[Laird Scooby]

Thanks Andy - can see i've got a lot of reading to do!

I've no doubt the engines are well engineered, it seems however that simply by using the wrong oil (perhaps in an emergency situation or simply picking the wrong one of a shelf full of correct containers) that the engine could soon be history, simply through lack of knowledge on the owners/drivers part.

To me, that doesn't make sense when the oils are outwardly very similar, just with different specs.