d215yq
Senior Member
- Joined
- Mar 28, 2008
- Messages
- 2,664
- Reaction score
- 702
- Age
- 39
- Location
- Valencia, Spain
- Your Mercedes
- 1987 W124 300D 280k miles
Hi All,
Well I got a bit bored of the oil light coming on every few weeks (it comes on even when the oil is nearly 2/3rd full now) so put about a litre extra oil in and now it is overfilled. This has also coincided with a leak happening (yes I know, my fault but I was in a rush and the light is ****** annoying when driving at night and coming on regularly).
Does that mean a seal is bad or just that it will be fine by the time the level is correct/when i do an oil change to the correct level? I can't see where the leak is (collects in the tray but I think it's coming from top engine on air intake side (not exhaust side) as that side (above the engine mount) has fresh black oily residue. I will investigate and try to remove tray later to understand the extent/location.
It's also overdue an oil change so as the oil seems to go down more in summer than winter am I correct to buy 10W50 instead of 10W40 (keep the cold start protection but not have it leak/burn so much in hot weather). I was advised that 10W40 is too thin on an engine with not far off 300k miles on it anyway. Before the overfillign/leak it used about 50ml/1k miles winter and 200ml/1k miles summer on 10W40.
Can I also cut the wiring from the sump sensor and leave open circuit, or do I then need to complete the circuit to have the light go off permanently? I understand that may not be the brightest idea but now it comes on at 2/3 full I reckon I would have to keep adding 100-200ml at a time to keep light off and it under maximum (which is typically every 2 or 3 weeks) and it really isn't worth the bother, particularly as I understand it is better to be nearer the min than the max on this engine (indeed there is a big warning sign about overfillign it on the cap, and I can see why!)...and there is still the oil pressure gauge that works fine to "check" for oil...
Well I got a bit bored of the oil light coming on every few weeks (it comes on even when the oil is nearly 2/3rd full now) so put about a litre extra oil in and now it is overfilled. This has also coincided with a leak happening (yes I know, my fault but I was in a rush and the light is ****** annoying when driving at night and coming on regularly).
Does that mean a seal is bad or just that it will be fine by the time the level is correct/when i do an oil change to the correct level? I can't see where the leak is (collects in the tray but I think it's coming from top engine on air intake side (not exhaust side) as that side (above the engine mount) has fresh black oily residue. I will investigate and try to remove tray later to understand the extent/location.
It's also overdue an oil change so as the oil seems to go down more in summer than winter am I correct to buy 10W50 instead of 10W40 (keep the cold start protection but not have it leak/burn so much in hot weather). I was advised that 10W40 is too thin on an engine with not far off 300k miles on it anyway. Before the overfillign/leak it used about 50ml/1k miles winter and 200ml/1k miles summer on 10W40.
Can I also cut the wiring from the sump sensor and leave open circuit, or do I then need to complete the circuit to have the light go off permanently? I understand that may not be the brightest idea but now it comes on at 2/3 full I reckon I would have to keep adding 100-200ml at a time to keep light off and it under maximum (which is typically every 2 or 3 weeks) and it really isn't worth the bother, particularly as I understand it is better to be nearer the min than the max on this engine (indeed there is a big warning sign about overfillign it on the cap, and I can see why!)...and there is still the oil pressure gauge that works fine to "check" for oil...