what is the main cause for gasoline getting into your oil?
473616
Worn piston rings is usually the culprit. Lower combustion chamber pressure results in incomplete combustion as well as the worn rings allowing blowby into the crankcase. Worn valve guides can contribute to this as well. I'd say it was time for an overhaul or exchange.
162289
My dad in Australia has converted his car to run on Liquid Petroleum Gas. It has halved his costs every time he fills his tank. See the link below for more info.
466572
--------------------------------------------------------------------------------\n\nFirst, gasoline is not a simple chemical compound like water or ethanol. It is a mixture of hundreds of different compounds. The reason for this is that gasoline is made from crude oil. Crude oil, or petroleum, is made up of thousands of different compounds, and the exact compounds present and their relative amounts differ depending on where the petroleum is produced. (For example, oil produced in West Texas differs remarkably from oil produced in the Middle East.) After the oil is produced (or taken out of the ground via oil wells), it is shipped to an oil refinery, where it is separated into different products, including gasoline, jet fuel, and diesel fuel, among others. \n\n\nThe separation of the oil takes place in a process called distillation. (Note that there are other processes which occur in a refinery as well, but the simplification to consider just distillation is not too far off.) In distillation, the oil is heated until it starts to boil. Some of the thousands of chemical compounds that make up the oil start to boil at low temperatures, and some do not boil until the petroleum has been heated up to higher temperatures. The different products (such as gasoline) that come out of a refinery are defined by their boiling temperatures during distillation. The lightest compounds (those that boil at the lowest temperature) become aviation gasoline, the next lightest become automotive gasoline, the next lightest become lightweight solvents and so on. In order of increasing boiling point, some other categories of refinery products are jet fuel, kerosene, diesel fuel, lubricants, greases, and asphalt. Gasoline is typically made from the fraction of the crude oil that boils at temperatures between about 50 degrees Celsius and 200 degrees Celsius. \n\n\nSo, we can't say for sure exactly what compounds are present in gasoline, but we can define gasoline to some extent. First, it is made up almost entirely of hydrocarbons, which are molecules made up of carbon and hydrogen. (Some of the compounds present in gasoline also contain small amounts of other elements, including sulfur, nitrogen, oxygen, and some trace metals.) Next, those hydrocarbons which make up most of gasoline boil at temperatures between about 50 and 200 degrees Celsius (120 to 400 degrees Fahrenheit). This means that these compounds are mostly those hydrocarbons that have between 6 and 12 carbon atoms in each molecule. A good average is probably octane, which has eight carbon atoms and 18 hydrogen atoms and is written C8H18. \n\n\nsource:http://www.madsci.org/posts/archives/apr2001/987004809.Ch.r.html
236674
I would recommend you just put a trickle charger on the battery, change all the fluids, put some stabilizer in the gas, and leave it stored until you need it, by what your doing, you are causing more harm then good, if the oil doesn't get up to temp, it slowly collects moisture (not good) and not only that, since the oil doesn't get up to temp, the engine gets more wear.
668402
This is what I found when I googled- freezing point of gasoline\n\nWell, gasoline should freeze if you get it cold enough! Gasoline does not consist of a single kind of molecule -- it contains several different hydrocarbons (molecules consisting of hydrogen and carbon atoms). In principle, if you cool a mixture like this slowly enough, it will form a collection of different types of frozen crystals, with the freezing of each type of crystal occurring over a (different) range of temperatures. In practice, often such mixtures don't form crystals at all but just gradually thicken and harden as they get colder, forming something like glass- hard but without the regular crystal that make a true solid so different from a liquid. In a glass, on a small scale the molecules are still jumbled up like in a liquid.\n\nThe problem of fuel getting gummy and solidifying is more of a worry with aviation fuel. High-flying airplanes fly through very cold air (every time I fly and they show the outside temperature, it's -80 F!). And one of the last things you want to happen to an airplane is for the fuel pipe to freeze up. People add stuff to aviation fuel to keep this from happening. Piston-powered propeller planes sometimes have isopropyl alcohol or other compounds added to prevent freezing.
790585
Leaded and unleaded gasoline, not oil. Before technology got around to major improvements in fuel and metallurgy lead was added to gasoline to coat the valves of an internal combustion engine to prevent pitting and lengthen the life of the engine or the duration between rebuilds. Lead usage in fuel was made illegal in the US because of the poisoness effects of breathing air with leaded emission fumes and of the cumulative effects of the leaded soot that collected near streets and highways. Now valves are made of harder, more durable metals and fuels burn cooler and have newer, less toxic additive to prevent pitting and "ping"
1026768
gasoline burning engines
297839
gasoline is a volatile liquid, meaning it can evaporate at lower temperatures. these fumes are easily detectable by their smell at a gas station. but its not easy for a person to understand when the air has formed a combustible mixture with the gas fumes. if oxygen and gasoline fumes are present in adequate amounts even a small spark can ignite the air around you. this leads to spontaneous combustion. even using cellphones is unadvisable at gas stations because tiny sparks can be produced at the battery terminals.
801621
Gasoline is a mild skin, eye, and respiratory tract irritant. Ingestion of gasoline causes mild to severe irritation to the gastrointestinal mucosa; chemical pneumonitis is often severe. Systemic effects of gasoline exposure are mainly a result of CNS depression. \nSystemic effects can occur from all routes of exposure. Exposure to low concentrations may produce flushing of the face, staggering gait, slurred speech, and mental confusion. Higher concentrations may result in unconsciousness, coma, and possible death due to respiratory failure. \nGasoline vapors sensitize the myocardium which may result in ventricular fibrillation. Delayed effects may include hemorrhage of the pancreas and fatty degeneration of the liver and of the proximal convoluted tubules and glomeruli of the kidneys. \nAcute Exposure\nMost adverse health effects from acute exposure to gasoline are caused by the hydrocarbon component. However, persons who have repeated or massive exposure (e.g., inhalation abuse, prolonged skin contact) to leaded gasoline may develop lead poisoning (lead is no longer added to gasoline in the United States). Immediate effects of exposure to gasoline are primarily due to pulmonary injury and CNS depression. Other systemic effects may develop over several hours. Components of gasoline probably crosses the placenta and may be excreted in breast milk.\n\nChildren do not always respond to chemicals in the same way that adults do. Different protocols for managing their care may be needed.\n\nCNS\nAcute gasoline exposure can cause transient CNS excitation followed by CNS depression. Confusion, giddiness, nausea, headache, blurred vision, dizziness, and weakness can occur. In massive exposures, rapid CNS depression, respiratory depression, seizures, loss of consciousness, coma, and death have been reported. \n\nRespiratory\nGasoline can irritate the mucous membranes of the respiratory tract. Pulmonary congestion, edema, acute exudative tracheobronchitis, and intrapulmonary hemorrhage have been reported in severe exposures. Pulmonary aspiration of ingested gasoline may cause pneumonitis.\n\nExposure to certain chemicals can lead to Reactive Airway Dysfunction Syndrome (RADS), a chemically- or irritant-induced type of asthma.\n\nChildren may be more vulnerable because of relatively increased minute ventilation per kg and failure to evacuate an area promptly when exposed.\n\nHydrocarbon pneumonitis may be a problem in children.\n\nCardiovascular\nGasoline vapors sensitize the myocardium to circulating epinephrine which may cause potentially fatal ventricular fibrillation.\n\nRenal\nInhalation of massive amounts of gasoline may result in fatty degeneration of the proximal convoluted tubules and glomeruli and renal failure. Ingestion of gasoline has been reported to cause oliguria, tubular necrosis, interstitial edema, hematuria, reduced creatinine clearance and elevated serum creatinine, elevated urinary protein, glucose, and hemoglobin, and elevated BUN.\n\nGastrointestinal\nDamage to the digestive tract following ingestion of gasoline may include severe esophagitis, gastritis, degeneration of the epithelium, and mucositis of the oral cavity.\n\nDermal\nGasoline vapors can cause inflammation of the skin. Prolonged contact with liquid gasoline causes significant irritation (i.e., irritant contact dermatitis), degreasing, and burns. Redness and blisters may occur.\n\nOcular\nEye irritation from gasoline vapors begins at about 200 ppm. Inflammation is generally slight. When splashed in the eye, gasoline may cause burning pain and transient corneal injury. Chronic exposure to gasoline may cause damage to the cornea, retina, and ciliary body.\n\nPotential Sequelae\nAcute hydrocarbon-induced CNS depression generally is completely reversible after exposure ceases unless the episode has been complicated by lack of oxygen. Acute renal toxicity may persist for several weeks following ingestion of gasoline, but usually resolves with treatment. Chro
668488
Unleaded fuels-so no lead\nnitrogen compounds come as a result of air combustion in your engine (remember air is approx. 80% Nitrogen).  and you gotta have air to make your engine run.\nSulfur gases can also be a result of this combustion if there is high sulfur content in the fuel. (Shell had a problem with this last year)\nPS. Don't buy into the greenhouse hype, at this point there is NO real evidence either way that fuel combustion makes any difference in the grand scheme of climate dynamics
355813
Maybe you should have the emissions checked.  Drive it to the EPA and have them check it out.
747477
drain your gas tank or you will mess up your engine
501149
I think the refineries, when the run the oil through a cracker, can determine how much to pull off as gasoline and how much to turn in to other things. Refineries actually make more money on light end hydrocarbons which are sold to the petrochemical industry to make all sorts of things, even plastics.
88472
The role of ethanol in gasoline/petrol is that of improving the "research octane number" and thus giving a more efficient burn. Removing the ethanol from the fuel will give rise to the phenomenom of engine knocking and a very inefficent energy transfer ratio.\nzun_noon answer is correct in that there is no ethanol in gasoline/petrol, but it can be used as a fuel additive.  Ethanol is not essentially beer but is found in beer as ethanol is a pure alcohol and you wouldnt want this in your beer.
1000716
The oil is usually within a layer of porous material. Imagine a bucket full of marbles and water. You can get the water out of the bucket without disturbing the marbles much at all.
230507
This is a common urban myth that high schoolers love to threaten each other with. From the little research I did on the web I say it is a lie. Due to the fact that sugar is not readily soluble in gasoline it would do nothing more than clog the filter sock on the fuel pump and possibly the fuel filter. If sugar did make it to the engine it would probably do nothing more than a little sand would do once making it that far. I have never had to drop a tank and clean it out because of sugar contamination. I am not sure about sugars solubiltiy in ethyl alcohol (ethanol) though so I may be wrong on this one. Anyways If you really wanted to inconvenience someone just put water in their tank it would be a lot easier to do and a lot harder to detect. Also they would probably just blame it on the gas station.
63453
No! There is no natural dirt in an engine. The reason oil gets dirty in an engine and has to be replaced is, over time while driving your vehicle, dirt gets sucked into the motor and the air filter can not stop it all from going into the motor, and it accumulates in the oil.That is why your motor oil gets dirty for the most part.The oil filter is also not able to trap all of the dirt. Another reason to change it is, over time the lubricating qualities get broken down and it is not able to keep the engine poperly lubed.