There's no issue switching between--or even mixing--synthetic and organic oil...with a properly maintained vehicle, that is. As synthetic MAY free up some sludge, it would be a good idea to change oil filters after about 500 miles and cut it apart to see how clogged it is. However, if you do change...

I've been running my car on Mobil1 Synthetic and changing it every 5,000 miles. Nice to hear your visual analysis is showing good viscosity up to 2x that. I have not read anything specific but I'm sure the Jiffy Lube's and oil manufacturers would prefer we change our oil more frequently so...