When I purchased my all alloy VH 2 years ago from the widow of a club member I knew, she gave me a small folder of information relating to the bike.
He was into competition singles, and amongst the notes was a comment that the bike was run on Castrol R oil.
Having eventually sorted out some incorrect details in the V5C via the DVLA (many thanks to the AOMCC club archivist), and a couple of test runs last year, I hope to use it more this year, but want to do an oil change beforehand.
However, I am not sure if the details about the oil type are correct, as I tried heating a small amount of the oil in a pan until it started to smoke, but there was no characteristic small of burnt vegetable oil. I also tried mixing a little mineral oil in, and heated the combination, but there was no obvious sign of incompatability.
Having heard reports of clumping and blocked oilways if mineral and vegetable based oils are mixed, is there any (easy) way of getting a positive identification of the existing oil type, so I can do an oil change without risking any damage to a motor that is in good order, and which I do not wish to strip down.
Would draining all the current oil and using a flushing oil a couple of times be likely to cause a problem? Ideally, I would like to swop to a mineral based oil, possibly (semi) synthetic if appropriate, for ease of availability. I have previously purchased some vegetable type oil in case I have to stick with a Castrol R type oil, but I believe Penrite sell a blend of synthetic and vegetable oil that may be of use.
I don't anticipate doing any large mileages on the bike, so any not too concerned about a bit of cam wear to the (apparently) special cam fitted.
I would welcome feedback from forum members who have experience of using both types of oil, and have swopped between oil types in the same engine.