quote:Originally posted by Piper:rolf,have you thought about cooking the canola for a while to remove the gums? i think that virgin oils that have been used in engines goes through some processing to make it safe.piper
quote:quote:I would not be surprised if the 'air' in and engine short block - i.e. what is below the sealing piston rings and above the oil in the sump - were pretty oxygen-deprivedafter all, it is a sealed environment It is actually not a sealed enviornment...but blowby gasses may tend to push atmospheric O2 from the crankcase. These gasses are lower in O2 but not devoid of it. I believe that most VO will polymerize in this environment fairly quickly...however the are two possibilities that I can see may ameliorate this tendency.1. Fresh VO may have high levels of anti oxidation compounds in it which can help prevent polymerization. VO intended for use as crankcase oil may have even higher levels of these compounds added. It may be possible to add additional anti oxidation compounds between oil changes as the original ones are used up.2.If the engine is using lots of crankcase oil the additions of fresh VO to make up for this loss may add enough fresh anti oxidants to prevent rapid polymerization. One thing to consider is that polymerization is only one of the problems associated with use of VO as crankcase oil.It also presents the likelyhood of acellerated ring/land coking.Dana
quote:I would not be surprised if the 'air' in and engine short block - i.e. what is below the sealing piston rings and above the oil in the sump - were pretty oxygen-deprivedafter all, it is a sealed environment
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