I have a couple of gallons of cool power 4 cycle fuel. The bottle doesn't say what the oil content is. I bought some klotz oil to mix but don't know how much to add. I'd like to make it a 20% blend. Help and thx.

Rather than give everyone a headache, just add four ounces of oil and pray that it is compatible with the oil that Cool Power uses.

Seriously, it will work just fine as it is. Just keep the mixture a tad on the rich side, which you should be doing anyway.

I believe Coolpower 4-cycle is 15% nitro and 17% oil (it was the last time I asked them about it anyway) Regular Coolpower 15%also has 17% oil, so the 4-cycle fuel you have will probably work just fine without adding oil, just as Artisan says. But if you just have to have a full 20%, add 4.8 oz of oil. (I add 3.2 oz of Klotz BeNOL to my Coolpower, which brings it up to 19%, because it makes me feel good to do so. Not sure how my 2-cycle engines feel about it.) I believe that Klotz BeNOL, KL-100, and KL-200 will all mix with the Coolpower.

coolpower 4 cycle is 17% oil , 50/50 castor /synthetic 15% nitro.