2007 Lexus Es 350 Oil Change ?

[mtbmtb01]

got a 2007 Lexus es 350 back in July. now has about 120k and want to do my first own oil change.
Car has good service record. Dealership says they were using a castrol Syn blend at 5K intervals instead of full synthetic .
Should I stick with this or switch to what ever full syn I go with what i plan to use for the g37 convertible i got the wife (mobil 1 5w30 or pennzoil ultra or platinium 5w 30) to make matters simpler and only have to keep one jug for both.
plan on using toyota factory filers.
i was also thinking about getting a set of the rhino ramps vs jack and stands.
comments?