Engine Oils

[MaSh]

Right method to Flush engine

Hi,

I am sure, this must have been asked and answered in the previous 100 odd pages of this thread, however, since I am in office and cannot go hunting, I am asking again.

I am making a switch from Semi Synthetic to Synthetic today evening after office, probably Motul, not yet decided.

Q1. Is it required for me flush the engine?
Q2. What is the correct method to flush the engine?

Thanks,
MaSh

[abhilashabhi12]

Hi,

I am sure, this must have been asked and answered in the previous 100 odd pages of this thread, however, since I am in office and cannot go hunting, I am asking again.

I am making a switch from Semi Synthetic to Synthetic today evening after office, probably Motul, not yet decided.

Q1. Is it required for me flush the engine?
Q2. What is the correct method to flush the engine?

Thanks,
MaSh

Nope AFAIK you dont have to flush the engine if you are using synthetic or semi synthetic frm Mineral & Synthetic frm Semi synthetic.. U need to only when U get back to Mineral from Sytheitc or Semi Syhthetic..

I have directly put in Sythetic frm Mineral without any Flushing done..

[Sarvajit]

Nope AFAIK you dont have to flush the engine if you are using synthetic or semi synthetic frm Mineral & Synthetic frm Semi synthetic.. U need to only when U get back to Mineral from Sytheitc or Semi Syhthetic..

I have directly put in Sythetic frm Mineral without any Flushing done..

+1 to that. Just make sure the old engine oil is completely drained out&replace the oil filter. Don't worry about the 100 or 200ml inside the engine-it won't cause a problem. Flushing not necessary.

[MaSh]

Hi,

Thank you for the replies. Yes, not bothered about the 100-200ml, as that much oil can never be actually drained out of the engine using the drain bolt. That much of old oil will always remain inside and mix with new oil.

Regarding Mineral oil to Semi Synthetic, i guess a flush is recommended as they are of two different compounds from two different sources. Mineral oil is a natural oil and Semi synthetic is a lab made chemical.

[Sarvajit]

Hi,

Thank you for the replies. Yes, not bothered about the 100-200ml, as that much oil can never be actually drained out of the engine using the drain bolt. That much of old oil will always remain inside and mix with new oil.

Regarding Mineral oil to Semi Synthetic, i guess a flush is recommended as they are of two different compounds from two different sources. Mineral oil is a natural oil and Semi synthetic is a lab made chemical.

If you are intent on it, go for it, but it won't harm if you don't. Sometimes when fully synth oil is topped up with mineral oil also it doesn't do any harm.

[velociraptor13]

or,
If shifting from synthetic to mineral,drain of the synthetic oil,fill in a cheap mineral oil(read servo or mak) run it for a couple of km's then drain it of and fill in the intended mineral oil

[MaSh]

or,
If shifting from synthetic to mineral,drain of the synthetic oil,fill in a cheap mineral oil(read servo or mak) run it for a couple of km's then drain it of and fill in the intended mineral oil

Hmmm sounds like a good idea. The question for correct method to flush the engine arose from a scene that i witnessed a couple of days ago. I was at a chai ki dukan, which is beside a small time bike puncture and repair shop. Now this shop also sells loose engine oils. A guy came to have his bike's engine oil replaced. The mechanic drained out the old oil and then poured in about 300ml of Diesel. Yes Diesel. Started the engine and let it idle for about 5-10 seconds. Drained out the diesel which was black in color now. Mechanic said, engine is clean now. Poured in the fresh engine oil and that was it.

Now, how would this method be rated? Is this a good practice or has the mechanic gone nuts?

[Sarvajit]

Hmmm sounds like a good idea. The question for correct method to flush the engine arose from a scene that i witnessed a couple of days ago. I was at a chai ki dukan, which is beside a small time bike puncture and repair shop. Now this shop also sells loose engine oils. A guy came to have his bike's engine oil replaced. The mechanic drained out the old oil and then poured in about 300ml of Diesel. Yes Diesel. Started the engine and let it idle for about 5-10 seconds. Drained out the diesel which was black in color now. Mechanic said, engine is clean now. Poured in the fresh engine oil and that was it.

Now, how would this method be rated? Is this a good practice or has the mechanic gone nuts?

Many mechanics think diesel is very good for cleaning most things!
The direct reply to your question would be: There are different ways of cleaning the engine&this is one primitive method which cannot cause any harm in 5-10secs.Any more than that&it can cause havoc to the internals.
Tell me something, how many kms.has your bike done?
Flushing of oil is more dependent on that rather than on what oil you are using/changing to.

[arvindraju]

Hi,

Thank you for the replies. Yes, not bothered about the 100-200ml, as that much oil can never be actually drained out of the engine using the drain bolt. That much of old oil will always remain inside and mix with new oil.

Regarding Mineral oil to Semi Synthetic, i guess a flush is recommended as they are of two different compounds from two different sources. Mineral oil is a natural oil and Semi synthetic is a lab made chemical.

drain oil the when the engine is hot,remove the drain bolt,this will drain down most of the oil.you dont need a engine flush if you drain oil from a hot engine.

allow the engine to cool down & top up the new oil

[Andante]

Hmmm sounds like a good idea. The question for correct method to flush the engine arose from a scene that i witnessed a couple of days ago. I was at a chai ki dukan, which is beside a small time bike puncture and repair shop. Now this shop also sells loose engine oils. A guy came to have his bike's engine oil replaced. The mechanic drained out the old oil and then poured in about 300ml of Diesel. Yes Diesel. Started the engine and let it idle for about 5-10 seconds. Drained out the diesel which was black in color now. Mechanic said, engine is clean now. Poured in the fresh engine oil and that was it.

Now, how would this method be rated? Is this a good practice or has the mechanic gone nuts?

I would say he's gone nuts. It's like pouring water instead of oil. There's no protection from diesel while the engine is running.

Best is to just drain the oil as good as possible and replace with fresh oil. If you really think you need to flush, use proper (maybe cheap) engine oil. The little bit of oil that doesn't drain is not going to harm you.

[MaSh]

Many mechanics think diesel is very good for cleaning most things!
The direct reply to your question would be: There are different ways of cleaning the engine&this is one primitive method which cannot cause any harm in 5-10secs.Any more than that&it can cause havoc to the internals.
Tell me something, how many kms.has your bike done?
Flushing of oil is more dependent on that rather than on what oil you are using/changing to.

Hmmm primitive it maybe, it surely was scary. Had to gulp down 2 extra glasses of tea to digest it.

My bike? Mine completed 50,000kms yesterday while riding to Office. Stopped the bike on the side and took a picture of the speedo too . No, I am not planning to flush my engine, just asked the correct method, after seeing the Diesel treatment. I would just have the current Castrol 4T drained out and replaced with a Synthetic one.

[Sarvajit]

Hmmm primitive it maybe, it surely was scary. Had to gulp down 2 extra glasses of tea to digest it.

My bike? Mine completed 50,000kms yesterday while riding to Office. Stopped the bike on the side and took a picture of the speedo too . No, I am not planning to flush my engine, just asked the correct method, after seeing the Diesel treatment. I would just have the current Castrol 4T drained out and replaced with a Synthetic one.

50K kms.? Then you can consider an engine flush. Actually decarbonization also is suggested by 40K kms.but all that is dependent on your engine maintenance.
I feel in these things, follow the 'if it ain't broke don't fix it' principle!
I remember seeing some engine&carbflushing agents at a shop one day. They should be simple to use alongwith servicing. Take the opinion of an expert mechanic before going for it.

[alok urs]

hey guys thanks for all d people who insisted me to opt petronas sprinta 5000!!!!! earlier i's usin motul 5100 which was almost on the verge of destroying my engine after a long research i zeroed in petronas 5000 which is fully synthetic n cheaper dan other brands, from past one week i searched for dis bloody not so famous but a very gud oil all over bangalore wasting my fuel n time. i decided to go for motul 300v as it was d second best option but d desire to buy sprinta was still burning my heart. wen i's comin back home from my col reunion i had to drop my friend back home n on d way i jus managed to see a petronas poster outside an automobile shop, i stopped right there n asked for d same, d guy in dat shop din even knw d name of d product n he called his owner to attend me, n luckily dat owner gave me wat i wanted n told it was d last bottle he had !!! i payed 420rs but d mrp was 447! i felt like i's on top of petronas towers had to tel dis small story jus to share d pain i took to find dis oil!

n now comin t experience i had wid dis super oil! , d results were immediate , jus after fillin dis oil in d engine i cud feel a hell lot of difference in engine sound. i took it for ride n astonishingly thr wre no vibrations which wre thr while usin motul, d same day me n my frnz went for a night out n i's surprised by its performance cos i cud beat an avenger 180 wid k&n n an apache 180! v wevt for a drag for about 5kms n yeah i won it, but all of us reached a max of 120kmph. d engine is butter smooth, smoother dan a normal uni wid mineral oil in a short burst dey both took off swiftly as dey had more bhp but after 1 or 2 kms i catched dem, matched dem n beat dem

d only -ve point i noticed in dis oil is dat its heat eating ability, after racing so much d engine was on fire but dats obvious. d next day after coming from col which is only 6kms far d engine was again on fire .except dis i've no other complaint on petronas sprinta 5000 n i suggest dis oil for all uni owners who wants to try a fully synth oil

[abhilashabhi12]

hey guys thanks for all d people who insisted me to opt petronas sprinta 5000!!!!! earlier i's usin motul 5100 which was almost on the verge of destroying my engine after a long research i zeroed in petronas 5000 which is fully synthetic n cheaper dan other brands, from past one week i searched for dis bloody not so famous but a very gud oil all over bangalore wasting my fuel n time. i decided to go for motul 300v as it was d second best option but d desire to buy sprinta was still burning my heart. wen i's comin back home from my col reunion i had to drop my friend back home n on d way i jus managed to see a petronas poster outside an automobile shop, i stopped right there n asked for d same, d guy in dat shop din even knw d name of d product n he called his owner to attend me, n luckily dat owner gave me wat i wanted n told it was d last bottle he had !!! i payed 420rs but d mrp was 447! i felt like i's on top of petronas towers had to tel dis small story jus to share d pain i took to find dis oil!

n now comin t experience i had wid dis super oil! , d results were immediate , jus after fillin dis oil in d engine i cud feel a hell lot of difference in engine sound. i took it for ride n astonishingly thr wre no vibrations which wre thr while usin motul, d same day me n my frnz went for a night out n i's surprised by its performance cos i cud beat an avenger 180 wid k&n n an apache 180! v wevt for a drag for about 5kms n yeah i won it, but all of us reached a max of 120kmph. d engine is butter smooth, smoother dan a normal uni wid mineral oil in a short burst dey both took off swiftly as dey had more bhp but after 1 or 2 kms i catched dem, matched dem n beat dem

d only -ve point i noticed in dis oil is dat its heat eating ability, after racing so much d engine was on fire but dats obvious. d next day after coming from col which is only 6kms far d engine was again on fire .except dis i've no other complaint on petronas sprinta 5000 n i suggest dis oil for all uni owners who wants to try a fully synth oil

One of my frnd who has used this oil also has the same feelings.. He was using CP1R before & changed to petronas.

Everything seems normal except for the heating it seems.. he says engine gets heated too much..

[velociraptor13]

One of my frnd who has used this oil also has the same feelings.. He was using CP1R before & changed to petronas.

Everything seems normal except for the heating it seems.. he says engine gets heated too much..

The oil is damn good but the oil level gets down drastically.It seems my bike likes to drink petronas.Didn't have such trouble with mineral oils.Recently my bikes valve got stuck due the carbon deposit(my bikes done only 20000km).