Oil change!!!

My car needs an oil change soon and i have a couple of questions before i do it. I have an 02 Daewoo Lanos 1.6L. I live in Florida so the climate is pretty hot.
what type and weight of oil is good for this weather? i was recommended Havoline 10W30 , and told not to use synthetic because of the new engine, supposedly its more for older cars?
in general, will my warranty be affected if i do it myself?
and to make sure on the process,
1. open oil cap to vent
2. open oil nut on bottom of pan, drain oil into container
3. wait for 10 min or so
4. replace oil filter with new one
5. replace nut, refill oil with 4 quarts(as stated in manual)
6. take oil to disposal place
i really hate going to shops because the mechanics do not care about peoples cars, plus they try to sell you shit.

Synthetic oil are better in practicly all ways (higher heat tolerance, lower friction, stronger oil film and so on), but are more expensive. It seems like that the myths about synthetics never seems to end...

Take a look in the instruction manual an see what type of oil is recommended, both in quality and viscousity. Since it's quite hot where you live you should chose an oil which is a little thicker (the manual usually recommends several), if you chose a synthetic oil you can however go with a little thinner one since the synthetic is more tolerant to heat and the thinner oil will take less power from the engine. Then you must check that they oil you buy has passed the quality level which the manufacturer demands.

You won't void your warranty by doing it yourself but it might look bad if it isn't listed in you service book. The car will also require more service than an oil change but an extra change is always good.

The process is correct but remember to put some oil on the rubber seal on the new filter and tighten the filter and oil nut properly.

In your service manual, it should have a graph of oil viscousity temperature ranges, and which to use for your engine for your climate. SaabJohan is correct in suggesting that you use the heavier weight oil if you use a non-synthetic oil but being able to use the lower weight oil if you choose synthetic. Check your manual to be sure, but you are probably looking at 5W-30 if you use synthetic, and 10W-30 if you use non-synthetic.

There is no issue with using synthetic in your engine, synthetic oil is superior is about every way. There are even additives in the synthetic oil that make it have the same seal swelling properties as conventional oil. Synthetic oil lasts longer and is more resistant to thermal breakdown, an issue anywhere, especially in warm climates.

I know this is mostly a reiteration of what SaabJohan said, but its always reassuring to read replies that are in agreement when you are unsure of something.

ok now i cant get the oil filter off. ive only got about 3" of space anywhere around it, my filter wrenches cant get it, i dont have enough leverage to even try and turn it by hand. im turning it counter clockwise(left) and yes i have tried the opposite way. am i missing something or are there some homemade solutions i can try? this is thing feels like its stuck on with superglue. :banghead:

ok now i cant get the oil filter off. ive only got about 3" of space anywhere around it, my filter wrenches cant get it, i dont have enough leverage to even try and turn it by hand. im turning it counter clockwise(left) and yes i have tried the opposite way. am i missing something or are there some homemade solutions i can try? this is thing feels like its stuck on with superglue. :banghead:

goto advance auto or autozone....they make 'cup style' wrenches that fit on the bottom of your filter and are turned via a 3/8" ratchet, take the proper replacement filter out of the box to get proper fitment

nevermind i got it :icon16: