Synthetic blend oil consists of MUCH more conventional oil that synthetic oil.. I think the % of synthetic oil in this mix is never more than 10% with the other 90% being conventional oil.


Basically the "blended" oil is made and sold to yield a larger profit for the makers of the oil.. Since they are charging much more for it, but it is mostly made with regular conventional oil.

Don't quote me on this, but I THINK that even when using the synthetic blend oil, it is reccomended to still do an oil change every 3k or 3 months. What does that tell you? It's far from synthetic..

You should be fine switching to FULL synthetic oil. Many makes use full synthetic as a factory fill. I don't see why there would be a problem there.