09-07-2021, 06:41 PM
I see no reason why E10 should affect Austin Sevens. Certainly Cleveland Discol was no problem in the 60s.
It is very easy to attribute all one's woes to the latest change as happened when unleaded was introduced.
The only case I am aware of is with Citroen SMs in hot climates. It was reported to me by probably the most knowledgeable man on the marque. He is also an outstanding mechanic/engineer. It only arises because of the very high underbonnet temperatures that the cars have. The bonnet is effectively sealed for aerodynamic reasons. Driving down into the South of France his car was fine running on UK 5% petrol. After filling up with 10% it ran badly, uneven and not pulling well.
Even in this country there are problems with starting the car when hot. After a fast run of 200 miles up the A1 in very hot (for UK) weather the car wouldn't start after we had been into services. Opening the bonnet for a few minutes cured the problem
It is very easy to attribute all one's woes to the latest change as happened when unleaded was introduced.
The only case I am aware of is with Citroen SMs in hot climates. It was reported to me by probably the most knowledgeable man on the marque. He is also an outstanding mechanic/engineer. It only arises because of the very high underbonnet temperatures that the cars have. The bonnet is effectively sealed for aerodynamic reasons. Driving down into the South of France his car was fine running on UK 5% petrol. After filling up with 10% it ran badly, uneven and not pulling well.
Even in this country there are problems with starting the car when hot. After a fast run of 200 miles up the A1 in very hot (for UK) weather the car wouldn't start after we had been into services. Opening the bonnet for a few minutes cured the problem
Jim