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Discussion Starter #1
My car has had 10w-40 every 10'000km (~6'000mi) for the past 210'000km (130'000mi) and burns no oil. Its winter and in the 20s fahrenheit every morning. Thinking I'll switch to 0w-40 to get the old flowing faster...

opinions?
 

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11 Mustang Convert,.87 El Camino,09 Avalon Limited,05 GMC Sierra Denali, hunting AMG car.
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change?

You've used 10w40 for 130,000 miles,with no problem,and you want to change?????
 

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Discussion Starter #5
You've used 10w40 for 130,000 miles,with no problem,and you want to change?????
this is a very valid point. i suppose it's the old, "maybe this is better" routine versus staying the course...

probably should stay the same since its a 20 year old engine that (remarkably) doesn't consume any oil.
 

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1993 300E, 2003 996 Turbo X50
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My car is in the same situation as yours, as far back as I can see 10w-40 was used in mine and it doesnt burn a drop with 203k on it. Unless it starts dropping to 20 below zero fahrenheit I see no need to mess with a good thing.
 

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Depends on the week
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My car is in the same situation as yours, as far back as I can see 10w-40 was used in mine and it doesnt burn a drop with 203k on it. Unless it starts dropping to 20 below zero fahrenheit I see no need to mess with a good thing.
exactly.


the only benefit to a 0 weight oil is its flow when cold. it gets to places faster but once it warms up, it's the same garbage as a 10 weight oil.

i only use mobil 0w-40 because of its cold flow properties and it gives me more time between oil changes
 

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1994 E320
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is there a non synthetic 0w40 readily available..i switched to synth, but it is seeping a bit more than it was
 

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Mercedes 300 TE 24v SportLine -91 W124
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is there a non synthetic 0w40 readily available..i switched to synth, but it is seeping a bit more than it was
There is no difference in viscosity between synthetic 0w40 and mineral 0w40.
If it's 0W then it IS 0W. ;)

Personally I don't know if there is a mineral oil that has down to 0W in viscosity.
 

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95 E320 Cabriolet, 140K
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Angus, if you do a lot of short trips then 0W-40 is appropriate and likely better than 10W-40 for winter driving.

Mercedes has allowed back-specification of 0W-40 for their older vehicles.

0W-40 is available only in synthetic. This grade doesn't exist as a regular oil. Such a low viscosity made from regular oil would result in too much oil loss from vaporization during use.
 

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1994 E320
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jarre and Kestas..thanks for the info.. i thought as much but have been wrong before so i figured i would ask.
 

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1994 E320
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I recently purchased 94 E320 98K on clock. Oil gauge was always around 1.1 while sitting traffic light with warm engine. I changed the oil with 0w-40 and oil pressure went down to 0.5, sometimes even lower. I am thinking it went down because of oil. Any comment would be appreciated.

Thanks.
 

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1993 300E, 2003 996 Turbo X50
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Oil viscosity can have an effect on pressure. When I first purchased my BMW the PO put 10w30 in it (a big no no) and at idle the low oil pressure light would come on due to lack of pressure from the thin oil. Switched it to 15w-50 and all was well again. Not sure about your situation though as I have never run 0w in my E320. Others here will be able to tell you what the deal is with your pressure though.
 

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95 E320 Cabriolet, 140K
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Tasyurek, your thinking is correct. Viscosity is one of the factors that affects the oil pressure. That's why you'll see the oil pressure drop as the oil warms up. Its viscosity drops with temperature.
 

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1994 E320
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Thank you guys.
I thought 0w should be fine because once oil gets warmer, 0w wouldn't be problem but didn't work that way.
How bad is if I keep driving like that, oil pressure under 1?
 

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1992 400E 220k
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Lubricant Products Recommendations

I'm thinking of going with Amsoil but now I don't know. I have a 1992 400E with 200k, it is leaking at the front by the distributor cap area but I don't think it is burning it in the combustion chambers at all. One mechanic told me to just use Pennzoil dino and change every 4500 miles. I've always(since 2004 @153k) used Castrol 10w30 every 3000 miles. The Amsoil is $80.00 a change. They also offer anti-freeze products but I don't know if MBs are as fragile as more modern cars like a 2002 Passat or NGSaab with all of the sludge problems. Does anyone here recommend the Amsoil products?, had experience with them?
Thanks,
Curt in Asheville, NC
 

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95 E320 Cabriolet, 140K
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It's a personal decision whether to use expensive synthetic motor oil or regular oil in your vehicle. I personally don't think it's worth it. Save your money and spend it on other issues with your car.

I doubt you'll see any lube-related failures with what you've been doing all along, and your engine will be just fine. MB engines will serve a long time if not neglected.
 

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1993 300E, 2003 996 Turbo X50
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I buy mobil1 10w-40 high mileage at walmart for $22 for 5 quarts. Oil change costs me under $60 and I usually have 3 quarts left over for next time so I only have to buy one 5 quart jug. I used to use amsoil synthetic from work only because it was free but I don't think I'd pay extra over M1 for it though.
 
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