Always used 10/40 Quaker State oil, but just switched to Mobil 1 10/30 high mileage synthetic. Just did an oil change (4500km), have a concern...after removing the oil filter, noticed the filter is pretty clogged. Oil spilled & oil filter base (where oil filter attaches to) is flooded with oil. I had to soak up the oil in the oil filter base with rags & it took a while before all the oil drain back into the engine. This is the first time I seen this ever!!! Should I go back to using the regular oil rather than this Mobil 1 high mileage synthetic oil?
Last edited by cypress188 : 02-28-2008 at 12:28 PM.
Reason: spelling
I dont think you can switch back to regular oil again.
Really? I have been doing a bit of reading on Mobil 1 and MB 229.1 chart which I posted for approved oils, I have not seen that yet anyway. Not saying your wrong, I just have not seen that and I would like to find out more. Must be a Seals thing maybe???
Mobil states to the High mileage brew is for engines that have been running Mineral Oils , over 75K miles and to make the first change around 3k since it is cleaning up the sludge and stuff.
My guess would be it did just that and what you saw in the filter it's working cleaning up the yuk. I have been using Penzoil 10w-40 and I too am considering switching over. Upon Head gasket replacement, I was very happy with the Penzoil, no sludge anywhere at 110K and I have been slacking on Oil changes , at 120K she still doesn't burn any oil.
As I already posted the Mobil 1 10-30 in not MB Approved for our 190's, but the choices are all xW-40 or xW-50
I went to Pep Boys ( only so far ) and they don't carry a Mobil 1 in any 40 weight, Manger said it is not popular. They do have a 15-50 which according to Page 112 in the owners manual would work for me in Calif Temps.
Mobils website plugging in my temp and car says 10-30 mmmm.
The High Mileage brew is not on the MB lists I have found either, might be too new.
They were on sale, bought a FEW...wanted to baby my baby. Sold my Grande Cherokee & can't use it on my TL, Acura recommends 5-20. So have to use them up on the 190E.
Had valve job done on my 190E recently, NEW "seals"...therefore wanted to switch oils. Will change oil again in 3K km & keep an eye on for sludge.
Most of what I have been reading is advertising stuff of Independent testing.. :-) , so with a grain salt. The only one I trust so far is the MB sheet.
I had that issue with M1 when I changed my Honda to it, but I was expecting the cleaning power and changed the oil and filter again after 2000km. 3 changes, 5000km intervals, have given me clean oil; only the first change was thick due to all the sludge that was cleaned out.
I also run M1 5W20 in my Acura, but it has only 38,000 km on it. In the MB diesel, I use Delo 400 and change every 5000km.
I wouldn't be worried. Chances are, most of that was from the sludge that the synthetic dislodged from your engine. But it is a good thing you changed your oil filter. For the next few changes it will be dislodging some junk from your oil pan and camshaft areas so make sure to change your oil filter soon.
But yeah, assuming the sludge won't clog your oil pump, you are doing your engine a favor and cleaning it's internals up.
Oh yeah, and don't worry about switching back to regular. But the synthetic is much better and you can also change your oil less often.
Not to worry. If you want you can switch back to regular mineral oil.
We have to remember that the term "synthetic" is a misnomer. So-called "synthetic oil" is crude oil that has been refined slightly more than mineral oil and proprietary additives have been added.
The main difference is that the molecules in "synthetic oil" are smaller and in smaller chains than mineral oil which consist of longer chains and molecules. Therefore the "synthetic oil" will cling to moving engine parts longer than its first cousin, mineral oil.
Too, "synthetic oil" is less volatile and therefore more resistant to heat and foaming than mineral oil.
Since 80 percent of engine wear occurs at startup, it is consistent with reason that the more lubricated the engine parts remain after shutdown, the better. Another 80 percent of engine wear occurs when redlining an engine, so the less volatile the oil, the less is the wear.
I've used M1 high mileage for a year with very satisfactory results in my 190e 2.6.
But the choice of an engine lubricant is a matter of individual opinion based on results.
Last edited by drcharlesatlas : 03-07-2008 at 08:25 AM.
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