Reply With QuoteMaybe your engine is coked up in the first place whereas the synthetic knocked them loose and cleaned your engine...
2 Grand Master
Mobil 1 0w40 question
I have used Mobil 1 0w40 for the past 16,000 or so miles. I have changed oil and filter (Mann) every 4,000 to 4,500 miles. I have never had the oil stay amber colored for long. It seems to get dark quickly. For example, my current oil has only 2,500 miles and feels a bit gritty when run between my fingers. Car runs fine. Is anything-wrong going on here?
I may be just a bit paranoid. TIA
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
4 Grand Master
Maybe your engine is coked up in the first place whereas the synthetic knocked them loose and cleaned your engine...
2 Grand Master
Thinking the same but-
I have gone through several oil/filter changes. Would have thoughtti would be cleaned out by now?? Thanks
Originally Posted by Tiger
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
Super Moderator
My engine has been running synthetic for the last 40k miles and each time I adjust
valves i notice a little less buildup in the head in the valve cover and inside surfaces of the head, it looks like synthetic oil has a nice slow detergent process cleaning up all the old buildup, varnish and sludge slowly....I wouldn't be too concerned about yours.
Major Contributor
That is why it starts creating leaks sometimes.... cleaning up the seals and gaskets.
I am always worried about switching to synthetic on old engines...
'85 Euro 635csi Race Turbo, megasquirt, Group A
'92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
'02 Subaru WRX Wagon with STI springs, bigger sway bars
2 Grand Master
So far no leaks & no oil burning
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
4 Grand Master
If you are really concerned, do a oil analysis service.
Green Beret Special Ops
if you get leaks after changing to a good oil you have issues about your gaskets not an oil.
95 E34 530I V2.37
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2 Grand Master
no leaks at present
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment
Big, Big Time Poster
I don't think that is an issue with synthetic any more -
It was in the early days, but for some time synthetics have an additive that helps expand seals to prevent this. If you do get a leak after changing to synthetic, then I think you probably had a lot of gunk that was preventing the seal from even getting lubricated by any oil at all. Not a good situation and one that needed to be corrected.
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