Engine Oils

[shoeb2015]

sometime back even i was thinking of finding a site that sells bike oils.. But couldnt.
If you are not sure about purity of engine oil.. Use oils sold at
a. petrol pumps
b. at authorised service centres for bikes.. Yamalube 20w40 is as good as 20w40 from mobil..
c. at an authorised oil dealer.

Motul ?

Guys, this weekend I had been to Pune for attending the Indian Superbike festival; the total trip was around 320kms (Mumbai-Pune-Mumbai). So, yesterday while I was doing a regular check-up, I found the engine oil smelling slightly of petrol and it had lost almost 30-40% of its viscosity. So my question is, what is causing my engine oil to smell of petrol and lose its viscosity??

Just my thought here-
It could be that the air-fuel mixture is getting past through the piston rings during compression stroke and getting dissolved in engine oil.
But that should evaporate as petrol is volatile,Nahi ?
(Experts please correct me)

Also make sure that the smell is indeed from the oil and not from the petrol tank leaking petrol vapors.

[hunkofgals]

yes you can.
No, it wont void or even affect your warranty but dont tell anyone that you're using different oil.
& congo for the bike..
Btw, its 15w50 not 20w50

oops sorry my mistake
can u say me what all oils are available at that rating ?

[Honda_CBF]

oops sorry my mistake
can u say me what all oils are available at that rating ?

only mineral oil which works damn good is motul 3100 (in 15w50 & 20w50 both). Ok kind of mineral oil is mak 20w50. (it performs like bajaj oil)
Semi-synth are
motul 5100 (15w50)
valvoline premium 4t (20w50)
veedol super swift 20w50.
That's the list I know of.
Btw, you can use search function for these kind of infos

[muztariq]

Motul ?

no i intend to write mobil only..
Mobil Super 4T 10W-30, 10W-40, 15W-40, 20W-40, 15W-50 and 20W-50

i am using this oil and finding it similar to yamalube 20w40

the pics of the oil bottle are on post 4912

https://www.xbhp.com/talkies/universal-threads/4789-engine-oils-492.html

so, if someone is finding it difficult to source a genuine mobil or a castrol all he should do is go to a yamaha authorised service centre and get a yamalube. Similarly for honda or pulsar dtsi oils etc. etc.

[Pinaki]

Guys, this weekend I had been to Pune for attending the Indian Superbike festival; the total trip was around 320kms (Mumbai-Pune-Mumbai). So, yesterday while I was doing a regular check-up, I found the engine oil smelling slightly of petrol and it had lost almost 30-40% of its viscosity. So my question is, what is causing my engine oil to smell of petrol and lose its viscosity??

This is a very dangerous condition . Immediately drain the oil and leave the drain nut & oil-check plug open for a night . Refill with correct grade oil for your purpose . I guess you have been running a lighter oil than required for the long ride in this summer ? If it repeats even with the correct grade of oil , contact service and have your engine checked throughly.

... so, if someone is finding it difficult to source a genuine mobil or a castrol all he should do is go to a yamaha authorised service centre and get a yamalube ...

Yes , I do that when the supply of other oils here get scarce sometimes . Yamalube is available in many useful grades and types(mineral/Semi & full synthetic) too and genuine is guaranteed at yamaha parts counters and Yamalubes are really great oils . Only drawback with this method is that yamalube costs a little more than equivalent oils from motul/gulf/shell etc simply because they(yamaha) won't let you bargain .

only mineral oil which works damn good is motul 3100 (in 15w50 & 20w50 both)...

[hunkofgals]

only mineral oil which works damn good is motul 3100 (in 15w50 & 20w50 both). Ok kind of mineral oil is mak 20w50. (it performs like bajaj oil)
Semi-synth are
motul 5100 (15w50)
valvoline premium 4t (20w50)
veedol super swift 20w50.
That's the list I know of.
Btw, you can use search function for these kind of infos

.
it recommends 20w50 oil
so shall i try directly for SS or FS during 1st servicing ?
or shall i use the one which KTM gets as default ?

[muztariq]

.
it recommends 20w50 oil
so shall i try directly for SS or FS during 1st servicing ?
or shall i use the one which KTM gets as default ?

ktm was recommending motul 7100 single ester fullyS oil afaik.. You can get whatever oil you want after first service but do not downgrade from a recommendation of ss or fs oil to mineral oil to save money..

@pinakiji - was missing you in action.. Welcome back.

[Honda_CBF]

ktm was recommending motul 7100 single ester fullyS oil afaik.. You can get whatever oil you want after first service but do not downgrade from a recommendation of ss or fs oil to mineral oil to save money..

@pinakiji - was missing you in action.. Welcome back.

100% agreed.
@ hunkofgals,
i'd say use any ss oil for now, till 10k kms at least but not the bajaj one

[hunkofgals]

100% agreed.
@ hunkofgals,
i'd say use any ss oil for now, till 10k kms at least but not the bajaj one

ok i wont degrade to mineral again dont worry once i use SS or FS i wont come back to mineral
.
oh so which SS oil shall i go for now?
any suggestions ?

[rossifumi46]

during long running at high temperatures, an air cooled bike develops some hot and some cold areas, if these cold areas are capable to cause angular distorsion of the cylinder, the oil starts going into the combustion chamber(most of the times) from the area where piston rings are not able to drag the oil back.. But sometimes fuel starts going into the oil chamber and there is decrease in oil viscosity.. When fuel is mixed with low combustible materials like kerosene or diesel this phenomenon is more prominant.
If you are confident it was just a temporary distorsion due to overheating and not because of adulterated fuel, just go for engine oil change(immediately, dont start the bike with petrol in oil). Otherwise change both the oil and fuel.. If the problem continues at low speeds also, piston rinhs are the problem.

My Post 13556, point 8b is what you may be suffering:
www.xbhp.com/talkies/motorcycle-ownership-experiences/5370-yamaha-fz-16-a-1356.html

Hi muztariq thanks for your suggestion but I own a Yamaha R15 Version 2.0 so, my bike is liquid cooled and not air cooled. Could you please elaborate about adulterated fuel, and not starting the bike with petrol in oil.
Thanks.

[Honda_CBF]

oh so which SS oil shall i go for now?
any suggestions ?

motul 5100 is superb & is the costliest. Price is slightly under 500 bucks. Valvoline premium is also very good, i bought it at Rs.310 one month ago. Another benchmark oil is sprinta (sprinta 5000 i guess) though hard to source.
Go with any of them you'll be more than satisfied.

[hunkofgals]

motul 5100 is superb & is the costliest. Price is slightly under 500 bucks. Valvoline premium is also very good, i bought it at Rs.310 one month ago. Another benchmark oil is sprinta (sprinta 5000 i guess) though hard to source.
Go with any of them you'll be more than satisfied.

ok il go for motul 5100
as my bike needs 1.4 lts so i gotta buy two bottles
so it might cost nearly 1200 or so !

[muztariq]

Hi muztariq thanks for your suggestion but I own a Yamaha R15 Version 2.0 so, my bike is liquid cooled and not air cooled. Could you please elaborate about adulterated fuel, and not starting the bike with petrol in oil.
Thanks.

cylinder distorsion happens even on coolant cooled cars.. So it can happen on r15 or any other bike.. Though, if its just coz of hot and cold points in engine then chances of it happening on air cooled engine is much more than a corresponding liquid cooled one.
Cylinder distorsion has many other reasons.. There is numerous literature available online. Thermal differences in engine honing process and actual running process is one..

Regarding adulterated fuel.. If you have cylinder distorsion, whether temporary or permanent, fast burning fuels like petrol will cause less problem then adulterated fuels like diesel or kerosene, as these unburnt fuel will remain even when the piston moves up in the combustion cycle, this residual fuel will dissolve in oil if the cylinder is distorted or it will burn off in the next ignition cycle.
Regarding running the bike with petrol in oil.. First your oil has lost all its power to protect as it is diluted with a much less viscous fluid. Secondly why you want to take chances of taking the petrol mixed oil to 100 deg celcius? while the autoignition temp of petrol is much higher but it is still dangerous to turn on the ignition in the situation you are in.


Have you seen the presentation on pulsar 200ns. Just ask why it come with three spark plugs.. Actually in every combustion cycle there are pockets in cylinder in which the spark fails to ignite fuel. If you identify these places by electronic probes and place a spark near them when required, it will burn off that unburnt fuel and will save petrol as well as improve performance. In your case the unburnt fuel area was colder than other area and may have caused temporary cylinder distorsion or worse there may be manufacturing defect..

[111diablo111]

how is shell advance ax7,if anyone's using it??

[Honda_CBF]

how is shell advance ax7,if anyone's using it??

used it once, long ago. Its a good oil pretty much comparable to power1, but doesn't last long. For my bike it would have performed well till around 2k kms max in winter.