changing back to mineral oil from synthetic oil ??

Brian, What makes you think there would be a problem going back to minerals.

Regards...........................Jeff

thanks for your prompt reply Jeff , not saying there will be a problem , as i'm not a mechanic ; just asking the question !

There is no problem at ill in changing back.
My neighbor did this for the same reasons and all he did was to get the engine up to normal temps then simply drained it and changed the oil filter.
That was around 40K ago, and believe it or not the oil leaks have stopped as well as a reduction in oil usage however this could be the result of oil leaks taking up.
I have driven his yota many times and have not noticed any difference in performance.

There is no problem with the change from synthetic to mineral oil or vice versa as depending on the make and type of oil use it may be blended oil. Oil call “Synthetic” is probably blended E.G. Mobil Formula S 5W-30 Product Description Mobil Formula S 5W-30 is a premium semi-synthetic engine.
A “Full Synthetic” E.G. Mobil 1 0W-40 Most Advanced Performance Synthetic Engine Oil. I am involved in petro chemical supply industry and am not to try to promote one product against another more info is available on most oil companies web sites.
John C