Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Ted, I don't routinely fill up cars if not intending need for journey, also happy to run them right down to zero-ish to use fuel and refresh as convenient to general use with family travelling. We've local filling stations/supermarkets with very high turnover which may help with fuel dating and their tank storage for condition etc, don't use anything special in the way of grades to avoid E either.We've a 1991 V8 petrol with injection system that I'm running with 1% castor oil continuously since E10 has been around, no problem experienced with that and perception of no water attraction with this (I've static samples sitting in jars to assess mix effects and dropout) also don't mind carrying a can to run tank out to clear or run risky range with contingency. This one is plastic tank but system is clean as a whistle (I can get into top of tank for inspection to see if there's anything in there) but generally all good. Cap is sealed on this one with carbon filter and air/emmisions containment fitted.Perception, I'll emphasize that, is that E fuel is more stable with oil added in low ratio, castor smells nice too.
Could Castrol R be used as an alternative ?I used to put it in my Petrol back in the 1960's just for the aroma!.https://www.ebay.co.uk/itm/164815605316?chn=ps&norover=1&mkevt=1&mkrid=7101533165274578&mkcid=2&itemid=164815605316&targetid=4585169652812021&device=c&mktype=&googleloc=&poi=&campaignid=412354547&mkgroupid=1305120599331881&rlsatarget=pla-4585169652812021&abcId=9300541&merchantid=87779&msclkid=d1cc6372cf691cd57ad101aff048ae61
They used to use Castor oil in WW1 aircraft, however the fumes used to give the pilots the shits , so much so that after a lot of missions they had to hose out the cockpit. Think of people behind you sucking in all that diluted castor oil, do you really want to make them shit themselves?