Hi people, I don't know if this is off-topic, apologies if it is...maybe it's 'know-how' but it's nowt to do with bikes. I topped up the oil in my car a few days ago and absent-mindedly must've got distracted and forgot to replace it. I've now lost the cap and it's been driven around the last couple of days (20miles-ish?). Simple mistake, now I'm wondering what damage I may have done to the engine. Does anyone know? Need to get a replacement (Scrapyard? e-bay?). Thanks Maz.