Urgent advise is requested...i need to switch to synthetic oil TODAY, but I'm still not sure what GRADE to buy , 1998 C230 WITH 90K MILES.

Please advise soon.

Go IMMEDIATELY to Auto Zone and purchase Mobil 1 0W-40.

SORRY I couldn't get back to you sooner.

GOOD LUCK.

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Kent Christensen
Albuquerque
'07 GL320CDI, '06 SLK350

wow Ikcris, what took you sooo long????.....anyway thanks so much.
One more question before i go to Autozone, what about Amsoil 0W 40?

Use the european 0-40 oil that Amsoil has it has the highest spec the Mercedes has out right now, and you will be fine.

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89 Ford F3504x4CC 7.3 IDI turboed Intercooler and running on wvo now powered by a 1997 Cumins
87 300SDL on bio and wvo killed by chevy truck 5-24-06
1999 E300TD black with gray int.

WallsMart is another source for the M1 0W40 oil.

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1998 W210 diesel (wiped out by a texter)
Baum spring compressor "for rent"

Amsoil's AME 15W-40 will also work just GREAT! (Unless you live in a very frigid area)

Pennzoil Platinum 10W-30 is on sale for $0.99 per quart after rebate at Schucks, Kragan, etc.

A '98 doesn't really need a 0W-XX oil, IMHO.

Cheers!

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'91 420 SEL @ 199K, '92 SVX @ 181K, '93 SC400 @ 86K, '93 Kaw ZX-11 @ 30K, '87 F250 @ 181K , 2001 Valkyrie Interstate @ 6K, Y2K Honda NightHawk 250 with 1.5K, '88 420SEL I.@ 179K & the 2nd latest, an '88 420SEL II.@ 210K runnin' parts car, '85 F150 300/NP435

Mobil 1 0w40 is always a good choice.

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1999 SL500
2016 Ram 1500
2007 Tiara 3200

As per MB USA:
Vehicles with Flexible Service System FSS or FSS+ starting MY1998 can use 229.5, 229.51 or 229.3 oils.

As per Mobil 1 website:
Mobil 1 0W-40 meets key industry and car builder specifications for Mercedes MB 229.5

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ARVY

1999 E430
1999 C230 Kompressor
1992 300E (write-off)
1984 190D 2.2 (sold)