Synthetic Oil

[metload1]

Hey,

Is it true that once you put synthetic oil in your car, you can never put regular back into it? Even when getting your oil changed?

Thanks!

[hadboosttroy]

total myth

[gmblack3a]

Originally Posted by hadboosttroy

total myth

I agree 110%.

[RP-350Z]

Yup yup it's a myth.

[John Styrnol]

I totally agree, but once you start using Synthetic you won't go back, LOL

[RTexasF]

Agreed.... That is a pantsload.

[FalconGuy]

bobistheoilguy.com

Like this forum, but for oil.........

[jdoria]

I believe there are more myths:

Synthetic is so slick, it will go through your piston rings if you use it after 3000 miles.


You cant use synthetic if you have used regular oil for longer than the break-in period.


A 60k+ mile engine will die with synthetic in it.


There are a lot of stories. I use only Mobil 1 and have for 15+ years. Good or not, I feel good. I have cases of it in my garage, I bring it to my oil changes. Along with Sunoco 94 octane fuel. For the few extra bucks, who cares!

[victory]

I'm a die hard Amsoil user. Every fluid that needs changing gets changed with Amsoil.

[TnM6i]

Yup, it's a myth. Have you ever noticed "Synthetic Blend" oils on the shelf with the dino and synthetic stuff? If they can mix it in a bottle, there's no reason why changing back and forth in the engine would harm anything.

[Tenebris1]

It's a myth, although I wouldn't be switching back and forth. I've been using Lubro Moly and then Elf synthetics in my turbo Volvo for over a decade and she has always been running great. Regular changes are still key, I usually do so well before it's recommended (6000 kms on average).

[another qx4]

yup those are myths. at rx7club some of us believe that we shouldnt run synthetic oils in rotary engines but the truth is that you should never run craptastic synthetic oils, so its ok if you go for the big brands like Mobile 1.