Bingo!

By the way ,I just want to say that when I write a long winded account of something I rarely read it over so forgive my spelling mistakes. I know I should read it over but I cant abide it ,never could even when I was at school. Anyhow some good news to report. One of the reasons for buying a Sun Voyager was the fact that it had a Cummins 6 cylinder engine. I have loved these engines for years,had them fitted in barges and generators, even got a 4 cylinder version with 4 hours on it in my shed .Part of my lifetime junk collection. Back to the RV. I always had a plan to get this engine running on a fifty per cent mix of recycled veg oil.Being pre 95 it has no emission controls or engine management system,in fact nothing complicated. So two months ago I brewed my first batch and added it to the fuel tank.1000 miles later she continues to run happily on it .I have not changed the fuel filters but carry a spare. I dont expect to have any problems and the filter will be changed prior to the new season as normal.The performance is unchanged and the smell is not unpleasant. Starts right up from cold immediately.To me this is fantastic as I was sure it would work and I am happy that it is now doing so. As the veg oil is free it means I am now getting the equivalent of 30mpg costwise. whoopee! next experiment will be to add water to the equation????????