I'm going to impose on the forum and simply recommend my own stuff -- Chain-L. It's about as thick as possible while still allowing good penetration into the chain.

If you read reviews, you'll see consistently high ratings for it's wet weather performance. In fact, we enjoy our best sales and market share in areas with the wettest weather such as Thailand, and the Pacific northwest. Unfortunately we have no dealers (yet) in Singapore, but have sent a decent number to individuals. If it weren't for the high cost of postage, I'd offer you a free sample, but that's not possible, so I suggest you read reviews and decide if it seems worth the effort. Or you might ask on a local forum and see if anyone near you will share some with you.

I will make this offer. If you buy it and aren't happy, I'll refund the price of the oil, but not the postage.