A petrol (gas) question

[tinboatcapt_imp]

Flynrider warns that leaded gas (avgas) harms catalytic converters and o2 sensors.
Stichill points out that it is illegal to use untaxed avgas on the roads.

It is true to both counts: it is illegal to use avgas on the road, and it does contain some TEL. For the shop we used a very small amount in the tank just to keep the tank and system 'wet'. That small amount would be highly diluted when the tank was filled with taxed, government approved petrol. The fuel is 'low lead' and not as heavily laden as the leaded gas of the 60's.

The small amount was sufficient as the bikes were stored inside heated space so condensation was not a problem. They all fired right up when needed in the spring.

I don't suggest that you regularly run the bike on anything but what can be dispensed from a station pump. Sorry about the confusion. One low mileage tank fill, at the start of the season isn't critical.
jim

Actually, it's called 100LL (low lead) because it has less TEL than the green 100/135 avgas sold in the 60s and 70s (primarily for huge supercharged radial airliner engines). The TEL content of 100LL is about 10 times the amount found in the old leaded regular auto fuel.

I agree that heavily diluted and not used as a regular fuel, it's unlikely to damage exhaust components. I only posted as a warning to those who might try filling up their tank with 100LL avgas as a storage strategy.

Actually, it's called 100LL (low lead) because it has less TEL than the green 100/135 avgas sold in the 60s and 70s (primarily for huge supercharged radial airliner engines). The TEL content of 100LL is about 10 times the amount found in the old leaded regular auto fuel.

I agree that heavily diluted and not used as a regular fuel, it's unlikely to damage exhaust components. I only posted as a warning to those who might try filling up their tank with 100LL avgas as a storage strategy.
Interesting. My chemistry is polymers, and it's ancient knowledge.
jim