There is mention on the forum of checking your engine oil level when cold and then there is SB168 which implies checking when hot. What is the consensus regarding this? I have a XK140
service bulletin 168 June 1955 …
engine oil level revised method of checking…XK140, Mark 7:engine
numbers B.5305-B/9999, D.1001 onwards, all engines.
On cars equipped with pressed steel sumps it is not desirable to
have the level of oil above the top mark on the dipstick when the
engine is hot and therefore oil level checks and topping up of
engine oil should be undertaken when the engine is HOT and not when
the engine is cold as has previously been our recommendation.