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Mobil1 15w-50 in an m30 powered BMW 535i. She is a "garage queen" so cold starts aren't an issue. I will likely move back to xxw-40 for the next oil change.

Thanks. Since your formula takes tbn into consideration, could I have run about the same oci for the 1989 BMW 535i above with a HDEO such as Delvac 15w40? Thoughts?

1997 Lexus/LS400/4.0-liter 1UZ-FE V8/Maxlife Semi Syn/5w30/SN 1989 BMW/535i/3.4 M30 I-6/Mobil1 15w50/SN Thanks in advance! Chadd

dont get me wrong, bmw's are amazing vehicles, but the only vintage i would touch is E39's or earlier. +1

+1

According to the internet reports, he made some very inappropriate comments about the new Top Fuel champion at the awards banquet. I wasn't there, but considering the abrupt nature of his dismissal, something must be going on.

1989 BMW 535i 161459 Out: Mobil1 0w40 In: Mobil1 15w50 Reused NAPA Filter

1989 BMW 535/5speed with M30 (3.4-liter (3430 cc) SOHC inline 6-cylinder) w/ 167k+ on the clock. I have been running Mobil1 0w-40 for about 1000 miles with no consumption or other known problems.

I own a m30 powered 1989 535i. T6 is a fine choice, but I am running Mobil1 0w-40 without leaks or significant oil consumption. You win with either oil.

In 1986, I used nothing but the best for my 1976 Chevy Chevette/ 4spd: Castrol GTX 10w-40 in the winter and 20w-50 in the summer. My father mandated 3k oci with spark plugs after every other oil change. It ran until the shock tower rusted thru. What a great car!

Caterham: Thanks for the reply. Mobil1 0w-40 it is.

http://www.mag1.com/ProductDetails.aspx?id=ebc23d55-587b-45bd-9904-9f2fa89c0c59 According to other BITOG posts, Warren makes Mag1 and Supertech. If that is the case, the specs above should mirror the Supertech specs.

Caterham: You're right about the oil pressure gauge. I only have an "idiot light" for oil pressure. Thanks for the advice on the 0w40 Mobil1, it's easy to find and comparatively cheap at Wally World. Many of the UOAs for Mobil1 0w-40 have an oci of about 5k, no problems running this oil 7500?

dparm: Thanks for the clarification. In light of that distinction, what's your suggestion?

I have read a ton of posts, but would still appreciate your thoughts on oil for my baby. She is a E34 535i/5 speed (1 of about 1100 built in the 1989 model year) with the M30 motor with about 160,000 miles. The valve cover was off last month and there was no sludge in slight. She resides in the...

1989 BMW 535i/5 speed 159,855 In: Pennzoil Conventional (PYB) 10w-40 / NAPA Gold Filter Out: Supertech 5w-30 Syn / Mahle Filter (2100 miles)

I have had great luck with Nano wax. Here is the link: http://www.eagleone.com/superior-nanowax-spray

Great car. I owned a 1997 SC1 as well. She burned oil like all of the rest of them do. I used Pennzoil (PYB) to decrease the consumption a bit. It was a great car that was stone reliable. Buy it! http://www.bobistheoilguy.com/forums/images/icons/default/smile.gif

Friday night BMW E34 535i/5 speed M30 engine Out: Rotella T (2800 miles) In: Supertech 5w-30 Synthetic Filter: Mahle Marked gas mileage improvement around town and no oil pressure light problems; the Supertech should serve well over the next 5000-7500 miles.

Synthetic