get a stihl
none
50:1. Be sure to use 2-stroke oil.
40:1
3.4 fluid ounces
Yea
It depends on the brand of trimmer you bought. Stihl, Echo, Husqvarna use 50:1, or 1 gallon of GAS to 2.6oz of 2-stroke oil Weed Eater, Poulan, and Poulan Pro use 40:1, or 1 gallon of GAS to 3.2oz of 2-stroke oil Ryobi's use 32:1, or 1 gallon of GAS to 4oz of 2-stroke oil
Pennzoil air cooled should work just fine. The specific ratio that you must use should be written on the actual weed wackier (probably on or around the gas cap.)
You will lose all lubrication to the engine, and if you run the engine long enough you will have catostrophic engine failure.
Yea
You don't use oil, you use grease
Yes, you can use any filter that fits.