whats the oil drain plug size? 1.50 or 1.25?

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to answer my own question it is 1.25

Just to let you know... you should be using metric tools on your G for proper fit since it's Japanese. Sometimes it doesn't matter and the SAE size socket/wrench will fit nearly as tight as the required metric one, but more times than not, the SAE one will be a little too loose and this can result in a stripped bolt.

I recommend buying a metric socket set. You can pick up a set at pretty wide-ranging set at Sears for about 30-40 bucks, or just buy a cheap set from Harbor Freight for a lot less.

Yeah, get metric sets. We all have *** cars in the family so it works out really good.