Re: 2 stroke
Ammonia smell does not mean that it is spoiled. TC-W3 oils have different aromas due to the various additive packages involved. Older OMC oil had an ammonia smell. Texaco smells like tar or kerosene. Some just have a petroleum odor.<br /><br />Oil does have to be kept in airtight containers since the solvents can evaporate and change the chemistry of the oil.