Syn or Not??? Lucas and Seafoam???

[mrfc3s]

Ok, im doing my first Oil Change on the bimmer tomarrow, but I had a few questions that i wanted to get down first...
1. Are Synthetics Prefered For These Cars? or does it really matter??? I know with the gear box it does, but would it be just as good to use Lucas Oil Stabilizer and good ol 10W-40??? Would i be better off to use the syn??? and Could/Should i use Lucas and Seafoam with it???

2. Would it be a bad idea to use Lucas with Seafoam?(together) thinking that the Lucas and the seafoam cancel eachother out... I know i wana use the seafoam...

I just want to know that my engine is properly lubed and not gummed up and stuff...

I dont know if this topic has been addressed, I searched and found nada...
thanks for any information in advanced...

forgot to mention that my engine has 209,000 on the clock...

[Starmavin]

Straight 10W-40 will work fine go thicker in hotter climates, avoid additives. Conventional oils such as castrol GTX are good, do not use pennzoil, garbage. Synthetics are far better, don't follow the hype that says you can't go back, you can.

[325eXTATIC]

Starmavin is (as usual) correct, with the only caveat being that if you use synthetics, it might, and I stress MIGHT cause a few leaks because the synthetics tend to remove varnishes and deposits, and if that is all that is holding some leak in, it might seep some more... I just switched and I do have a new oil pan leak. It's minor enough that I am not going to replace the gasket or anything (unless things get worse quickly) because the loss amounts to well less than half a quart per month... no big deal! What I have noticed in the past is once you switch, the first couple oil changes AFTER you switch to synthetic might look blacker (is that even a word?) than standard dino-juice might, because the syn-juice cleans the various deposits out.

Hope this helps!

Josh W.