Engine Flush??? - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 07-10-2005, 02:21 PM Thread Starter
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Engine Flush???

Engine Flush?

A friend recently purchased 01 CLK 430.
He was told by the previous owner (private sale) that he had been using Castrol GTX 10w30 oil; not synthetic.

He wants to transition back to 0w40 Mobil-1, but is not sure if he should do a motor flush to get rid of the old regular oil before adding synthetic.

Of course the dealer says no ... but has anyone tried any of the engine treatments out there or gone to a mechanic and hooked it up to a engine flush machine ... please let me know the good and the ugly out there so he can make a good informed decision.

Thanks.
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post #2 of 6 (permalink) Old 07-10-2005, 02:37 PM
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RE: Engine Flush???

DO SWITCH TO SYNTHETIC CASTROL SYNTEC 5W-50 THE BEST PROTECTION YOU CAN USE
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post #3 of 6 (permalink) Old 07-10-2005, 05:53 PM
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RE: Engine Flush??? not needed

No engine flush is needed UNLESS the engine is varnished up. Look under the oil filler cap for signs of clear/amber varnish build-up.

I do not recomend 0w-XX oils for hot climates (everything short of northern states winter)-- and long engine lives. 5W-40 synthetic is the lightest I would suggest and really recomend 10W30 or 10W40 fo rthat engine in warm climates.

The lighter viscosity grades are 'recomended' in owner manuals because that's what the maker used in the fuel economy and emissions tests (better economy, lower start-up/warm-up emissions). EPA regulations force the makler to recomend the same viscosity and type of oil used in the certification testing [no special ultra-low friction mega-xpensive mink-milk allowed now], and those oils must be 'readily available to the consumer at non-dealer outlets.
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post #4 of 6 (permalink) Old 07-11-2005, 04:27 AM
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RE: Engine Flush???

I would say that no engine flush is required under any circumstancxes. Synthetic will clean the engine in a short period of time anyway.

See http://www.whnet.com/4x4/oil.html for approved oils.

Len
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post #5 of 6 (permalink) Old 07-11-2005, 09:24 PM
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RE: Engine Flush???

Use regular 15-40 rotella t much less costly filters don`t have micron ability to keep it cleaner anyway and regular oil change will keep it clean for years why waste money on synthetic oils ,someones making money on that stuff 30 years a tech here my Porsche has 350,000 on it with 15-40 and runs great go figure!!my daughters 300 sd 400,000 moms 240 375,000 list goes on !!and geeesh don`t flush the engine and if you do use trans fluid at idle for ten minutes only if engine is dirty inside.
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post #6 of 6 (permalink) Old 07-12-2005, 04:50 PM
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RE: Engine Flush???

Quote:
sokoloff - 7/11/2005 6:27 AM

I would say that no engine flush is required under any circumstancxes. Synthetic will clean the engine in a short period of time anyway.

See http://www.whnet.com/4x4/oil.html for approved oils.

Len
Can anyone reading the page posting of appoved oils provide a clear explanation of the which, why and what for?? The list is confusing. With a 2000 W210 with the 3.2L 6 there is an obvious choice of the Mobil One Supersyn 0-40, but not the 5-30 ?? and then further down the 5-40 and 5-50 seems OK? That sounds like diesel molasses[:0] And then some non-PAO synthetics and old fashioned dino oil blends (Valvoline DuraBlend) are (somehow) OK.

What happened to meeting API classifications (SM, SJ, SL) and move on ??

Mike

Now: 2010 GLK350 4Matic Then: 2003 C320 4Matic, 2006 E320 CDI, 2000 E320, 1994 E320, 1991 190E, 1985 300D, 1983 300D


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