Engine Oils

[B7ACKTHORN]

One more reason for engine warm up is that with metal parts warming up..they expand to fit each other better and hence performa better...without warm up riding will lead to minor and gradual damage of internal parts i guess....

ALso my 200NS manual says use choke if bike doesnt start....and then cut off choke when bike can idle easily...and when throttle response is crisp...u can ride...i dont see crisp throttle response till atleast 30 seconds of warm up

also if u have tuned ur bike for perfect AFR ratio...u are surely going to encounter cold start problem....what happens is the AFR ratio is correct for hot engine but when the engine is cold...the AFR ratio isnt perfect and becomes lean(please correct me if i am wrong...this is my understanding) and i have noticed after my bikes service that i was running rich at about 9% CO and the bike performed magnificently...no cold start problem....after service CO% set to 2%(which is perfect mixture) and i have little problems...

@ pinkai sir...i didnt know that oil pump works wrt to the engine rpm...and hence higher rpm means oil distribution quickly...this explains a lot

this link clears up doubts

There isn't an "IDEAL" AFR ratio mayank, unless it's fuel injected, where the computerized system automatically adjusts the flow to the engine. In Carbs lots come into play to setting the correct AFR. It's not gonna be 100% perfect, it depends on the place you live, hot, cold regions all have different settings.

Cheers!
VJ

[Sushrut]

Got a little query here- The manual asks the change the engine oil for my YZF-R15 V2 every 3000 km, but the service interval is 70days or 3000km whichever is earlier. Should I be changing the engine oil at every service even if there are just 1500 KM on the clock from the previous oil change?

[pixantz]

Got a little query here- The manual asks the change the engine oil for my YZF-R15 V2 every 3000 km, but the service interval is 70days or 3000km whichever is earlier. Should I be changing the engine oil at every service even if there are just 1500 KM on the clock from the previous oil change?

The SVC guys would have a better idea Technically you would not have to be changing the oil

[B7ACKTHORN]

Got a little query here- The manual asks the change the engine oil for my YZF-R15 V2 every 3000 km, but the service interval is 70days or 3000km whichever is earlier. Should I be changing the engine oil at every service even if there are just 1500 KM on the clock from the previous oil change?

It's pretty basis, you need not change the oil everytime you service. During the mentioned "service interval" 70 days just make sure the little things are taken care of, coolant, fluids, loose bolts etc. But change oil only when at the recommended KMS. Forget manual for certain instances, whereby we have to trust our bikes and instincts, which is well good than the manual, trust me.

Cheers!
VJ

[mayank.travadi]

There isn't an "IDEAL" AFR ratio mayank, unless it's fuel injected, where the computerized system automatically adjusts the flow to the engine. In Carbs lots come into play to setting the correct AFR. It's not gonna be 100% perfect, it depends on the place you live, hot, cold regions all have different settings.

Cheers!
VJ

i meant near perfect mixture in carb...i knw with change in temp and humidity and what not the AFR changes but i was talking about slight variation from perfect on a CO tuning machine.

It's pretty basis, you need not change the oil everytime you service. During the mentioned "service interval" 70 days just make sure the little things are taken care of, coolant, fluids, loose bolts etc. But change oil only when at the recommended KMS. Forget manual for certain instances, whereby we have to trust our bikes and instincts, which is well good than the manual, trust me.

Cheers!
VJ

Got a little query here- The manual asks the change the engine oil for my YZF-R15 V2 every 3000 km, but the service interval is 70days or 3000km whichever is earlier. Should I be changing the engine oil at every service even if there are just 1500 KM on the clock from the previous oil change?

how old is ur bike..if its new and hasnt even completed a good amount of kms(which is evident u are asking this query) i'd recommed change oil as frequently as possible....pinaki sir did tell this in a few posts/pages back u can check.
fresh oil frequenly given to a new engine is good

however after lets say some 5-7K kms after ur engine has perfectly set in..u sure should follow kms...and not 70 days time which is too less...basically a general approximate rule is change ur oil every 3000 kms or 4-5 months whichever early...

and there is hardly anything done in a service of a new bike...check all sortrs of stuff tighten bolts..check oil and coolant level..check the chain clean spark plugs and cleaning air filter


MY bajaj SVC doesnt even clean the air filter...my bike hasnt completed 5000kms and they say till the bike doesnt complete 5000kms they wont clean air filter..company recommends it....now even if u complete 4 services but dont complete 5000kms they will not clean the air filter...quite stupid i say....

[B7ACKTHORN]

i meant near perfect mixture in carb...i knw with change in temp and humidity and what not the AFR changes but i was talking about slight variation from perfect on a CO tuning machine.

There. You answered your question right.

..........MY bajaj SVC doesnt even clean the air filter...my bike hasnt completed 5000kms and they say till the bike doesnt complete 5000kms they wont clean air filter..company recommends it....now even if u complete 4 services but dont complete 5000kms they will not clean the air filter...quite stupid i say....

Experienced people, go to SVC only when overhauling their bikes for something mechanical, most of them don't even look at their manuals, that's one. Filters, tires, worn bulbs, fuses all comes under consumables, so if it gets worn or clogged, it doesn't mean you nee to change it at the required KMS.

But there is a certain point in time in which these parts have so called "dead time" in which they need maintenance to get back to their old working form. It doesn't really mean, you can clean your filter only at required intervals.

If you drive in a dusty and moist condition, filters tend to clog up more than usual. But a basic figure would be clean the filter every 500 KMS, give or take, which I always follow irrespective of riding conditions.

Tip about Bajaj SVC. YOu will find the outmost intelligent guy and downright, stupid mechanics, who will even argue for you with basic things which you say. Bread and butter of Bajaj SVC. But unfortunately these so called "intelligent" fellas are intelligent enough to keep them out of a gang of rugrats.


Cheers!
VJ

[psr]

A CV (Constant Vacuum/Velocity) Carburetor adjusts for the varying altitudes and so to some extent compensates for it...only a closed loop Fi can manage to compensate for all other variable parameters.....
No body had lost an engine due to frequent engine oil change, but many had lost their engines due to delayed change.....So it is better to change oil if the change is within 20 ~25% of the mandatory change interval.
The ideal AFR setting is made to give a Co rating of 1.5~2 %...

[B7ACKTHORN]

A CV (Constant Vacuum/Velocity) Carburetor adjusts for the varying altitudes and so to some extent compensates for it...only a closed loop Fi can manage to compensate for all other variable parameters.....
No body had lost an engine due to frequent engine oil change, but many had lost their engines due to delayed change.....So it is better to change oil if the change is within 20 ~25% of the mandatory change interval.
The ideal AFR setting is made to give a Co rating of 1.5~2 %...

There, mayank. psr ji, in his good old fashioned way NAILED IT!

Cheers!
VJ

[mayank.travadi]

A CV (Constant Vacuum/Velocity) Carburetor adjusts for the varying altitudes and so to some extent compensates for it...only a closed loop Fi can manage to compensate for all other variable parameters.....
No body had lost an engine due to frequent engine oil change, but many had lost their engines due to delayed change.....So it is better to change oil if the change is within 20 ~25% of the mandatory change interval.
The ideal AFR setting is made to give a Co rating of 1.5~2 %...

well the CV carb theory was new form me and quite informative thanks...

i have a question specifically for you as u have posted this same graph in many threads and explained the distribution of power based on the gas emission.

I recently went for my bikes 2nd service..i had myself tuned the carb and i felt nil vibes and good pick up..no sort of power loss ..infact it was better than ever...awesome acceleration..i had tuned it half a turn to rich....at the SVC while tuning we found out CO% was 9%

now according to this graph there is significant power loss at 9% CO

now my current tuning is at 2-2.25% CO and i dont enjoy the same pick up and acceleration and there are a few vibes(bearable and can be ignored)

now if the near perfect mix is at what my current tune is

how can u explain that at a 9% CO rich setting where there should be loss of power..i had more power and at 2% acceleration is less

at second service oil was changed from a dirty dtsi oil to a new motul 3000

now the only possible answers that i find is either the machine has errors(showing greater reading than actual) and my mixture is now lean and earlier it was a little rich

OR

the graph is not accurate

also the CO reading was taken at a opening from the exhaust pipe which is just in from of the gear box and not at the actual underbelly exhaust opening

[Sushrut]

i meant near perfect mixture in carb...i knw with change in temp and humidity and what not the AFR changes but i was talking about slight variation from perfect on a CO tuning machine.





how old is ur bike..if its new and hasnt even completed a good amount of kms(which is evident u are asking this query) i'd recommed change oil as frequently as possible....pinaki sir did tell this in a few posts/pages back u can check.
fresh oil frequenly given to a new engine is good

however after lets say some 5-7K kms after ur engine has perfectly set in..u sure should follow kms...and not 70 days time which is too less...basically a general approximate rule is change ur oil every 3000 kms or 4-5 months whichever early...

and there is hardly anything done in a service of a new bike...check all sortrs of stuff tighten bolts..check oil and coolant level..check the chain clean spark plugs and cleaning air filter

MY bajaj SVC doesnt even clean the air filter...my bike hasnt completed 5000kms and they say till the bike doesnt complete 5000kms they wont clean air filter..company recommends it....now even if u complete 4 services but dont complete 5000kms they will not clean the air filter...quite stupid i say....

I used to change oil at every service till 7000km. My bike is 11,300 km old now and I now change oil at every 3000 KM only.
Thank you all for answering my query. I have been spending lot of time worrying whether to change the oil or not. Thank you for putting an end to this confusion!

[sinnerz2000]

I walked into the kitchen today looking for food nd I saw a bottle of Mr muscle cleaner, it says it removes grease nd oil stains, can this be used on the engine between the gaps to remove the grease?

[Eshan-P180]

I walked into the kitchen today looking for food nd I saw a bottle of Mr muscle cleaner, it says it removes grease nd oil stains, can this be used on the engine between the gaps to remove the grease?

Dude marwayega...

Edible oil and Engine oil are different. Dont use it. Stains protruding from engine oil are dense and deep, your mum would scold you for finishing it. Avoid to get in trouble from home.

Remove grease and oil stains by applying WD40, its a degreaser.

[mayank.travadi]

Dude marwayega...

Edible oil and Engine oil are different. Dont use it. Stains protruding from engine oil are dense and deep, your mum would scold you for finishing it. Avoid to get in trouble from home.

Remove grease and oil stains by applying WD40, its a degreaser.

Actually i disagree
Mr. Muscle cleaner first isnt an edble oil..its a cleaner to remove stains in kitchen...i see no reason it cannot be used on the cooling fins of the engine to clean it...many use prill too...come on its just a metal and u arent putting any Mr. Muscle inside the engine..its just on the outside...and i dont see any way it would harm the internal parts...

[sinnerz2000]

Actually i disagree
Mr. Muscle cleaner first isnt an edble oil..its a cleaner to remove stains in kitchen...i see no reason it cannot be used on the cooling fins of the engine to clean it...many use prill too...come on its just a metal and u arent putting any Mr. Muscle inside the engine..its just on the outside...and i dont see any way it would harm the internal parts...

No he means that Mr muscle is used for edible oil stains

[mayank.travadi]

i suppose though being different kind of oil.....a soaps job is to remove that oil...and i am sure u can...dont u clean ur dirty hand with grease and stuff..or may be engine oil which gets on ur hand while changing oil in ur bike... with normal soap? or u go to use WD-40 to clean ur hand...? and i dont think engine fins have engine oil on it unless ur engine head is leaking....the dirt is from the road...go ahead and clean.