polymerisation
Just a short note on what can happen to the engone oil when running on veg oil. It happened to me, took a rebuild to get the jelly out of my engine!!!!
ALL diesel engines have a certain amount of fuel to engine oil contamination to a greater or lesser extent dependant upon many things, pre-combustion chambered engines tend to suffer less than direct injection engines. This is why, on any diesel, when engine oil is changed it immediately appears black again, this is soot / carbon deposits amongst other contaminates. When diesel contaminates engine oil it thins it out then most evaporates, when veg oil contaminates it thickens due to polymerisation and there is no evaporation. When engines are started from cold on SVO or a mix this ingress can be greatly accelerated. If you find that the dipstick level is rising the sump is filling up, it is a sure sign that your engine oil is being contaminated with veg oil, if left unchecked an overfull sump can cause damage. A simple test for polymerisation is to dip then get sample oil between thumb and forefinger, if it is sticky, CHANGE THE OIL, with converted engines in good condition this does not usually happen until normal service mileage is due, if at all. With converted engines we recommend engine oil changes every 5000 to 6000 miles, a good mineral based oil or semi synthetic oil is ok for some engines but a high spec plant based engine oil such as Plantomot 5w40 is even better as these oils resist polymerization well, conserve energy and are biodegradable. We advise use of these oils especially on higher powered engines and direct injection types. In extreme cases where the engine has gone way over its service interval and/or engine is not in good repair the engine oil can turn to sludge. BE WARNED.
