Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Strange Engine noise after starting - 1980's + 8

Thank you all for your replies!
Last Weekend I have done the oil change and filled in 15W40 instead of 10W40.
The first drive was horrible, because it took about 15 minutes until the strange noise disappeared, instead of 3-5 before the oil change.
But the next engine start after 24 hours was perfect, because it sounds very good as usual 