New car leaves the factory，It is possible that no one will care about it for three to five years。So the oil in the new car’s fuel tank，Good stability，Good startup performance，It can be opened after a few years，This is the initial oil installation。

Initial oil filling due to many process procedures，High production cost。So although the shelf life is long，Stable properties，Not easy to deteriorate，But its economy is poor，Not sold on the market。Then the regular gasoline our car owners add，Is there a shelf life?？Will it deteriorate if kept for a long time?？

The answer is:Seabet

Because the density of gasoline is less than diesel、Flash point lower than diesel、More volatile than diesel，So the shelf life will be shorter than diesel，Under normal circumstances, the shelf life of gasoline is 3 months.

But there is no problem of gasoline deterioration under sealed conditions。The structure of gasoline is a complex organic chemical chain，More than 99% is carbon，Volatilizes and undergoes some chemical changes when in contact with air。SoSeal gasoline in a metal container or glass container to store it permanently，Seal in plastic container，Maximum storage 2 to 5 years。

The shelf life of diesel is generally about 12 months or even a few years，There is also a saying that diesel has no shelf life，Only if left for a long time, the combustion will be insufficient。

From the perspective of inspection and retention samples，seabet ioGeneral diesel sample retention time is 3 months，DescriptionDiesel product quality can be guaranteed for at least 3 months(in compliance with national standards).

Octane reduction、Volatilization of burning substances、Oxidation conditions and other factors directly affect the shelf life of gasoline。

If diesel is stored for a long time, the combustion rate will gradually decrease.If there are many unstable substances in the oil，Many volatile components，It goes bad easily。For example, catalytic cracking diesel does not undergo hydrogenation，The color changes in two days。So diesel also needs to be sealed and stored。

If you refuel at a regular and large gas station，It will definitely not be added to expired oil。Because China’s demand for refined oil is huge，Refined oil enters the market directly，Generally it will not be kept for more than 3 months during the sales process。

GetChina PetroleumLet’s talk，An urban gas station，Replenish oil at least twice a day，One vehicle of oil is about 20 tons。Calculating it this way，20 tons of oil，Time spent in the tank，It’s only half a day。

At the oil depot，There is a strict process for oil storage，Prevent deterioration。And the oil products are in storage、Every shipment must pass laboratory testing，Can only be released if qualified。That’s it，Refined oil flows in and out continuously，Enter sealed storage，The output will be distributed to various gas stations，Re-enter the owner’s fuel tank，Turn into driving power。

Can see，Refined oil from refining to consumption，The overall time is not long，And most of them are kept in a sealed state。Therefore，Oil from a large regular gas station，There is no possibility of expiration and spoilage。

But，Some illegal gas stations are not excluded，Will sell expired gasoline and diesel，Or use expired oil products seabet ioto blend and resell。They lure car owners with low prices，So we must have multiple minds，It is common for gas stations to offer discounts，But unreasonably low price，Be careful。

Take a look.The normal color of gasoline is light yellow or light yellow-green，Diesel is light yellow or transparent。The color is too light，Additives may be added，Increase stability。The color is too dark，It is likely to be the cause of deterioration。

Two smells.Gasoline contains aromatic hydrocarbons，Some people even find it smells good。Some brands of gasoline add MTBE (methyl tert-butyl ether，Used to increase octane number)，There will be a little sour taste，ButAt leastNo discomfort from the smell。If it smells bad，There must be something wrong。

Three touches.Petrol and diesel oil feel astringent when touched，slightly cool，Because it is volatile。If it cannot be completely evaporated after a minute or two in your hand，Be careful about what is mixed in。And gasoline feels relatively comfortable to the touch，Diesel feels smoother。

Four shakes.This method is mainly used to identify between gasoline and diesel。Shake the oil，The foam produced by gasoline usually disappears quickly，Diesel disappears slower。

The direct manifestation of adding expired gasoline and diesel is lack of power，Then the engine will run rough，It will cause blockage over time、Carbon accumulation and other situations occur，Have a direct impact on the engine。

It was found that expired gasoline and diesel were added，If there is not much fuel left in the tank，Then just drive to the gas station and fill up with fresh oil，Not a big problem。

If there is a large amount of expired oil in the tank，It is recommended to contact the 4S store，Pump out all expired oil，Clean the fuel tank oil line，Add fresh oil。

In case of breakdown on the way，The car should be turned off immediately，seabet ioDon’t start again，Tow the car to a professional repair shop，Let professionals perform maintenance，Minimize the damage。

Anyway，If the oil is not stored properly，It will deteriorate over time。So if your car has not been driven for more than 3 months，Insufficient power found when restarting，Then it may be caused by the deterioration of the oil。Similarly，If your car is planned to be left for a long time，Just keep a small amount of oil in the fuel tank。