High mileage motor oils - BMW Forum

jek1955 · 09-06-2005, 09:19 AM

I have a '92 w/150k miles, manual 5 speed. It consumes 1 quart every 1500 miles. I find no appreciable amount of leakage where I park so I assume it's buring it, although I don't notice any smoke while driving. I have yet to have anyone follow to check for smoke while I drive or shift. Will the high mileage motor oils available slow this down? Will these oils do anything to my seals or gaskets?

someguy · 09-06-2005, 10:22 PM

look in your coolant resivior for sludged fluid....also look under you oil cap for sludge, you may also be experiancing blow by.....look at you air filter box and MAF.....hopefully its none of the above. you might have so bigger issues, if your not burning it and you sure of it, then its going somewhere else in the engine

drz · 09-07-2005, 12:17 AM

^^ Can't really add anything else to that. Come back with results so we can further help you.

thekid · 09-07-2005, 02:01 AM

My car is going to hit 170k miles this weekend. I use regular Castrol GTX. I do not think that it will hurt anything to use a special High Mileage oil, but I do believe that they are more expensive... All I can say is give it a shot. If it gets worse... hopefully switching back will correct it back to what it is currently.

BMWJNKY · 09-07-2005, 02:06 AM

Check your breather hoses from the intake and valve cover. Your cyclone separator may be bad and pulling oil into the intake then burning it when it gets to the engine.

jek1955 · 10-06-2005, 08:53 AM

I do not see anything unusual or sludge in the coolant reservoir or on the oil cap. Would this indicate there is nothing happenning within the block? I have also recently changed the air filter and didn't notice anything there either although I wasn't looking for oil at the time.

cloaked95 · 10-06-2005, 12:45 PM

Quote:

Originally Posted by jek1955

I do not see anything unusual or sludge in the coolant reservoir or on the oil cap. Would this indicate there is nothing happenning within the block? I have also recently changed the air filter and didn't notice anything there either although I wasn't looking for oil at the time.

AJ was talking about the breather hoses. If Oil is evident on the hose like its dripping out, you might have a blow-by. But 1500 miles on a quart of oil isnt terrible. High Mileage oils advertise some kind of sealing compund. I'd try it for about 2-3 oil changes. You wont be able to see results on the first change.
Good Luck B)