Gas Stains on Tank and Amsoil

I have a new 400 exc and went out today. Great day, but....

A little gas leaked aout the top and dripped down the tank. It left a yellow stain on the white/clear tank. Anyone know anything that will get that crap off? Also, any one ever tried ansoil? I was think about mixing the 10w40 and 20w50 in hopes it would be about 15w 45. Thoughts? Thanks.

I have an oil service business where I go to power plants and service turbine oil. I remove particulates, water, entrained gasses, metal salts, and acids from the oil. Mixing the two oils, as you describe, will produce the results you are expecting.

Take care,


T Martin

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