Why some two stroke petrol engines need to mix oil in it?
Why some of two stroke petrol engines need to mix oil in it. and some of won't. i drive 2 stroke Yamaha RX 135 with petrol as fuel. but it aint require oil to mix within it.
I know the whole orientation of 2 stroke and 4 stroke is different as there is no sperate provision of oil sump in 2 stroke as that of 4 stroke engines.
I guess its good purified petrol itself is self lubricated that it will carry out its performance at desired level .so no need of extra adding of oil is necessary in 2 stroke engines.
But its not same for all bikes and scooters(old ones).
Well modern bikes and scooters r 4 stroke now so this question is only for old bikes lover.
I know the whole orientation of 2 stroke and 4 stroke is different as there is no sperate provision of oil sump in 2 stroke as that of 4 stroke engines.
I guess its good purified petrol itself is self lubricated that it will carry out its performance at desired level .so no need of extra adding of oil is necessary in 2 stroke engines.
But its not same for all bikes and scooters(old ones).
Well modern bikes and scooters r 4 stroke now so this question is only for old bikes lover.
Replies
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Shashank MogheWikipedia says:
"Unlike four-stroke engine whose crankcase is closed except for its Crankcase Ventilation System, Two Stroke Engine use the crankcase as part of the Forced Induction tract, and therefore, oil must be mixed with Gasoline to be distributed throughout the engine for Lubrication.Two Stroke Oil Cite Note 1 The resultant mix is referred to as Petroil.Two Stroke Oil Cite Note 2 This oil is ultimately burned along with the fuel as a Total Loss Oiling System. This results in increased Exhaust Gas, sometimes with greyish-blue smoke and/or a distinctive odor."
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