Oil change - will this cause issues?

[Slaninar]

I think any experienced mechanic will tell you that they can not tell what oil is, or has been in an engine, but they can usually tell you if it has been changed frequently or or not.

Put simply, if you let the oil wear out, it will not protect you and damage will occur. Quality oil will wear out slower then cheap oil, but if you  change the oil before it wears out, then you stay protected so it doesn't matter which you use. If you want to be able to change less frequently, then use quality oil.

For all I know, changing oil too often is also harmful - not as much as changing too late, but far from optimal.

Aren't fully synthetic oils less likely to cause sludge build up inside the engine?