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I'm puzzled where some people are getting the idea that synthetics should not be used in a new engine until it is "broken in". Porsche, Corvette, and some other very high-priced, high performance makers use it right off the assembly line, brand new! Are their engineers wrong? - hardly. You can start using the synthetic anytime now. Mobil suggest the 5W30 grade for newer engines. And use a decent oil filter - ie: NOT a Fram. Get a Purolator, or a "NAPA Gold" - or a Mann from one of the advertisers on the banners on this Board.
If you go to the Mobil 1 website you'll find that they are candid about the need for their product in cases where you do not have severe or unusual driving conditions, and where you change your oil frequently - they advise that you DON'T need a synthetic. Given your intent to change every 5000km, you are probably wasting money. Go to 10 or even 15,000km and the Mobil 1 starts to make economic sense. Also less waste oil and filters being put into the environment. Of course if you are doing mainly short trips and in cold weather - ignore the above extended change suggestion.
I use Mobil 1 in all my vehicles, (2 motorcycles and 4 family cars). Not cheap, but I stretch the oil changes WAY out.
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