Q: Cleaning two-stroke and four-stroke engines

asked by on

Please explain 2-stroke and 4-stroke engine in reference to fuel cleaners in your car.

2-stroke engines don’t have an oil sump. There is no actual oil in the engine to lubricate it. So you have to mix oil with gasoline. Usually, it is in a 40:1 ratio, with 40 parts gasoline and one part oil. Then when the gasoline gets inside of the car, it’s oily. So it gets on the metal parts and lubricates them. So, the cleaner made for 2-stroke engine has to be a very strong cleaner that works with burning, when the engine oil and gasolines mix.

A 4-stroke engine, on the other hand, has the oil is in a sump and is pumped through the engine to lubricate it. So the gasoline is pure gasoline and there is no oil mixed with it. So, the oil and the gas are not supposed to mix in the engine like that. So they need different kind of cleaner.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Cleaning two-stroke and four-stroke engines

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: my question is can a rear main seal leak spray oil up into the engine compartment on top of the valve cover area on passenger sid?

It may be possible since the oil can run down the oil pan and then get into the belts and slug up the passenger side of the motor. This is not as likely as the front of the engine crankshaft...

Q: How do I safely clean my car's throttle body?

The best way to clean a throttle body is to use throttle body cleaner with a soft towel to wipe out the carbon deposits on the throttle body. In order to do this, I would recommend having someone help you...

Q: Engine turns over good but won't start what might be the problem? It misfired one time and hasn't started since.

Your engine requires spark, air, and fuel to start and run properly. Air is almost always present so that leaves spark and fuel. Depending on the vehicle, if a crankshaft sensor is faulty, the engine control unit may not receive...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...