ShivaYash
Senior Member
- Joined
- Apr 29, 2012
- Messages
- 558
- Reaction score
- 12
- Location
- Berlin
- Your Mercedes
- S124 1994 E200 (M111 engine), S123 1983 230TE (M102)
Dear all,
I am still very much learning about cars so forgive this basic question.
Driving home in London traffic last night, after a weekend on A-roads, my car's engine temperature was higher than normal, and hit the 100/120 mark on the dial. The viscous fan was working and I tried increased the revs whilst waiting for 10 minutes at a temp. traffic light, thinking this would bring the engine temperature down, as the fan would be turning faster - but it did not.
The oil pressure also dropped. The oil pressure was different when in neutral compared to when in drive. Is this usual?
Now I understand that as the temperature goes up, oil becomes thinner, hence the drop in pressure. At all times pressure was back up when the engine was revved.
The car was at this 'high' temperature for about 45 minutes. Can such temperatures cook the oil and cause it to 'fail', lose efficiency, and hence need to be changed more frequently than 12 months? At present the car is serviced every April, and I follow the schedule as stipulated by MB. I always use original filters and the correct high quality oil.
I do sub 5000 miles per year, a mix of city and country driving.
Many thanks,
I am still very much learning about cars so forgive this basic question.
Driving home in London traffic last night, after a weekend on A-roads, my car's engine temperature was higher than normal, and hit the 100/120 mark on the dial. The viscous fan was working and I tried increased the revs whilst waiting for 10 minutes at a temp. traffic light, thinking this would bring the engine temperature down, as the fan would be turning faster - but it did not.
The oil pressure also dropped. The oil pressure was different when in neutral compared to when in drive. Is this usual?
Now I understand that as the temperature goes up, oil becomes thinner, hence the drop in pressure. At all times pressure was back up when the engine was revved.
The car was at this 'high' temperature for about 45 minutes. Can such temperatures cook the oil and cause it to 'fail', lose efficiency, and hence need to be changed more frequently than 12 months? At present the car is serviced every April, and I follow the schedule as stipulated by MB. I always use original filters and the correct high quality oil.
I do sub 5000 miles per year, a mix of city and country driving.
Many thanks,
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