burning Mobil 1 in a BMW M3

[Pantdino]

I got a 1995 BMW M3 in 2000 with 93M on it and have been using conventional 20w50 oil with changes about every 5M, at which time the countdown lights for oil change are only about half way down.

With that oil it used about a quart every 3M

Then last time I changed to M1 red top 15-50 and it's been burning a quart every 14000-1800 miles.

Is that bad for the combustion chambers?

Should I go back to conventional oil?

Thanks,

Jim

 

[buster]

Their are many reasons for oil consumption. Have a quick read.

https://www.amsoil.com/dealer/techservicesbulletin/oilconsumption_0403_2004.pdf


With any high mileage car, when switching to a high detergent synthetic, it can take up to 5,000 miles before oil consumption settles down.

In my car, after the first 4,000 miles of the cars life using dino, I switched to Mobil 1 Extended Performance. It burned a little bit after not using any previously with dino. It has since stopped completely as far as I can tell.

Mobil 1 is a low volatile oil with Noak % range from 7-10%, well below the 15% requirement. Give it some time before switching. I think too many switch too soon. Redline has the same effect. I ran in my Toyota and the car drank the oil at a rate it never had before on multiple oils. If after your first oil change or 5k + miles, it hasn't stopped, then look for a new oil.

 

[Palut]

I thought that M3s required 10W-60? Is that just the newer models?