Quote:
Originally Posted by Shamrock
There is however a difference from what I have been reading. The difference being that the only 100% fully synthetic oil that mobil 1 has is the 0w40. Besides that my dealership doesn't use 5w30 for the Z's but 5w40.
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Now, I noticed your location is Israel; if you really are there, I'm not surprised your dealership is using a thicker oil due to the hotter temperatures there. Otherwise, there really isn't a good reason... people in California run 5W30... it's not a big deal.