I have three Stihl chainsaws that use a 50:1 oil mixture. I use non-oxygenated gas (no ethanol) and I always add one or two ounces of Sea Foam to every tank. A friend I was cutting wood with recently told me fuel additives will cause the oil to separate from the gas and ruin my chainsaw engines. That does not make sense to me but figured I could ask the people at Sea Foam. How would you respond to my friend?