

Also can you guys please verify the service schedule regarding battery recharging and brake shoe replacement???

Thanks in advance

For the brake problem, replace the brake fluid, disc brake piston and cup set which costs around Rs. 200/- plus service charges. At the same time, check the brake pads too. There is no fixed interval to change the brake shoe or pad. That depends the usage.
Your battery seems to have drained fully. It may be due to the short distance rides, where the it does not get properly recharged. Now, get it recharged or if needed, replace. After that, revert to the original electric connections. Remember to buy a MF battery if replacement is needed.
Happy Vishu to all the Keralite GS owners.

AFAIK, weight of 15W-50 is about 3mg/ltr more compared to 20w-40 grade oil. I'm not sure how it affects Engine and clutch lubing . Its got be the Viscosity and other properties of constituents of the Oil.


Cons noticed:
- Idle RPM after Cold start touches 1100 !!! earlier it was 1300/1400


Pros noticed:
- Riding gets smoother after engine warms up.
- Earlier, gear shifting(up) after 60 min city ride was difficult, now it's smooth(butter, never thought it could be this smooth).
- Earlier, riding was flying now it's surfing the ground. I find later more comforting. Guess, this oil really sticks well to engine parts!
- Immense noise reduction!!

Suzuki recommends 20w-40(Mineral, SS, FS as situation demands) grade Oils. 15w-50 is also in the list of substitutes.

It's claimed that 15w-50 grade oils can't retain the original oil properties for longer duration; grades like 20w-40 retain much better.

I can only comment on 15w-50 SS after running on it for another 1000 kms. I'm planning for a 300 kms long haul soon.

Thicker the oil is stress for the engine

example thats the reason grandma used to add water to the idly batter while the grinder struggles with the thick batter

we used to opt of SS or FS to make bike perform better in terms of smoothness and better handling, but with a thicker oil do you think that full fills the above requirement

am not stopping you this is just my view

If thicker Oil stresses engine a lot why come up with the make in the first place? When to go for thicker oils then?

Reading this post [http://**********.in/engine-oils/] now!!

Batter example was good

By design, cc and etc.... some bikes needs thicker oil

Some 150cc bikes are going with 10W - 30 where others are with 20W- 40.

Because of the low level cold viscosity rating synthetic and semi synth help better in cold climatic condition.

Per the normal indian climatic condition the company recommended grade is okay, if you are in some place like desert where the day temperature is extreme high and in the same day night temperature also goes too cold that's where we need the 5 W 50 or 10 W 50 type oils

Moreover companies like suzuki or bajaj spends lot of money in developing the bike where as they did lot of research and concluded the oil grade suitable for engine.

in testing phase manufacturers used to continually run the engine for days where the used oil grade is the recommended one not a higher grade, am telling this because in a continues 2 days run just assume the heat generated by the engine.

Another good example overhauling the engine and for some core level engine resetting ( read asd bore and piston setting) mechanics used to run the engine with full oil in oil reservoir for hours, so as to make the engine to get set. For which they used the normal recommended engine oil only.

One who can't learn if he feels he knows all, am still a learner and want someone to correct me if I was wrong

I am also in favor of using w40/w50 based on the environmental temps and frequency n duration of bike usage.....

In south especially during summers the temps are too hot almost 38 to 40c, bumper to bumper traffic...so w50 is way better than w 40 and further more going for long ride also requires w50......because bike will be at high temps for most of the time....hence only w50 can have better tolerance

The uncorn manual also confirms the same though our gs did not mention it but suggests w 50 as one of the option....

Unicorn Monetary Value & Other Questions... - Page 2 - Team-BHP

Hello Everybody,

I am back after a long pause. I read the posts here some bitter some sweet.
some good quotes "Love your bike and it will love you back".
Liked the long post on page 1057 by Mach50, Good job buddy! That made me feel proud of my choice for not choosing Dazzler on GS.

Its been 6-7 months and bike has done ~5k on Odo. From the day my bike's carburettor and tank got replaced, I am very happy with the bike...

Now the monster is giving me 57 +-2 kmpl, no rusting on new tank, no sound from the front.... all problems solved (touch wood).

One thing worth mentioning is that I am really impressed by the after sales services of the Suzuki. The person who attended me after my complaint on the official site, called me after two weak when my problem was solved to take the feedback... Awesome! It shows they are concerned about their customers a lot.