I have been told by different people to swith to fully synthetic at different milages. After 700 miles I replaced to conventional oil with with semi synthetic. Now when do i switch to fully synthetic? I have heard the next oil change and i have also heard keep using semi synthetic until 6000 miles? Also for central california climate (30-60F) degrees winter hot summer and mostly at low altitude except when i Tahoe, what weight oil should i be using? RIght now I am using 10w-30
thanks mike

 

Read some of Claudius' post... especially the one on breaking in the EVO engine. I think it is generally after the first thousand miles that you switch to fully synthetic.

 

I have allways done dinosor oil for the first start up and first 100 miles or so till the rings seat and the motor no longre smokes the right to modern sin oil the sooner the better