how long did it take you to reach 6000 miles? If you are driving with the original oil at more that 4-5 months, then i would recommend that you go ahead and change the oil. That oil has probably been in your mdx for at least a month prior to you buying it.
With regards to synthetic- I would say there is no need to go synthetic in a MDX. if you drove a s2000 or any other high performance sports car, or did alot of towing then MAYBE i would consider it. personally, i would recommend that u just make sure you change your oil every 3750-4000 miles. I guess it all depends on how long u plan to keep the vehicle. If i was planning on keeping the MDX for >125000 miles(or similarly long time period) THAN the synthetic would help. check out http://www.s2ki.com and search for motor oil recommendations. they have had similar discussions before.
regarding which synthetic is the best- MOBIL 1. the castrol is a synthetic and conventional blend. i.e. it is NOT purely synthetic. it would be cheaper to do your own oil change with 75% conventional oils and 25% mobil 1 than to use the castrol.
btw, it is highly unlikely that u can notice a difference in performance between a conventional oil and synthetic in a brand new engine.
good luck and hope this helps
With regards to synthetic- I would say there is no need to go synthetic in a MDX. if you drove a s2000 or any other high performance sports car, or did alot of towing then MAYBE i would consider it. personally, i would recommend that u just make sure you change your oil every 3750-4000 miles. I guess it all depends on how long u plan to keep the vehicle. If i was planning on keeping the MDX for >125000 miles(or similarly long time period) THAN the synthetic would help. check out http://www.s2ki.com and search for motor oil recommendations. they have had similar discussions before.
regarding which synthetic is the best- MOBIL 1. the castrol is a synthetic and conventional blend. i.e. it is NOT purely synthetic. it would be cheaper to do your own oil change with 75% conventional oils and 25% mobil 1 than to use the castrol.
btw, it is highly unlikely that u can notice a difference in performance between a conventional oil and synthetic in a brand new engine.
good luck and hope this helps