Re: Top Speed, 80cc Chinese motor? what is the record?
The Stihl factory stuff or the ecko stuff they sell at home depot would work, I just order the opti2 from amazon.com in the quart size, they sell it in different sizes from the one gallon quick mix packs all the way up to a gallon of the oil. The quart size was appealing to me because it has the dz mix bottle that ya just squeeze the bottle to fill the little compartment and pour into the gallon gas can. A quart of this stuff lasts a long time too since the mix is 100:1.
Another option is if you got a Northern Tool in your area they sell the Vp premix in 40:1 or 50:1 by the literal and by the gallon and you can get it in those ratios as 94 octane and 98 octane if I remember right. Considering the fuel mileage these engines have it's. Still priced really good for alcohol free high octane premixed in 40:1, 50:1, and I think also 32:1 and maybe even 20:1 but the 50:1 premix should be ok for normal riding and the 40:1 for all out full throttle runs likenyou want to do.
I run mine full throttle for about a mile in each direction on my morning taco runs. The fuel I get over here is 93 octane and I mix it at 100:1, so far I hadn't seen ant reason to add more oil to the mix, but sometimes I like to add in about 1/4 ounce of castor oil to my fuel mix if I'm gonna run it hard for longer than my normal mile at full throttle. My gearing is quite low since I'm using the 44 tooth sprocket and hitting 41 to 42 mph, I still need to do the math but that's gotta be between 9500 and 10000 rpm.