Time to tell ,
@jazzy commented on my skill set the other week so I need to share .
The MOT is coming up next month for our car so I had a look at it ,changed the winter tyres for summer ones and decided to change the oil and filter -something I have done countless times .For the ones who don't know - there is a "dipstick " that tells you how much oil is in the engine - so I took out the plug and drained the oil took off the filter and changed it and then put in just less than the recommended amount of oil.
It is just as bad to have too much as too little .
Then I waited for the oil to drain into the bottom where the dipstick reads .it was well and I mean well above where it should be ,so I run the engine for 15 seconds to make sure it wasn't airlocked or something .Checked again after a few minutes to find no change ,so I suspected I had an oil filter that wasn't letting the oil pass through .
I got another from a neighbour and then needed to empty the oil out again but when I took the oil plug out no oil came out !
I had drained the gearbox oil not the engine oil so I had to borrow a car to get the gearbox oil and start again. What a clown.