Hi Guys Is it ok to use Semi Synthetic 10w 40 for my Testarossa. I topped it off a couple of days ago as it was running a bit low. However I am going to get it changed on Thursday due to my panicking. So will it be OK as long as I do not drive it till then. I also heard that Agip Sint 2000 is Semi Synthetic? My Testarossa says it needs Agip Sint 2000 10w 50. Thanks PS Should have been posted in the Technical Section however due to the English weather I wanted to get a British perspective.