I've wanted to switch to synthetic for a while but don't have the ***** to do it because some people at BITOG were getting leaks after switching. I wanted to mix about 4 quarts 5w/30 and 10w/30 Castrol GTX and a half quart of a high ester synthetic(like GC). I wanted to do this mainly for the winter. You guys see any problem with this?

 

Don't mix, its a waste, you lose any benefit you would have had running the synthetic to begin with. If you really want to run synthetics, running a dose of Auto-RX first, then switch. Otherwise save your money.

 

Do or do not, there is no mix

 

And if you have more than 100K on the engine, do two Auto-RX applications.

I switched over to synthetic oil in February, following one Auto-RX application and have no leaks, albeit I only have 64K mostly highway miles on the clock.

 

actually there are many that are mixing syn and dino on BITOG without a problem. Too scared to run full syn at 130k.

 

If you trust it, do it, but then if that is true whyd you ask?

 

good point....i like how you get straight to the point...no nonsense talk

especially this line "Do or do not, there is no mix"