Steve
Unleaded nozzles are smaller than leaded or diesel - so it's quite possible.
As for damage from leaded - bad news for a cat, and I believe one tankful can do a lot of damage, but if the nozzle fitted then there's a chance Growler's motor isn't cat equipped. Depends on local regulations in the Phillipines.
Yes, lead (as tetra ethyl lead) improved octane ratings, so allowing higher compression, improved efficiency etc. Good few down sides though. Did you think that the deposits you got in engines were carbon? Actually they resulted from the leaded petrol. That's one reason why decoking and valve grinding have virtually disappeared from the motoring horizon.
Regards
John
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Yes it's a US-made full Ford import as churned out from Kansas City with no concessions to the local environment, so it has a cat, plus now 120 liters of leaded! The nozzles here all seem the same size (just that they're colored yellow - leaded, silver - unleaded and paradoxically green for diesel, the guy had no trouble getting the nozzle in the tank filler. The leaded is 85 octane and the unleaded 93 octane (Caltex). But there aren't any emission regs here regarding cats and stuff so maybe it doesn't matter. Thank you everyone. I hope I don't turn out to be the text book example in the database next time someone else has the same problem. The cat underneath looks awfully big....
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It seems to my memory that decoking was a dead letter long before unleaded. There were lead deposits, very good for valve seats, hence grief when leaded disappeared.
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But lead isn't lead any more is it? It may be in Growler-land of course, but I think it's disallowed here. UK 4-star has benzene and other additives that are more noxious than lead, but there you go. Funnily enough, our vehicles go about the same distance on the same monetary amount of either...
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