- Apr 12, 2010
It is generally not advisable to run a rich oil to fuel mixture and can decrease performance by foiling up the plug reducing firing potential. If your spark plug is a nice chocolate brown color that means you have a good mix if it is darker, too rich, lighter, too lean.Just out of curiosity, could you use 16:1 all the time? Would this make it more reliable, or make the engine last longer? Would it make it slower, or is it just expensive?