Why they say when you use synthetic oil you cant go back to regular oil?

if you cant go back what really hapends to the engine?do it worth the change?Why they say when you use synthetic oil you cant go back to regular oil?
To clear all this up,,you can go back anytime you want too,people who say you can,t are not mechanically inclined,,but who would want to go back,,the advantages of synthetic are so great that anyone using it would be down grading there vehicle ,,if they switched it back,,true it cost more,,but it,s worth every penny of it,s cost,,you will see a smoother running engine,,also a lot quieter,and maybe a small increase i your fuel mileage,,i use it in everything i own,,also in my customer,s vehicles,,and never any problem,s from it,,hope this help,s.Why they say when you use synthetic oil you cant go back to regular oil?
Thats a load of crap.


Switch...top off... if it's the correct service grade it is OK.





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Yours: Grumpy
You can go back, trust me.


You have to completely CHANGE the oil, tho, you just cant add the different oil to the crankcase on top of the original oil (synthetic or regular).


Got it?


And ya gotta change the oil filter, too, don't forget that.
Here's the correct answer. Whoever said that you can't go back to regular oil is wrong. Your engine will not suffer any bad effects from changing back to normal oil. With synthetic oil your engine may perform slightly better, because it flows more freely at high and low temps, but there is absolutely no danger to the engine by reverting to the normal formulation oil. Frankly, unless you live an an extremely hot or extremely cold climate you likey won't notice any difference; at worst you might see a minor change in gas mileage but I doubt even that. So relax.





Hope this helped.
They just want to sell more synthetic. Just like most manufacturers says use only genuine bla bla parts.
Think ! -- if Syn and Pet motor oil don't mix how do they sell, Blend.
I have gone back to regular oil after using synthetic and there has been no ill effects. However, if you go to synthetic after using regular oil, you could have oil leaks because the synthetic oil will seep through the gaskets that the regular oil did not.
synthetic motor oil is made from conventional oil. It is made to have all the same size molecules (hydrocarbon chains). when you use conventional oil, the short chains burn off first and leave the long chains in your engine, resulting in thicker oil. You know when you are way over due for an oil change and some body says your oil was really thick. Its because all the short hydrocarbon chains burnt off. You can mix synthetic and conventional. you can switch back and forth. The only problem i've found with synthetic is that the molecules are engineered to be the same size and that is ';small'; to keep the oil thin. So. it will leakk out of an existing leak faster than conventional oil. Not so much faster that its going to start pouring on the ground, but a little bit. If youare already using conventional motor oil and you have a bad leak, do not switch to synthetic till you fix your MAIN PROBLEM, THE LEAK. its like buying expensive oil and pouring it on the ground. also try bgfindashop.com


PS. nothing happens to the engine. I would use betteroils though. pennzoil had a bad reputation for causing sludge buildup. I dont know if thats still true since they are using purebase now. I still wont use it. I use valvoline, castrol, mobil, amsoil (synthetic), bg (synthetic), or mobil 1 (synthetic)