At what mileage should i switch my japanese import car to synthetic oil?

its a 2006 suzuki grand vitara with the 2.7 litre v6At what mileage should i switch my japanese import car to synthetic oil?
You can change it whenever you like. There are a lot of old wives' tales about sytnhetic oil. Most of it is hooey perpetuated by people who don't really know about the stuff. The only real caveat concerning synthetic oil in older engines is that because the molecules comprising synthetic oil are smaller than those in conventional oil, they can fit through gaps the conventional oil cannot. This means, in an engine with very high mileage (and thus, more-worn parts with bigger clearances between them), it may burn or leak synthetic oil, but not the regular stuff. Your Grand Vitara is certainly not one of these, as I'm talking about engines with greater than 100,000 miles and the like. There are always exceptions, however, my Shelby Charger happily takes synthetic with over 160,000 miles on the odo, but a heavily abused motor may start burning synthetic oil much sooner than 100K.At what mileage should i switch my japanese import car to synthetic oil?
Listen to Harry...his explaination is exactly what I was going to say to explain ';when';...here's why...Synthetic oil lubricates the engine better than conventional oil and bonds to the engine components better than conventional oil, which provides more oil on those components on start-up. Also, I don't know of any new engine that comes with break-in oil anymore. That's a thing of the past. I would recommend changing the oil that's in it after 3,000 miles and then changing the synthetic oil every 5,000 - 6,000 miles (also, rotate the tires every oil change when on the schedule). It doesn't break down as fast as conventional oil. This is one area where you want to ignore your owner's manual...an oil change is cheap preventive maintenance.
The sooner the better. Synthetics do not work well on worn mechanical components.
Right after the break in period, ask the deal as to what the breakin period is one that vehicle, and about 300km after that period, get an oil change and switch to synthetic, but just remember, even with synthetic oil, they need to be changed at the same intervels as with regular oil. Every 5000km or 3000mi.
As soon as the break in oil is changed for the first time.

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