CConsuegra, there’s really nothing wrong with “necroposting” as long as you are adding new, accurate and on-topic information to the thread. Which you seem to be wanting to do. Unfortunately, if push came to shove, I would classify this as necroposting because sugar in a gas tank is generally off topic. It might have been mentioned in the thread and it might have been mis-information, but it is not a “fuel additive” and not a large part of the conversation so doesn’t really have much to do with the topic at hand.
But don’t let the reaction spoil your impression of the forum, please. Honestly, Robin was trying to do a service by informing, not to chastise just to chastise. Unfortunately, we do get a lot of necroposting around here and rarely because the person has anything new or informative to add.
If you do stick around, welcome to the forum. Please feel free post and reply. But if you reply in an older thread please make sure it is new, informative and on-topic. If you’re not sure please feel free to send a PM to ask someone or just start a new topic starting a new discussion. (If the Moderators feel it is closely related to an older topic it will be merged onto that topic, no harm done.) Thank you. 