Mixing two different oils?
Thread Starter
Member
Joined: May 2007
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From: Scottsdale, AZ
2002 C230K Coupe
Mixing two different oils?
I got the 'Check Oil Level' message while driving today so I went to a store and bought a Mobil 10-40W oil to top it up. Since I bought the car two months back, I do not know what oil was put in it. So what would happen if I put the 10-40W and the old oil in the car was something different?
Also, can I add the oil through the Oil dipstick opening?
Also, can I add the oil through the Oil dipstick opening?
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From: Orange County
2005 C Wagon (No snickering please!)
Did you use conventional oil or Mobil 1 synthetic? It is important to use the Mercedes approved Sheet 229.5 Mobil 1 0W 40 oil. It must say on the bottle that it meets Mercedes Sheet 229.5. All oils and most other Mobil 1 synthetics DO NOT meet the specification.
The specified products are needed to prevent engine sludge. If you use the Mobil 1 0W 40 and fleece oil filter, you engine will run 250,000 miles with virturally no wear.
I don't see why you could not add oil through the dipstick tube, but why not use the oil cap?
The specified products are needed to prevent engine sludge. If you use the Mobil 1 0W 40 and fleece oil filter, you engine will run 250,000 miles with virturally no wear.
I don't see why you could not add oil through the dipstick tube, but why not use the oil cap?
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From: Orange County, CA
GMC - Miata - Trek - P-Car
One is well advised to follow the information offered by Moviela. He has a tremendous breadth of knowledge, which he often shares with our forum. I would relish a week of carpooling with him, as he would undoubtedly make for a short commute!
This link http://whnet.com/4x4/oil.html specifies all the approved Mercedes-Benz motor oils. I regret that I cannot give due credit to the member who originally posted this specification sheet.
This link http://whnet.com/4x4/oil.html specifies all the approved Mercedes-Benz motor oils. I regret that I cannot give due credit to the member who originally posted this specification sheet.
Thread Starter
Member
Joined: May 2007
Posts: 99
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From: Scottsdale, AZ
2002 C230K Coupe
Thanks for all the suggestions.
I decided to go in for a complete oil change instead of adding just 1 or 2 quarts. I am not sure what oil was put in the car during previous service and when it was put in, so don't want to risk it by adding a different weight oil.
I talked to a mechanic and he said he will put in valvoline fully synthetic for 70 bucks, I am not sure if filter change is included in that price. Any idea how much a mechanic would charge elsewhere for a complete oil and filter change?
I decided to go in for a complete oil change instead of adding just 1 or 2 quarts. I am not sure what oil was put in the car during previous service and when it was put in, so don't want to risk it by adding a different weight oil.
I talked to a mechanic and he said he will put in valvoline fully synthetic for 70 bucks, I am not sure if filter change is included in that price. Any idea how much a mechanic would charge elsewhere for a complete oil and filter change?
Senior Member
Joined: Feb 2006
Posts: 411
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From: Florida
'04 C230K SS
I wouldn't add anything different than what's in there now. Different oils have different charasteristics...if every oil would be the same, then you could use cooking oil for your car and motor oil on your kitchen. I don't reccomend yuseing different oils. As for the dipstick...why not use the oil cap?
Just my $.02
Just my $.02
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From: Jakarta
1996 MB E320 & 2010 Nissan Elgrand
So, is it OK to mix 2 different oils? The dealership put Quaker state in my last service and I'm about to top up with Mobile 1 since MB doesn't use Quaker state anymore! (The parts guy said that to me today 
)
Also, does my engine need to be cool first before topping it up?
(My first time doing this 
)
THX
)Also, does my engine need to be cool first before topping it up?
(My first time doing this )THX
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MBWorld Fanatic!
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From: Jakarta
1996 MB E320 & 2010 Nissan Elgrand
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From: Toronto, ON, Canada
MY2001 C320
Thanks for all the suggestions.
I decided to go in for a complete oil change instead of adding just 1 or 2 quarts. I am not sure what oil was put in the car during previous service and when it was put in, so don't want to risk it by adding a different weight oil.
I talked to a mechanic and he said he will put in valvoline fully synthetic for 70 bucks, I am not sure if filter change is included in that price. Any idea how much a mechanic would charge elsewhere for a complete oil and filter change?
I decided to go in for a complete oil change instead of adding just 1 or 2 quarts. I am not sure what oil was put in the car during previous service and when it was put in, so don't want to risk it by adding a different weight oil.
I talked to a mechanic and he said he will put in valvoline fully synthetic for 70 bucks, I am not sure if filter change is included in that price. Any idea how much a mechanic would charge elsewhere for a complete oil and filter change?
MBWorld Fanatic!
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From: Jakarta
1996 MB E320 & 2010 Nissan Elgrand
Checked all my booklets and NOTHING!
https://mbworld.org/forums/showthrea...ng+engine+oils
Found this thread and got no asnwers as well.
I did doublecheck my my receipt from the my last service and it says SYNTH 5W30 Quakerstate.Is it OK to top it up with different grade of oil?(Just bought Mobile1 0W40 as recommended by the parts guy and he also said if it's OK to mix?!
SO, is it OK to mix 2 different oils with the same grade, but different brand? What about different grades?
I guess getting an oil change will be my last plan although I still have about 3,000KMs before my next service. It's been almost a month since my car has a low engine oil,well I didn't drive the car much,ONLY about 200 KMs since the malfunction adding oil message came up.
I need some advise for the experts here
https://mbworld.org/forums/showthrea...ng+engine+oils
Found this thread and got no asnwers as well.
I did doublecheck my my receipt from the my last service and it says SYNTH 5W30 Quakerstate.Is it OK to top it up with different grade of oil?(Just bought Mobile1 0W40 as recommended by the parts guy and he also said if it's OK to mix?!
SO, is it OK to mix 2 different oils with the same grade, but different brand? What about different grades?
I guess getting an oil change will be my last plan although I still have about 3,000KMs before my next service. It's been almost a month since my car has a low engine oil,well I didn't drive the car much,ONLY about 200 KMs since the malfunction adding oil message came up.
I need some advise for the experts here
MBWorld Fanatic!
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Posts: 1,155
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From: Jakarta
1996 MB E320 & 2010 Nissan Elgrand
Just googled about mixing 2 different oils and found out 5W30 grade is a semi-synthetic oil??! 
I thought MB always used fully synthetic oils!
http://www.carbibles.com/engineoil_bible.html
I thought MB always used fully synthetic oils! http://www.carbibles.com/engineoil_bible.html
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From: Orange County, CA
GMC - Miata - Trek - P-Car
I am no expert. Simply run 0W-40, 5W-40 or 15W-50 Mobil1 dependent, of course, on the anticipated ambient temperatures and an OE fleece filter. Toss a spare bottle in the trunk so that if the oil level drops, the same type/viscosity is readily available. Quick and easy.
Should one care to learn more about automotive lubrication and fluid science,
http://theoildrop.server101.com/forums/ubbthreads.php is a worthwhile site.
Should one care to learn more about automotive lubrication and fluid science,
http://theoildrop.server101.com/forums/ubbthreads.php is a worthwhile site.
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From: Norfolk UK
2004 CLK 240
Guys - I don't think that MB 229.5 is required for ALL models.
Here's a checklist found on a MB website.
MB sheet 229.1 approved oils
for passenger cars with gas and diesel engines, used to be minimum spec for latest (98+) engines, high detergent, dispersant spec suitable for normal drain intervals. Based on ACEA A3, B3. Note 229.1 oils are not recommended for MB's latest (2002+) 4 valve gas M271, M275, M285 and diesel OM646, OM647, OM648 engines.
MB sheet 229.3 approved oils
for passenger cars with gas and diesel engines with extended drain interval indicator FSS up to 20,000 km, or 40,000 km - 25,000 mi, current minimum spec for 1998+ MB engines, min. 1.0% fuel saving compared to 229.1, based on ACEA A3 B4. For gas engine of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).
MB sheet 229.5 approved oils; "MB Longlife Service Oils"
for passenger cars with gas and diesel engines with extended drain intervals beyond 229.3 oils, to 30,000 km, min 1.8% fuel saving, first oils introduced summer 2002. ACEA A3 B4. For gas engines of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).
229.5 engine oils must be used with fleece oil filter designed for use with 229.5 engine oils.
Here's a checklist found on a MB website.
MB sheet 229.1 approved oils
for passenger cars with gas and diesel engines, used to be minimum spec for latest (98+) engines, high detergent, dispersant spec suitable for normal drain intervals. Based on ACEA A3, B3. Note 229.1 oils are not recommended for MB's latest (2002+) 4 valve gas M271, M275, M285 and diesel OM646, OM647, OM648 engines.
MB sheet 229.3 approved oils
for passenger cars with gas and diesel engines with extended drain interval indicator FSS up to 20,000 km, or 40,000 km - 25,000 mi, current minimum spec for 1998+ MB engines, min. 1.0% fuel saving compared to 229.1, based on ACEA A3 B4. For gas engine of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).
MB sheet 229.5 approved oils; "MB Longlife Service Oils"
for passenger cars with gas and diesel engines with extended drain intervals beyond 229.3 oils, to 30,000 km, min 1.8% fuel saving, first oils introduced summer 2002. ACEA A3 B4. For gas engines of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).
229.5 engine oils must be used with fleece oil filter designed for use with 229.5 engine oils.
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From: Orange County
2005 C Wagon (No snickering please!)
W203 cars can use sheet 229.3 if they are equipped with a Flexible Service System (FSS). This was on cars through 2003 and some 04's. As the fleece filter came out, the drain interval was extended from 20Km to 30Km (or 1 year.) The 229.5 synthetics make more economic sense. They cost about the same as the 229.3 lubricants, but run 50% longer. The additive package and filter was designed to prevent sludge that was a problem for Mercedes at the turn of the Century, but it also increased CAFE because of its 1.8% fuel savings. In the time the 229.5 oil is in use, you will save about $15 in fuel, enough to buy a new filter. Just makes more sense to use the later spec oils.
There is a long list of products that are approved for sheet 229.5, but many are only available in the rest of the world. The only one on the list that is easy to find in NAFTA is Mobil 1 0W-40. My spies at Mobil tell me that they are the manufacturer for other brands in other countries that sell sheet 229.5 oils.
There is a long list of products that are approved for sheet 229.5, but many are only available in the rest of the world. The only one on the list that is easy to find in NAFTA is Mobil 1 0W-40. My spies at Mobil tell me that they are the manufacturer for other brands in other countries that sell sheet 229.5 oils.
Thread Starter
Member
Joined: May 2007
Posts: 99
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From: Scottsdale, AZ
2002 C230K Coupe
I talked to a Mech and he said mixing two different brands is okay but he didn't recommend mixing two different grades. But then it is better to go with the same brand of oil rather than mixing. I spent 100 bucks on oil change and if you can DIY, it wont cost mroe than 50 bucks.
