FYI
The major german classic car magacine had an big article on this issue.
Here are the facts:
1. They found out that rust problems are more common now in the old cars.
2. The reason ist: the gas was reformulated a view years ago.
They blend now alcohol into the gas wich is prone to cumulate water.
3. Not only that, they found agressive bacteria
in tanks of oldtimer that are not often driven.
In modern daily drivers with plastic tanks this is not a problem.
4. They state that the only cure is a good tank coating and a special gas additive when you don`t drive the truck - let`s say - during the winter.
Frank
