Topic Approved.

I'm not sure if the crankcase has sparking inside it, while running without oil, but if it does even slightly, it will be the infernous end of that engine!

One thing is for sure- engines can last better without it also, using other methods like morning warming up, proper running in, etc...

Experienced Members, please add your comments on this query...

bro at cost dont try this coz petrol doesnt even have a slight of stickyness like engine oil so literally itll be like running engine with no oil and that to flamable

Instead of petrol or kerosene, diesel can be used to flush the engine. This Diesel flush is recommended by bike expert Dilip Bam (indiabike.com). Personally I would never risk this thing.
But I guess there is no harm in doing this once especially on older bikes.

If one needs to do this kinda thing then it means s/he has not maintained it well. Just use correct oil & drain it at recommended interval. There should be no sludge.
And dont think of removing carbon deposits. It can't be removed by any fluids. If you think you may need kind of flushing job, then just get your engine opened & get it cleaned manually. If you dont want to get your engine opened yet cleaned, then use full synthetic oil or diesel oil.
Dont flush the engine. Period.
Btw, this topic has been discussed in 'Engine oil thread'.

Petrol is news to me. Though yes Diesel is pretty extensively used for this juggad cleaning!

Petrol is a big no no unless you want to bust your engine just like how Elmer Fudd blows his gun barrel in Bugs bunny cartoon. Though you can use it after you open the side case and wash the sludge. In that case you need to allow engine case to dry and then proceed with resealing.

If you are hell bent on cleaning the sludge out, then go for safer methods such as Pyroil engine flush or 3M engine flush. Read the instruction on these bottle's before proceeding, they virtually thin the existing oil as well as coat the piston during the warming process. Kerosene is safer as its ignition temperature is much higher than gasoline's but don't start your engine, you can kick the starter with ignition off (regular process done by road side mechanics). You will notice that engine will be rough for few days after you use kerosene as flush.

Again..do not try petrol for flushing.

Usage of anything other than engine oil may damage the engine. If removal of sludge and other debris is an important activity, you can use flushing oils available in some markets.

A better approach is to use mineral oil of the same grade as required by the engine and change it often over a period of 1000 km.

Best Case Scenario: You need to do nothing in case you are using some of the more advanced and modern semi-synth/fully synth engine oils. These oils have de-sludging and cleansing properties built in.

BTW..what bike do you ride and how old is it?