[speediva]

I use full syn, but I slowly got my car adapted to it. I did 2 oil changes with the syn blend before changing fully over to the synthetic.

I tend to do a lot of city driving, and I was told that the cost for the syn is worth it to protect the engine better in city conditions. Could be I'm just dumb and believed it, but I do like the way "Sophie" ran when I finally changed over to full syn. Not to mention that I can get an easy 4000 miles out of the synthetic blend for only about $2 more per liter.