I just switched over to synthetic last week. My PT had 5730 miles on her at the time.
I went on a 240+ mile trip last weekend. Fully loaded (camping gear plus two mountain bikes attached by hitch mounted Mopar bike rack), my car got about 2MPG more than my camping trip a month ago (roughly same load).
It felt like my PT coasted easier as well, but that could be a placebo effect.
I tell ya though, I can't tell if it's love for my car, or obsession. I've never had a car that I felt so strongly about that I would go out and buy all the equipment (rhino ramps, oil filter wrench, drain pan, etc.) so I could do all of my oil changes myself. In the end, I'll end up paying about $30 per oil change ($18.88 for Mobil-1 from Wally world + $10.00 for K&N oil filter), which is about $5 more than I would pay to have an oil change place put in dino oil. I'm doing it though because I've read too many good reviews of synthetic vs. dino oil for turbo engines. I want to do everything I can to make this car last forever.
Another vote for obsession is, when I had her up on the ramps and I was looking underneath I was thinking, "This would make it so easy to clean the undercarriage!". Like I don't spend enough time washing and waxing already LOL!
