Changed the oil and filter on my 2006 Gallardo last week. The fresh fill was with Motul 8100 XS fully synthetic ( I don't know what was in the engine before ).

Noticed over the past couple of days that when the car is parked on a slope , irrespective of incline , on start up it puffs out a bit of blue smoke. Oil consumption does not appear excessive although I've only covered about 300 miles since 7th January when I bought the car.

The performance of the car is excellent acceleration/speed wise.

Anyone else have this ? Why should it smoke slightly if the car is parked on an incline ?

Is this indicative of worn valve stem seals/guides ? The car has covered 38000 miles.

how many quarts did you put in? if it's more than 10, it is probably the cause.

a little bit of blue smoke is fine as long as it goes away after 5 seconds. the oil is probably too slick. what weight did you use?

Too slick?

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lower viscosity = oil seeping through seals and then get burnt. hence blue smoke.

motul is an euro grade syn oil which is more slippery than the stock agip oil, even at the same 5w50 weight.

Wouldn't that only happen on a really high-mileage motor? Like a 100k+ mile or more? A newer motor (< 50k miles and made in the last ten years) should be ok with 5w or even 0w with no leaks due to startup viscosity, right?

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-Smoky
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Nope. Earlier G engines are built with looser tolerances and thus burn oil. A puff of blue at start up is normal for pre 09 cars.
Unfortunately, the car only "looks like a 100,000 mile junker" starting up :O

Overfill will make this worse.

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I put back 9.5 litres of oil at change.

The grade of the Motul is 5-40.

As mentioned the performance of the car is excellent and the puff of blue smoke appears only on starting , and not every time.

One other thing, it has effectively a straight through exhaust with cat by pass pipes. I have noticed that the exhaust tips are a dirty mid brown colour . Is this normal ?

I would not worry about the start up smoke. Next time, I would use a different oil brand.

As for the brown soot, it could be due to the smoke or your straight thru exhaust. An oil change typically will make less soot.