I only use the synthetic version. Too darned many seeds in that one. If you get this check engine light you'll understand.
The hardcore Brits have always used Castrol R in race engines for decades and that is castor-oil based with the most lovely smell out the exhaust. Some two stoke bike race engines were run on it for 'scrambling' (ie, motocrossing before melodramatic jumps were added) and they really smelt strongly. Gorgeous.
The whole "pumpkin spice" thing must not be a thing in the UK. Then again, I just learned a few days ago that a "fanny" is an entirely different part of the body in the UK than it is here. :eek6: CD
Yes, you can tell this site uses American-written forum software as the rude word filter wouldn't allow 'fanny' if it had been written in Britain.