I have been on the case of trying to track down GL6 oil and here is the latest position, I know some of the info may not be correct but I am interested which is which and peoples opinions of what I have been told.
I decided to contact some oil companies directly. Millers do a semi-synthetic. I may have picked the guy up wrong but he seemed to say that GL6 had only come onto the market in the last 12 months, I am now wondering about this as it is a complete contradiction to what I have been told since. They suggested a fully-synthetic GL5 would do the job which they could supply mail order (CRX-LS 75/90 BM).
The next company was Silkolene who from memory were a kind of pioneer of synthetics, they said GL6 is really redundant now as GL4sand 5s are so much better than they were a few years ago, the difference between mineral oil and synthetic they said would be due to increased pressures within the LSD, which would have made a GL6 a safer bet a few years ago however they felt a 4/5 Fully synthetic would do the job.
The guy I spoke to had used this himself in a racing car with no problems. Slightly cheaper they do a GL5 mineral oil which should also do the job.
So I am still in a bit of a quandry, I would really have liked to get something that said 'GL6' in the absence of that a fully synthetic GL5 sounds best to me but I am no Oil technician.
