Dipstick is best if you're able. As grober says, use the electronic approach as a simple check - when you really should check the oil but:
I find the following are all times when the electronic check might come in handy:
- It's dark.
- It's raining.
- There's 6 inches of snow.
- There has been 6 inches of snow so the cars filthy, and you don't want to get it on your hands.
- You have a new white shirt on, and it's not an ordinary shirt, it's one of those posh ones from Marks with holes for cufflinks and everything - must remember to get some cufflinks.
- You're going out to dinner, and you've just had an argument with the other half whilst getting ready.
- You're going on holiday and forgot to do it the night before, but there is a 400 mile drive ahead of you - oh, and it's 05:00 in the morning although you intended to be gone by 04:00.
- You really are lazy and it takes all the enthusiasm you can muster to press the trip computer button.
- You've run out of kitchen towels and the other half will kill you if you use the new tea towells. Again.
- The new chrome grille you bought from a bloke in Luxembourg on ebay didn't fit right without adjusting the bonnet release catch, and you accidentally over-engineered the solution by removing it completely.
- The bloke next door is showing off by taking 4 hours to wash and check the oil and tyre pressures on his TVR. You pop out and say, "You inspired me to the same when I get back from the farm shop". When you get back you ask him to tell you all about his car, and after two minute press the trip computer button. Read the gauge and say "All done - I think my breakfast's ready".
- You promised the other half you did it properly at the weekend when she accuses you of having spent the whole time on MBClub.co.uk
Still got to much time on my hands. Maybe I should check the oil with the dipstick whilst I have the chance.