Quick synthetic oil question...

[5.0 Drop Top]

It's not healty to switch back to regular or high mileage oil once you have ran 3000 miles on synthetic, correct?

 

[ECU5.0]

it doesnt matter...but i wouldnt run synthetic in a high mileage car that has any kind of oil leak

 

[5.0 Drop Top]

Roger that.

 

[Stang6911]

That statement about not being able to switch back is a huge myth! All current ILSAC/API oils are compatible with each other allowing anyone to use a synthetic oil or semi-synthetic and switch back to conventional or vice-versa without any negative performance or effects. It is also a myth that synthetic oils cause leaks. This is not true. Synthetic oils however will make previous leaks more noticeable

 

[madonionrs]

Also....
The Highmilage oil is better for cars that leak...
But when you discontinue, the leak may be worse.

Worked at a oil change place.