Reply With Quoteprobly no harm.
the PO ran 10w-30 in it. I use shell rotella t synthetic 5w-40 in my car. Engine is a lot smoother and quieter now.
Big, Big Time Poster
Oil Change...
I need some expert opinions.
I put 10w30 mobil 1 into the 540 about 1000 miles ago. Then it looks like I should've been using 15w40 and recommended 5w40. Did I harm the engine?
I'm about to change the oil to 5w40 synthetic. Is it recommended to change the filter (only used for 1000 miles) or should I let the filter in for another 4000 miles then change it?
Thank you.
Major Contributor
probly no harm.
the PO ran 10w-30 in it. I use shell rotella t synthetic 5w-40 in my car. Engine is a lot smoother and quieter now.
Mark
1999 M3 Cosmos Black/ Black 78k
1994 540i Oxford Green/ Silver Grey Sold @ 133k
1995 M3 Arctic Silver/Black Sold @ 117k
1990 325i Zinnobar Red/Black Sold @ 115k
Green Beret Special Ops
your good, I used 5w-30 M1 before switching to the 0w-40. Did you switch from regular oil? If you did then you might as well change the filter out from the initial flushing action from the thinner synthetic...but I wouldnt sweat it either way.
edit: If I was you I wouldnt bother changing the 10w-30 out yet but change it earlier than 5000 miles due to the initial flushing action if this is your first change to synthetic.
95 E34 530I V2.37
===========
Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
Grand Master
I would wait until 3000 miles have elapsed & swap to Mobil 1 0W-40 plus change filter as well.Originally Posted by txp135
From there change every 5,000 miles.
"I'm not the village idiot.
But when he retires I'm next on the list."
This thread got me to wondering...the Touring I bought recently was serviced regularly by BMW. The reciepts leave no indication of what oil they used. What do you guys think the dealer would use in a '93 with M50?
Major Contributor
15-40 castrol dino here!!!! haha ready to piss some people off
Big, Big Time Poster
PO said only synthetic after alusil block swap. So it's not a matter of switching to synthetic, just that if I should change the filter or not.
here we go, your gonna love this, mobil 1 20w50 in 90 525ia m20
Big, Big Time Poster
Hey where do you find that 20w50 m1? I like to run the thicker oil in the summer because my m50tu has a rather noisy valve train on startup with the 0w40. I found 15w50 @ walmart (ewww) but thats the closest I can get, thanks.
1993 525iA M50TU
Black on Black...need pics
208,888 miles
4 Grand Master
I would say don't bother changing the oil... however, if you do, no need to change filter.
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