[W126 Coupe] LOW COMPRESSION

[Jay Hirsch]

What about 15w-40?
keep cruisin
Jay H
On Jul 16, 2009, at 1:15 PM, ken spaulding wrote:


> I have a 91 560 SEC that had similar low compression about a year  

> ago including old consumption deteriorating to something like 2 qt  

> in about 300 miles.  The change was subtle at first until it  

> reached what I indicated....

> Solution was to use a detergent product with the oil for about 20 -  

> 30 minutes and then drain and refill with a cheap oil along with a  

> new filter.  Run engine for another 30 minutes and again drain.  At  

> that time I was "using" Castrol 20W - 50.  Refill with your oil of  

> choice and filter and do the compression test again.  The results  

> should be immediate if that is your problem

> My result was a raise of compression to the normal of around 185  

> +/- .  The mechanic that suggested this said the problem was most  

> likely the ring groves of the pistons being clogged preventing the  

> rings from doing the function of maintaining compression and  

> therefore the high oil consumption.

>

> Years ago I had heard of the same thing except the person ran  

> transmission fluid for several hundred mile and his problem cleared  

> up.

>

> Certainly worth a try before you dump BIG bucks into your engine.   

> Good luck, Ken

>

> Jonathon has stated numerous time of using MOBIL EP 15W - 50.  In  

> researching this oil in reference to the old school technology it  

> is the best for our dated vehicles.... Has to do with additives  

> that prevent wear of the internal parts.

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