Maybe a dumb question.But I was wondering what oil vicosity is the best for my 99'I30 T?The manual says 5W-30,but also says you can use 10W-30.What do most use here?And did the I30's come out of the factory with Synthetic or regular oil.Is there any difference between Synth and regular?My new I30 T is ready for its first oil change since I got it.

Thanks in advance

Neon

http://www.cardomain.com/id/neonnoodle

 

I have a 99 I30 and went with Mobil Tri-Synthetic 5W-30. No problems and I can actually tell it runs a bit better. Meijer's had it on sale around here for about $4.70 per quart.