Lucas synthetic oil addititive. Thoughts?

[graphikg]

When I drive my 13k with rebuild s50 motor hard, I get this clicking. So I added this Lucas oil syn additive. I think it actually made a difference but I have to take it through more testing if you know what I mean. Plus, I was hoping this Lucas magic would inhibit this slight leak I have, but that may be due to such a light syn mobile 1 5w-30 oil weight. Does anyone else have experiences with the Lucas products?

[dele30]

why do you use 5w 30?

[graphikg]

Thats what the previous owner of the engine said to use, and that is what the person who installed the motor said to use. What do you recommend? I am thinking of switching to 15-40 or 15-50 full syn.

[MIKe30]

why do you use 5w 30?

Dealer recommends and uses 10w-30 regular oil, or if recently rebuilt or raced 5w-30 synthetic for any motor prior to '99. According to parts guy at dealer anyway...

[SpecM]

m/s50s really need 15/40 or 15/50

after that, I'd use 5/40

[graphikg]

thats what I thought. I am going to switch once this oil gets dirty.

[mazur]

m/s50s really need 15/40 or 15/50

after that, I'd use 5/40

I'm curious to know why it "needs" a heavier weight. Did someone prove the benefits with oil analysis or something?

[Mossman]

BMW dealer oil is 5w-30 (although i've heard it's on the heavy end of the spectrum), but regardless we used that at the shop I used to work at and I put it in hundreds of m50, m52, s50, s52, with no ill effects. Sure if you're racing use something heavier...I've got 5w50 in mine right now, think i'll go 0-40 for winter time.
Oil level matters a lot with the ticking, are you sure you're not down a couple quarts?

[z31maniac]

I'm curious to know why it "needs" a heavier weight. Did someone prove the benefits with oil analysis or something?

Doesn't the manual call for 15/40 as the stock weight?

[SpecM]

Doesn't the manual call for 15/40 as the stock weight?

yes it does

BMW specified that wieght untill 1995, when they switched to 5/30

[e30trooper]

My car burns 1qt of 20/50 every 1500miles :D but I drive hard

[evil_twin]

Im running 10/40 amsoil and it's amazing.

[graphikg]

^^^ Do you buy that online? Where is the best deal for the Amsoil?

[e30s50dan]

^^^ got to the Amsoil web site and do dealer search,i did and damn,1 here 15 miles away,that i didnt know sold it

[bostonbmw]

Im running 10/40 amsoil and it's amazing.

How is it amazing ?