What's your engine oil?

[AMMsterz]

Ok you guys'll probably be barking at me for what I'm about to reveal, having only lately read quite a bit on oil change

Ok here's how it went: My Aveo 1.4 LT Sedan has gone through around 28600 mi... The first owner had the oil changed when it had roughly 21800 mi, missing an oil change session according to Chevy Service. Since I find the service at Chevy repeatedly unbearably slow, I've decided to have the oil change today at a friend's that does high-performance tuning, mods, repairs, drift & drag shows etc. They filled the engine with Bardahl Pulsar-G 20W-50. :O I imagine their reason would be due to the availability of the oil in the shop; they handle turbo-charged cars, especially for high-level drifting purposes. Additionally, the weather here in the Philippines is year-round tropical HOT! They've also changed the filter with an Australian brand meant for a variety of cars including a range of Chevy cars like the Aveo... It says it guarantees 96% filtering power or something?

Chevy Service informed that they use 5W-30, if I remember rightly -- the same recommended in the manual... If I'm not mistaken, the manual recommended 10W-40 for hot climates. I guess the only source that could give me some comfort would be this. Accordingly, on the same level with 5W-30, 20W-30 is suitable for hot climates... I've read elsewhere that long-term usability of the oil is better and that the car should handle better under heavier loads...

So, what say you?