01-06-2021, 03:12 PM
Sorry, missed all the responces.
My logic.
1. The only viable cause in my book. A leaking diaphragm does leak fuel direct into the sump.
2. Your car has a fuel pump, so should be rear tank (I see it is a Ruby so yes). to get in the engine via the manifold it has to go up hill. Gravity doesn't work like that, and I assume you don't pressurise your tank?
3. In my youth I ran a car seriously rich, yes it didn't do the bores much good, but the engine was 7/8 worn out when I started. The oil still never smelt of petrol. And the oil level went down after every use, not up.
I could see that if you crank and crank an engine with poorly set valve or ignition timing that your would flood the engine, and this would percolate into the fuel, but you would need to really crank it for a long time for this to have a significant effect on the crankcase oil level.
As noted, all this worry about ethanol is mostly bollox. Particularly on a factory seven with very little rubber in the system. A late car needs a ethanol proof pump diaphragm and that it. The big problem my american friends tell me with the ethanol fuel is that it holds moisture, so if you let your machine stand with it in for a long time, the water content causes corrosion. Particularly in the carb and fuel tank.
My logic.
1. The only viable cause in my book. A leaking diaphragm does leak fuel direct into the sump.
2. Your car has a fuel pump, so should be rear tank (I see it is a Ruby so yes). to get in the engine via the manifold it has to go up hill. Gravity doesn't work like that, and I assume you don't pressurise your tank?
3. In my youth I ran a car seriously rich, yes it didn't do the bores much good, but the engine was 7/8 worn out when I started. The oil still never smelt of petrol. And the oil level went down after every use, not up.
I could see that if you crank and crank an engine with poorly set valve or ignition timing that your would flood the engine, and this would percolate into the fuel, but you would need to really crank it for a long time for this to have a significant effect on the crankcase oil level.
As noted, all this worry about ethanol is mostly bollox. Particularly on a factory seven with very little rubber in the system. A late car needs a ethanol proof pump diaphragm and that it. The big problem my american friends tell me with the ethanol fuel is that it holds moisture, so if you let your machine stand with it in for a long time, the water content causes corrosion. Particularly in the carb and fuel tank.