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No they shouldn't be mixed as they have different viscosity
Actually, yes you can......but you are wasting your money. Mixing the two reduces, significantly, the positive effects of the synthetic oil. Only do it if you have to, but they are compatible.
There are oils available that are a synthetic blend of standard oil and synthetic oil.
What else can I help you with?
Can an old engine use synthetic oil?
No, old oil can use synthetic engines
Can you use Lucas engine oil additive with synthetic oil?
Lucas also makes a synthetic engine oil additive.. Yes.
Should you use synthetic oil in a 1936 Pontiac engine?
No, I would not recommend using synthetic in an engine this old. Use a good 10w40 conventional oil.
Can you use semi synthetic engine oil in a nissan almera?
Yes you can use a synthetic blend or 100% synthetic.
Does S60 Volvo use regular oil or synthetic?
if it's a turbo engine you should only use synthetic oil only!! if it's a non-turbo engine a conven. oil will do.
What type of oil does a 2000 mercury mountaineer use is it normal or synthetic?
According to the 2000 Mercury Mountaineer Owner Guide : Both the 4.0 liter V6 engine and the 5.0 liter V8 engine came from the factory with ( Motorcraft SAE 5W-30 engine oil ) " normal " engine oil
Can i use fully synthetic oil in a 1996 Ford Explorer 4.0 engine?
Yes. You can use synthetic oil in a 1996 Ford.
Can you use synthetic oil in a small Kolar engine?
If your engine leaks oil, no you should not use synthetic oil because it will clean sludge and can make the leak worse. If your engine does not leak oil, I would highly recomend using synthetic oil(Pennzoil Ultra 10W30 from Walmart is a good and pretty cheap choice). As long as your engine does not leak oil using synthetic oil is a great choice regardless of how old it is.
Can it hurt your engine if they put synthetic oil in it?
I use synthetic oil in my 2002 PT Cruiser, and it runs great! Synthetic costs a little more, but it actually better for your engine.
Should you use synthetic oil in your 1996 cutlass supreme?
Not if the engine is original and has more than 100,000 km on it. In that case, just use a high viscosity 20W-50 standard oil. Synthetic oil is expensive and is of no benefit in an old engine. If the engine has had a full, quality re- biuld, then use synthetic oil, and you'll get a longer life from the engine.
Why is synthetic engine oil superior and when is it recommended to be used?
Synthetic engine oil is considered better because it does not break down as fast. thus, if u use it as normal (tho its twice the cost) u almost have no probability of having too much friction inside your engine due to ur oil. Synthetic motor oil is recommended in almost every new car today. Although, most dealerships do not use it, cause it is very expensive.
What kind of oil is the best oil to use?
It is always best to use the oil recommended by your vehicle manufacture. If you are considering the difference between Synthetic oil and Conventional (pumped from the ground); if your owner's manual says to use synthetic, you need to use synthetic. But if your engine was designed around conventional, then you can upgrade to synthetic. Synthetic has advantages as being better at cleaning and protection your engine, but if you have a higher mileage vehicle, synthetic can cause leakage of the gaskets and oil seals.
