quick question - engine oil

Franklin Joseph · #1 06-21-2008, 05:57 PM

I just got done changing the oil in my 4.6. In the past i've used 5w30 or 10w30.
I was planning to use 10w30 today, but i accidentally used the wrong oil (meant for my other car)
I put in 15w50.

How is this going to affect the car? should i drain it and use 10w30 or will i be good? Car isnt daily driven, maybe on weekends only, however, i'll be towing my racecar next weekeend (about 250miles RT)

Thanks
Franklin

Wagner · #2 06-21-2008, 06:00 PM

It is a significantly heavier weight then OEM recommends. I'd probably drain it and do it again

Franklin Joseph · #3 06-21-2008, 07:46 PM

drats...not what i wanted to hear...but i'll drain it...

thanks
franklin

motordavid · #4 06-21-2008, 08:48 PM

In your Houston ambient temps, I wouldn't blink...
your mpg may reduce a touch, due to the 50 top,
but I doubt it, and I would not worry a lick.

Withidl, a very knowledgeable ex-petro engineer,
runs sim oil in his TX based X, pulls an airstream,
etc. M cars come with 60 top viz and few see any
driving other than freeways. Drive it and enjoy it, imo.
GL,mD

Tomaz · #5 06-22-2008, 12:33 AM

It will not hurt your engine, you milage may be slightly less. I'd wait for the next scheduled oil change.

lo_jack · #6 06-23-2008, 11:17 AM

Quote:

Originally Posted by Tomaz

It will not hurt your engine, you milage may be slightly less. I'd wait for the next scheduled oil change.

I agree. There's no reason to waste money. I'd run 0w30 in mine if I could find a good source for it. Of course down on the Gulf Coast it never freezes. Run the 15w30 until it's time for a change.

Tomaz · #7 06-23-2008, 02:05 PM

Quote:

Originally Posted by lo_jack

I agree. There's no reason to waste money. I'd run 0w30 in mine if I could find a good source for it. Of course down on the Gulf Coast it never freezes. Run the 15w30 until it's time for a change.

Amsoil has a 0W-30, but in Texas I'd run the 5W-30 Amsoil. I have been running Amsoil products for a long time and think it is one of the best oils around.

Big "J" · #8 06-23-2008, 03:09 PM

Quote:

Originally Posted by Tomaz

Amsoil has a 0W-30, but in Texas I'd run the 5W-30 Amsoil. I have been running Amsoil products for a long time and think it is one of the best oils around.

Do you think it's better than Mobil 1 0W-30?

Tomaz · #9 06-23-2008, 06:52 PM

Quote:

Originally Posted by Big "J"

Do you think it's better than Mobil 1 0W-30?

According to this test; http://www.amsoil.com/storefront/sso.aspx , Amsoil is twice as good as Mobile1 for wear.

vinuneuro · #10 06-23-2008, 03:20 PM

FJ, drain it into a clean container and throw it in the M3 next time it needs oil; no waste. 15W-50 is a ton more viscous that the factory spec.

Big J: Mobil1 0W-30 is a very thin oil. Towards the very bottom of the 30wt range; go with M1 5W-30. Amsoil Series 2000 0W-30 is a very very good oil. All the Amsoil products (including Air Filters) are outstanding.