This post is very loosely motoring related. After Creosoting my garage a couple of years ago, I found out that the formula for Creosote has changed and it has been renamed Creosote substitute. Basically, in comparison to the original tar based product, the modern stuff is carp. It didn't even last a year. My question/query is, would it be wise to make up say, a 50 : 50 mix of old engine oil to the new substitute, in the hope that it would act more like the original and seep into the wood and protect it a little (a lot) better than the modern stuff? I imagine the old oil would also kill off any fungi/mould? I'm very tempted to try it but, a little worried that the oil, while initially giving better protection, might, damage the wood and effectively destroy the garage. Any help/suggestions from the chemical knowledgeable vantage point/inclined, would be appreciated. Thanks!