Hey Lewis
I was recommended to use 10w 60 as the car is becuase the car is running 330lbs torque and 280 HP. But was thinking the same myself but i went with the two mechanics recomendation. Havent had a problem with the Lucus oil thats in the now seems to run smooth.
Was just going the advice given. Do you reckon the 10w 50 would suit better? Engine oil can be a bit of a mindfield.
Cheers Graham