what kind of oil should I use ???? - Mercedes-Benz Forum

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post #1 of 16 (permalink) Old 02-25-2009, 02:29 PM Thread Starter
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what kind of oil should I use ????

Howdy all just asking what kind of oil to use on my 1967 250s ? Thanks for stopping

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post #2 of 16 (permalink) Old 02-26-2009, 08:36 AM Thread Starter
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cant find in book any help

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post #3 of 16 (permalink) Old 02-26-2009, 12:02 PM
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Everyone has different opinions but any name brand 20-50W oil should be fine. Just don't change brands repetitvely.

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post #4 of 16 (permalink) Old 02-26-2009, 03:27 PM Thread Starter
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thanks do you think 10-40 would be fine?

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post #5 of 16 (permalink) Old 02-27-2009, 01:24 AM
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Originally Posted by firstbenz250s View Post
thanks do you think 10-40 would be fine?
It depends on the condition of your engine. The rationale behind the heavier-weight oil, particularly for an old and/or worn engine, is that the engine's internal clearances have expanded such that more viscosity is required to produce the same or similar oil pressure.

However, as you live in Michigan I'd also want to know if and how often you start your car in extremely cold weather. The higher weight oil makes cranking slightly more difficult in extreme cold and even creates more difficulty for the oil exploring the engine's entire set of passages in the first several seconds of running. This carries negative implications with respect to internal wear.

For this reason, some people in less temperate zones switch weight with the season. In summertime, with certain cars, I've actually run straight 40-weight oil because I didn't trust the multi-viscosity ratings. But that was then, this is now--oils have improved over the years.

Long way of saying, you're probably fine with either weight, particularly if you keep your car in a heated garage. How is the oil pressure reading?

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post #6 of 16 (permalink) Old 02-27-2009, 05:12 AM Thread Starter
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It depends on the condition of your engine. The rationale behind the heavier-weight oil, particularly for an old and/or worn engine, is that the engine's internal clearances have expanded such that more viscosity is required to produce the same or similar oil pressure.

However, as you live in Michigan I'd also want to know if and how often you start your car in extremely cold weather. The higher weight oil makes cranking slightly more difficult in extreme cold and even creates more difficulty for the oil exploring the engine's entire set of passages in the first several seconds of running. This carries negative implications with respect to internal wear.

For this reason, some people in less temperate zones switch weight with the season. In summertime, with certain cars, I've actually run straight 40-weight oil because I didn't trust the multi-viscosity ratings. But that was then, this is now--oils have improved over the years.

Long way of saying, you're probably fine with either weight, particularly if you keep your car in a heated garage. How is the oil pressure reading?
well since i just got the car it was kept in a garage engine sounds good no drips or spots on my floor or the guy garage floor i got the car from but old engine looks very well kept like the rest of car and I dont have any plans on driving in the cold however the oil in engine now is real black and pressure read high when starting

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post #7 of 16 (permalink) Old 02-27-2009, 03:27 PM
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well since i just got the car it was kept in a garage engine sounds good no drips or spots on my floor or the guy garage floor i got the car from but old engine looks very well kept like the rest of car and I dont have any plans on driving in the cold however the oil in engine now is real black and pressure read high when starting
Congrats on getting your hands on a well-cared-for 250S! Now change the oil & filter! Either weight is fine; all other things being equal I'd probably go with the 20W50 as long as I wasn't going to start it in subfreezing weather too much. How's the pressure when you're warmed up and driving along? That's the real measure. Anyway congrats

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post #8 of 16 (permalink) Old 02-27-2009, 03:40 PM Thread Starter
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thanks

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Congrats on getting your hands on a well-cared-for 250S! Now change the oil & filter! Either weight is fine; all other things being equal I'd probably go with the 20W50 as long as I wasn't going to start it in subfreezing weather too much. How's the pressure when you're warmed up and driving along? That's the real measure. Anyway congrats
well I cant get her to stay running any ideas ?? old (2nd)owner said I may have to adjust the carbs
Here she is



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post #9 of 16 (permalink) Old 02-28-2009, 02:19 PM
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Hard to diagnose cars over the internet but fuel supply would definitely be one of the first things I'd look at.

There is scarcely anything in the world that some man cannot make a little worse, and sell a little more cheaply. The person who buys on price alone is this man's lawful prey. --John Ruskin
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post #10 of 16 (permalink) Old 03-01-2009, 06:36 AM Thread Starter
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Hard to diagnose cars over the internet but fuel supply would definitely be one of the first things I'd look at.
???

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