Capra
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Does this have to be done at full operating temps? Why did MB opt for this method?
I should have checked the manual, thanks Wighty.My users manual says check the level hot after being parked for a few mins . I like the dipstick level to be at 3/4 above minimum (but that's me)
Strange Wighty....I was unaware that the engine oil needed to be hot when it's being checked.......thats complete new's to me ( but then again, you learn something new every day !!! LOL,) But like you though,I'm happy enough with the level sitting 3/4 above the min, and cold at that...must check it hot, and see how it looks then. Is your's the OM651 engine too?My users manual says check the level hot after being parked for a few mins . I like the dipstick level to be at 3/4 above minimum (but that's me)
Strange Wighty....I was unaware that the engine oil needed to be hot when it's being checked.......thats complete new's to me ( but then again, you learn something new every day !!! LOL,) But like you though,I'm happy enough with the level sitting 3/4 above the min, and cold at that...must check it hot, and see how it looks then. Is your's the OM651 engine too?
I want to begin with D) , and finish with I bet it's over max when hotStrange Wighty....I was unaware that the engine oil needed to be hot when it's being checked.......thats complete new's to me ( but then again, you learn something new every day !!! LOL,) But like you though,I'm happy enough with the level sitting 3/4 above the min, and cold at that...must check it hot, and see how it looks then. Is your's the OM651 engine too?
That is why I asked the question? Sounds odd, but maybe other manufacturer do the same? Or maybe something to do with such a large quantity of oil, but that would indicate that a fluid takes more room when hot?Whats the point of them calibrating it hot? As i understand, you have to wait for it all to drain back after driving so that leaves a small window and variances...why wouldnt they make the marks like everything else and assume its checked cold. I check all levels when convenient to me i.e when i have timeand its cold and parked level, not 20 mins after a long journey when thats the last thing i want to do. Surely everyone else does the same?
It doesn't matter whether hot or cold, ....
Whats the point of them calibrating it hot? As i understand, you have to wait for it all to drain back after driving so that leaves a small window and variances...why wouldnt they make the marks like everything else and assume its checked cold. I check all levels when convenient to me i.e when i have timeand its cold and parked level, not 20 mins after a long journey when thats the last thing i want to do. Surely everyone else does the same?
thats about where mine was this am. cold .but 4mm down when i finished the job yest. i was brought up with the whole idea of knowing the level is correct BEFORE turning the key , not 20 min later and potentially somewhat to late ! another thing i like to watch for is any unknown increase in level , like diesel getting in the oil for example .I check hot +10 mins on my OM651... which currently reads 1/4 above max... erm... thats for another thread.
Does this have to be done at full operating temps? Why did MB opt for this method?
I was told by a top techy at Mobil, that you must check it at full operating temp if you use Mobil 1 0W40, as it really expands. So to ensure you don't overfill check when red hot.
Apparently if its too full it can beat it into a frothy constituency. Which has a bigger volume , sort of a vicious circle getting worse and worse. And the frothy oil doesn't protect bearings properly.
Hmm I thought that all seemed a bit exaggerated. So I checked it cold, and then red hot. Wow a big difference on a 5.5L!
Never run an engine overfull ... so no idea if the frothing aspect is true. And ain't going to try.
So I guess thats why MB stipulated check when hot.