What oil weight is everyone using?

[nando]

Said to be a top quality oil, but too thin? Engine does not burn any oil and is fairly quiet...

his car was a rusty POS. I wouldn't neccesarily listen to him. ;)

[briansjacobs]

I highly recommed refreshing your motor before you need to rebuild your motor.

[E30 331is]

Previous owner used 20w-50 with 1qt synthetic... anyone make their own blends?

[immajackuup]

0w40 or 10w40 depend where you live at,20w50 is too thick and will damage bearing little by little on start up.

[5Toes]

15w40

[bmwsun]

5w40 synthetic total

[e30strokr]

I used 5-40 regular oil, most damage happens at startup so I want the oil getting thru the passages ASAP!, the 3k or 3 months change is what the oil companies want you to do ;) for the experts in here is Mobil "synthetic" Group III or Group IV again?

[e34john]

10w40 but last time I used 20w50 just to see if it would leak less.

[Irish1]

I use the Amsoil high zinc 20-50 weight. My M20 has 202,000 miles and burns about 1/4 of a quart every 2500 miles. That's acceptable to me.

[QUKBMER]

redline syn 20w50

[///digitalme]

10 w40 is what my m42 likes...

[Jaxx_]

15w-50 mobil1 synthetic

[TurboJake]

Castrol 20w-50 Spring/summer/fall
Delo 15w-40 winter.

[SUICIDE109]

10w 30 Mobile 1 full synthetic because I live Michigan, summer months I'll put a heavier weight in.

[pantelones]

This is a good thread, my search of ZDDP (Zinc Dialkyl Dithiophosphate) brought me here.

I was on the I.E. site and they say to go to this web site if you are using a preformance cam, and/or have other mods done the the m20.

http://hskrennsport.com/

Has anyone used their products? Or would if be better to use an oil with a higher amount of ZDDP already in it?

I thought this was pretty interesting too...

That’s when the powers that be in Washington (read as the Environmental Protection Agency - EPA) decided that the percentage of zinc additives in passenger car motor oil was too high and was destroying catalytic convertors and therefore polluting the air. Well, we all want cleaner air and longer life in our catalytic converters, so I can’t fault the government. Alright, maybe just a little, but you see they failed to tell us something. With “us” being the flat tappet push rod people. You know, the solid and hydraulic lifter camshaft people, and you know who you are.

I just put some 5w-30 in my car since it hasn't been running much due to being restored, but after I get it going I plan on putting some proper oil in it.

It seems to be that Mobile 1 15w-50 seem like the best choice for the summer.

mobil 1 15w50 actually has decent amounts of ZDDP

So would it be a good idea to add a ZDDP additive? Or just run it as is?