Just curious - was the Rex doing, or attempting to do, it's regular (every eight weeks) automatic 10 minute test-run?couple weeks ago it failed to start
I went the other way and have been running 94 octane ethanol free petrol.TheMK wrote:after changing the fuel type (lower octane, but also from a different supplier), the problem went away.
I agree that ethanol free is the right choice. Around here "normal" unleaded is 85 octane!! I went from 91 to 88. 88 octane is technically below the spec recommended for the fuel (89AKI minimum, 91 recommended), but it runs fine still, and there doesn't seem to be a loss of power. When things warm up I'll be going back to 91 octane. I don't know how it is in Canada, but around here finding ethanol free is somewhat sporadic, and usually they don't have 91 octane. I'm lucky that driving down to the fuel distribution company's public pumps isn't too hard. They also have VP 110 octane (contains lead!) race fuel on pump, but I'm not brave enough to try that with the REx.PBNB wrote:I went the other way and have been running 94 octane ethanol free petrol.TheMK wrote:after changing the fuel type (lower octane, but also from a different supplier), the problem went away.
I have several small generators and have used this method for years. It seems that the ethanol blend gums up the fuel system at least on these little engines. I believe this occurs when the fuel sits in the system for a while.
Starting the Rex more often can keep the fuel moving and prevent buildup. I am sure that there are additives that can help as well but BMW would have to be okay with using an additive if there is a warranty to maintain. I run my Rex every other day for 20 min intervals to keep the fuel moving.
This is just my take on possibly preventing fuel system issues. I am interested to hear what others are doing to keep the Rex running smoothly.